Thumbnail Image

Theses

Browse

2010 - 201953
Reset filters
Subject: Vegetable Science × End date: 2019 × Start date: 2010 ×
Reset filters

Search Results

Now showing 1 - 9 of 53
  • Thumbnail Image
    ThesisItemOpen Access
    Genetic variability and interrelationship among horticultural traits in faba bean (Vicia faba L.)
    (palampur, 2017-06-30) Sharma, Simran; Singh, Yudhvir
    The present investigation entitled, “Genetic variability and interrelationship among horticultural traits in faba bean (Vicia faba L.)” was undertaken at the Research Farm of the „Department of Vegetable Science and Floriculture‟, College of Agriculture, CSK HPKV, Palampur during winter season 2015-16. The experimental material comprising of thirty five genotypes of faba bean including one check namely, „Vikrant-B‟ were evaluated in randomized block design over three replications to assess the nature of genetic variability, association among various traits, and their direct and indirect effects on pod yield per plant for effective selection. Data were recorded on nineteen characters viz., days to 50 per cent flowering, node at which first flower appears, branches per plant, pods per node, nodes per plant, plant height (cm), days to maturity, pod length (cm), pods per plant, pod yield per plant (g), seeds per pod, seed yield per plant (g), seed size (cm), 100-seed weight (g), harvest index ( per cent), total soluble solids (oBrix), dry matter ( per cent), ascorbic acid (mg/100g) and protein content ( per cent). In addition, morphological characterization for seed colour was also recorded visually. The observations were recorded on ten competitive plants which were randomly selected in each entry over the replications. On the basis of mean performance, „Local-1-C‟ was the top ranking genotype for pod yield per plant which significantly outperformed all the genotypes with an increase in yield of 44.58 per cent over check „Vikrant-B‟. In addition, fifteen genotypes produced pod yield similar to that of „Vikrant-B‟. HB-123-B (54.00g), HB-123-C (51.00g), HB-511-C (48.00g), PRT-7-B (46.87g), HB-40-A (46.67g) and HB-193-A (45.33g) were the top performing genotypes among them. The superior performance of these genotypes for fresh pod yield per plant was mainly attributed to their superior/comparable performance for pods per node, nodes per plant, pod length, pods per plant, branches per plant, seed yield per plant, 100-seed weight to that of best performing check „Vikrant-B‟. High heritability along with high genetic advance was observed for node at which first flower appears, pods per plant, harvest index, protein content and pod yield per plant indicating the inheritance of these characters under the control of additive gene action and selection would be more effective for their improvement. Based on correlation and path coefficient analysis, nodes per plant, pods per plant, branches per plant, seed yield per plant, seed size, 100-seed weight, harvest index and protein content could be considered as the best selection parameters for evolving high yielding genotypes.
  • Thumbnail Image
    ThesisItemOpen Access
    VARIABILITY AND ASSOCIATION STUDIES IN F4 PROGENIES OF TOMATO (Solanum lycopersicum L.)
    (CSHHPKV Palampur, 2017-06-15) SEHGAL, NIDHI; Chadha, Sanjay
    Tomato (Solanum lycopersicum L.) is one of the most important solanaceous vegetable crops grown widely all over the world. Its cultivation in commercial growing pockets of Himachal Pradesh is severely affected due to bacterial wilt disease caused by Ralstonia solanacearum Smith. Resistant genotypes have been developed at various research centers, located within the country and abroad but these genotypes were not found suitable for growing in Himachal Pradesh as these are lacking in one or other characteristics. The present investigation entitled “Variability and association studies in F4 progenies of tomato (Solanum lycopersicum L.)” was undertaken by evaluating 18 bacterial wilt resistant F4 progenies viz., (Palam Pride × BWR-5)-1-15, (Palam Pride × BWR-5)-1-16, (Palam Pride × BWR-5)-2-3, (Palam Pride × BWR-5)-2-6, (Hawaii 7998 × Palam Pride)-2-7, (Hawaii 7998 × BWR-5)-3-1, (CLN2070B-1 × 12-1)-2-8, (CLN2070B-1 × 12-1)-2-16, (CLN2123A-1 × BWR-5)-3-6, Avtaar-1-3, Avtaar-1-13, Avtaar-1-15, (12-1 × BWR-5)-1-7, (12-1 × BWR-5)-2-2, (12-1 × BWR-5)-2-13, (12-1 × BWR-5)-2-14, (12-1 × BWR-5)-2-18 and (12-1 × BWR-5)-2-19 along with two bacterial wilt resistant standard checks (Palam Pink and Palam Pride) to identify the promising progenies on the basis of nature and extent of genetic variability, association among component traits and marketable yield and direct and indirect effects of each of the component traits on marketable yield. These genotypes were evaluated in Randomized Complete Block Design with three replications in summer-rainy season’2016 at the Vegetable Research Farm of the Department of Vegetable Science and Floriculture, COA, CSK HPKV, Palampur. To ascertain the severity of the disease, two susceptible checks, Roma and Marglobe were planted at every alternate 11th row in the experiment. Analysis of variance revealed significant differences among the genotypes for all the traits except plant survival. The maximum marketable yield per plant was produced by the progenies Avtaar-1-3 (0.87kg) followed by (12-1 × BWR-5)-2-18 (0.76kg), (Hawaii 7998 × BWR-5)-3-1 (0.75kg), (Palam Pride × BWR-5)-2-3 (0.70kg), (Palam Pride × BWR-5)-1-16 (0.69kg), (CLN2070B-1 × 12-1)-2-8 (0.66kg), Avtaar-1-15 (0.63kg) and (12-1 × BWR-5)-2-14 (0.62kg). These top yielding progenies also excelled in many other horticultural traits. For most of the characters high to moderate PCV and GCV estimates along with high heritability and genetic advance were observed. The estimates of PCV were higher than corresponding GCV for all the characters studied which indicated that the apparent variation is not only due to genotypes but also due to the influence of environment. Marketable yield per plant was positively and significantly correlated with total and marketable fruits per plant, gross yield per plant and pericarp thickness at phenotypic and genotypic levels. Days to 50 per cent flowering, locules per fruit, plant height and total soluble solids had significant negative association with marketable yield per plant at genotypic level. Path coefficient analysis revealed that marketable fruits per plant and average fruit weight had the maximum positive contribution (direct and indirect) towards marketable yield per plant, hence these traits require special attention to improve upon marketable yield and other component traits.
  • Thumbnail Image
    ThesisItemOpen Access
    GENETICAL STUDIES IN CHERRY TOMATO (Solanum lycopersicum var. cerasiforme) CULTIVARS UNDER PROTECTED ENVIRONMENT
    (CSKHPKV, Palampur, 2018) Shiksha; Sharma, Parveen
    Fourteen genotypes of cherry tomato were evaluated under modified naturally ventilated polyhouse at the Experimental Farm, Department of Vegetable Science and Floriculture, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur during autumn winter season, 2017-2018 for marketable yield and its component traits to assess the morphological diversity among the genotypes. Based on the mean performance, genotypes viz. Solan Red Round, IC-383117 and EC-383109 were found superior for marketable fruit yield, number of marketable fruits per plant, number of fruits per cluster, number of nodes per plant and plant height among all the genotypes evaluated. Sufficient genetic variability was observed for almost all the traits studied. High PCV, GCV, heritability and genetic advance were observed for number of fruits per cluster and lycopene content. Hence, it was inferred that there is better scope for improvement of these traits through direct selection. Marketable yield per plant was positively and significantly correlated with number of fruits per cluster, number of fruits per plant, number of nodes per plant and plant height at both phenotypic and genotypic level. Number of marketable fruits per cluster had the maximum and significant direct contribution towards marketable yield per plant followed by plant height. However, fruit yield per plant was also significantly increased by indirect effects of number fruits per plant, number of nodes per plant and plant height via number of fruits per cluster. As number of fruits per cluster, plant height, number of fruits per plant and number of nodes per plant have high selection index, therefore due emphasis should be given to these characters in selection programme for improvement of cherry tomato to evolve high yielding genotypes from consumers’ perspective.
  • Thumbnail Image
    ThesisItemOpen Access
    CYTOPLASMIC MALE STERILITY (CMS) BASED HETEROSIS AND GENE ACTION STUDIES IN CAULIFLOWER (Brassica oleracea L. var. botrytis L.)
    (CSK HPKV, Palampur, 2019-09) Sekhon, Bhallan Singh; Singh, Yudhvir
    The present investigation was undertaken to assess the combining ability, nature and magnitude of gene action and to ascertain best heterotic combinations for morpho-physiological, yield and yield contributing and quality traits. Forty eight cross combinations developed by crossing eight CMS lines and six diverse testers in Line × Tester fashion were evaluated along with four standard checks in randomized complete block design with three replications at the Vegetable Research Farm, CSK HPKV, Palampur and HAREC, Bajaura, Kullu during winter 2017-18. Visual, morphological (Ward’s method) and molecular characterization (SSRs) were employed to assess the diversity in parental materials. Out of 35 SSRs, 28 were found to be polymorphic and PIC value ranged from 0.17 to 0.54 with an average of 0.37. The PCoA, PCA and factor analysis delineated the CMS lines into two groups as mid-maturity (CaYCMS-1, CaYCMS-2, CaYCMS-3, CaYCMS-4 and CaYCMS-5) and late group (CaYCMS-6, CaYCMS-7 and CaYCMS-8) CMS lines. All the CMS lines showed similar performance as that of their maintainers for seedling, floral and seed traits. Results of combining ability were discussed by analysing the data in all three possibilities as Experiment I (All CMS lines and testers), Experiment II (5 Mid-late group lines and testers) and Experiment III (3 Late group lines and testers). The bifurcation of experiment reveals the importance of late group lines in terms of earliness and mid-group lines for yield and related traits when analysed for GCA. Thus lines and testers showing good GCA, crosses with good SCA and heterosis in Experiment II and Experiment III were given prime importance. The analysis of variance indicated significant differences among genotypes for most of the traits in both the experiments under all the environments, exhibiting wealth of variability. Location × genotype interaction was significant for most of the traits which indicated a definite role of environment on the performance of genotypes. The line × tester analysis revealed significant differences due to lines, testers and line × tester interaction indicating appreciable diversity in the experimental material. The parental lines viz., CaYCMS-3 and CaYCMS-5 in Experiment II and CaYCMS-6 in Experiment III while testers viz., DPCaY-6, DPCaY-7 and DPCaY-8 in Experiment II and DPCaY-3, DPCaY-5 and DPCaY-9 in Experiment III were identified as good general combiners for earliness and most of the morpho-physiological traits. Among lines CaYCMS-4 and CaYCMS-5 in Experiment II and CaYCMS-7 in Experiment III and testers viz., DPCaY-6 and DPCaY-9 in Experiment II and DPCaY-6, DPCaY-8 and DPCaY-9 in Experiment III were the good general combiners for yield and yield related traits. For quality traits, lines CaYCMS-1, CaYCMS-2 and CaYCMS-5 in Experiment II and CaYCMS-6 and CaYCMS-8 in Experiment III and testers DPCaY-5, DPCaY-6 and DPCaY-7 in Experiment II and DPCaY-5, DPCaY-6 and DPCaY-9 in Experiment III were identified as good general combiners. Non-additive gene action was in preponderance for most of the traits suggesting the exploitation of hybrid vigour in cauliflower. On the basis of GCA, SCA and heterosis, CaYCMS-3 × DPCaY-7 and CaYCMS-3 × DPCaY- 8 in Experiment II and CaYCMS-8 × DPCaY-8 and CaYCMS-8 × DPCaY-9 in Experiment III had appreciable tendency for early maturity across the environments. Crosses viz., CaYCMS-1 × DPCaY-7, CaYCMS-5 × DPCaY-5 and CaYCMS-5 × DPCaY-6 in Experiment II and CaYCMS-6 × DPCaY-8 from Experiment III were observed as promising combination for most of quality traits. For marketable yield, CaYCMS-5 × DPCaY-9 (265.19 q/ ha) and CaYCMS-5 × DPCaY-5 (261.98 q/ ha) from Experiment II and CaYCMS-6 × DPCaY-6 (336.54 q/ ha) and CaYCMS-7 × DPCaY- 7 (329.40 q/ ha) from Experiment III were the most promising cross combinations across the environments. The cross combination CaYCMS-5 × DPCaY-5 also showed appreciable heterosis for dry matter content, TSS, K and Mg. These best performing hybrids could be recommended for release after thorough evaluation over the environments. Further, mid-maturing and late maturing CMS lines can be used for developing hybrids that can mature in succession and provide continuous harvest to the farmers for fetching higher prices in the market. Moreover, separate analysis is recommended for different maturity groups in cauliflower for drawing unbiased conclusions even if the genotypes of different groups were transplanted at same time.
  • Thumbnail Image
    ThesisItemOpen Access
    GENE ACTION STUDIES FOR FRUIT YELD AND HORTICULTURAL TRAITS IN OKRA (Abelmoschus esculentus (L.) Moench)
    (CSKHPKV, Palampur, 2019-07-22) Singh, Akhilesh; Sood, Sonia
    The present investigation entitled “Gene action studies for fruit yield and horticultural traits in okra (Abelmoschus esculentus (L.) Moench)” was carried out at the Experimental Farm of the Department of Vegetable Science and Floriculture, CSK HPKV Palampur to gather information on genetic architecture for fruit yield and horticultural traits in okra. The experimental material comprised of 51 triple test cross progenies derived by mating 12 lines with three testers namely, 9801 (L1), Hisar Unnat (L2) and their single cross F1 (L3). This genetic material was evaluated in Randomized Complete Block Design with three replications during May to October, 2018. The observations were recorded on ten randomly selected plants in each entry over the replications on different quantitative traits [days to 50 per cent flowering, days to first picking, first fruit producing node, nodes per plant, internodal length (cm), fruit length (cm), fruit diameter (cm), average fruit weight (g), plant height (cm), harvest duration (days), fruits per plant and fruit yield per plant (g)], quality traits [immature fruit colour, fruit pubescence, ridges per fruit, dry matter (%) and mucilage (%)] and screening for yellow vein mosaic disease. Epistasis was found to be an integral part of genetic variation for majority of the traits including fruit yield per plant. Epistatic interaction for most of the traits was j+l type except first fruit producing node, nodes per plant, internodal length, fruit length, fruit diameter, average fruit weight, fruits per plant, ridges per fruit and dry matter whereas harvest duration, fruit yield per plant and mucilage carried both ‘i’ and ‘j+l’ type with predominance of ‘i’ type except fruit yield per plant. Additive component (D) was more pronounced than dominance component (H) for most of the traits except mucilage. Both additive and dominance components were of almost equal magnitude for mucilage indicating the importance of both additive and dominance type of gene action. Degree of dominance was in the range of partial dominance for most of the traits, while mucilage showed complete dominance. The kind of genetic variance revealed from triple test cross can be exploited by intermating selected individuals in early segregating generations with delayed selection in later generations, diallel selective mating/ biparental mating or recurrent selection followed by pedigree method to exploit both additive and non-additive components alongwith epistasis. Lines IC-169468, Parbhani Kranti, P-8, VRO-6 and Japan Round were found to be good general combiners for majority of the traits. The cross-combinations Parbhani Kranti x Hisar Unnat, P-8 x Hisar Unnat and VRO-4 x Hisar Unnat exhibited high SCA, heterobeltiosis, economic heterosis and per se performance for fruit yield per plant and were rated as potential crosses. Parbhani Kranti x Hisar Unnat, P-8 x Hisar Unnat and Parbhani Kranti x 9801 were the best cross-combinations for majority of the traits and were moderately resistant (Parbhani Kranti x 9801) to resistant (Parbhani Kranti x Hisar Unnat and P-8 x Hisar Unnat) to the YVMV disease. Due to ease in manual emasculation and pollination and resistance to yellow vein mosaic virus disease in the hybrids, it shall be a desirable proposition to exploit the parental lines of okra, in particular those revealing high SCA in the present study for the development of hybrids.
  • Thumbnail Image
    ThesisItemOpen Access
    EVALUATION OF ROOTSTOCKS FOR BIOTIC STRESS MANAGEMENT IN TOMATO UNDER PROTECTED CONDITIONS.
    (CSKHPKV, Palampur, 2019-05-14) Sharma, Vibhuti; Kumar, Pardeep
    Tomato is one of the principle vegetables grown under protected conditions worldwide. Biotic stresses are among major constraints which are affecting vegetable crops. Bacterial wilt of tomato (Ralstonia solanacearum) is one of the devastating bacterial diseases affecting vascular bundles of plants. Plant-parasitic nematodes are economic pests of agriculture importance and tomato is regarded as the favourable host for root knot nematode. Vegetable production and productivity is very high under protected environments as compared to open field conditions. But production under protected conditions has suffered a great setback due to biotic stresses such as bacterial wilt caused by Ralstonia solanceraum and nematode infestation (Meliodogyne sp.) Both these problems are not easy to manage and there is no effective chemical treatment to manage these biotic stresses under polyhouses. The chemical control measures and manipulation of agronomical practices are not effective to control the disease. Hence, identification and development of new improved disease resistant cultivars is very important to boost up the production and productivity of crop in wilt prone areas of H.P. In order to combine various desirable horticultural traits in tomato along with resistance to diseases, the most appropriate approach is grafting of desirable scion on resistant rootstocks. Therefore, keeping above mentioned facts, the present investigation entitled “Evaluation of rootstocks for biotic stress management in tomato under protected conditions” was carried out in a Randomized Block Design with three replications and cleft grafting method was used to graft desirable scion on resistant rootstocks. The treatments comprised of sixteen different rootstocks and one commercial hybrid GS-600 which was horticulturally superior and was used as a scion. The data were recorded on various growth parameters, horticultural and quality traits. All rootstocks used in the study were found resistant to bacterial wilt. For nematode incidence rootstocks Green Gourd (Tomato), Brinjal (VI-34845), Chilli rootstocks (PI-201232 and AVPP0205) were found to be resistant. Whereas, Brinjal rootstock VI-47335 (EG-195) was found moderately resistant. Rootstock Green Gourd and VI-34845 were found resistant for bacterial wilt as well as for nematode incidence. Therefore, these rootstocks can be used for countering biotic stresses such as (bacterial wilt and nematodes) efficiently under protected conditions. For early production to fetch higher returns plants grafted on rootstock LS-89 proved best as it was found superior to other rootstocks for days to first flowering (28.00) and days to first harvest (75.50). To get higher yield in terms of number of marketable fruits per plant (23.67), average fruit weight (91.50 g), marketable fruit yield per plant (2.16 kg) and marketable fruit yield per square metre (25.92 kg/m2) as well as for prolonged harvest duration (72.62 days) plants grafted on tomato rootstock Green Gourd found superior. The rootstock Hawaii-7998 showed higher success rate (97.00 %) when scion GS-600 was grafted on it. Grafted plants on various rootstocks excelled in quality over non-grafted plants and were high-caliber for TSS (5.48 0 Brix ) which was found higher in plants grafted on rootstock Arka Nidhi. Lycopene content (6.75 mg/100 g) was recorded maximum in plants grafted on rootstock Back Attack. Whereas, titrable acidity an important quality trait was detected in plants grafted on rootstock VI-47335 (0.67%). Fruit firmness hold great significance for enhanced shelf life as well as maintaining quality during transit was recorded highest in plants grafted on rootstock Palam Pink (4.34 kg/cm2). Ascorbic acid content which has exceptional importance in human health was also adjudged highest in plants grafted on rootstock Palam Pink (21.94 mg/100g). This rootstock also recorded maximum fruit length (5.49 cm) as well as fruit width (5.99cm). Pericarp thickness which plays remarkable role in long distance transportation was recorded highest in plants grafted on rootstock Palam Pride (5.81mm). Benefit cost ratio is a critical factor in crop production to determine the expenses incurred and returns received in any crop production. Higher Benefit: cost ratio (10.76) was found in plants grafted on rootstock Green Gourd.
  • Thumbnail Image
    ThesisItemOpen Access
    EVALUATION OF ROOTSTOCKS FOR BIOTIC STRESS MANAGEMENT IN TOMATO UNDER PROTECTED CONDITIONS.
    (CSKHPKV, Palampur, 2019-05-14) Sharma, Vibhuti; Kumar, Pardeep
    Tomato is one of the principle vegetables grown under protected conditions worldwide. Biotic stresses are among major constraints which are affecting vegetable crops. Bacterial wilt of tomato (Ralstonia solanacearum) is one of the devastating bacterial diseases affecting vascular bundles of plants. Plant-parasitic nematodes are economic pests of agriculture importance and tomato is regarded as the favourable host for root knot nematode. Vegetable production and productivity is very high under protected environments as compared to open field conditions. But production under protected conditions has suffered a great setback due to biotic stresses such as bacterial wilt caused by Ralstonia solanceraum and nematode infestation (Meliodogyne sp.) Both these problems are not easy to manage and there is no effective chemical treatment to manage these biotic stresses under polyhouses. The chemical control measures and manipulation of agronomical practices are not effective to control the disease. Hence, identification and development of new improved disease resistant cultivars is very important to boost up the production and productivity of crop in wilt prone areas of H.P. In order to combine various desirable horticultural traits in tomato along with resistance to diseases, the most appropriate approach is grafting of desirable scion on resistant rootstocks. Therefore, keeping above mentioned facts, the present investigation entitled “Evaluation of rootstocks for biotic stress management in tomato under protected conditions” was carried out in a Randomized Block Design with three replications and cleft grafting method was used to graft desirable scion on resistant rootstocks. The treatments comprised of sixteen different rootstocks and one commercial hybrid GS-600 which was horticulturally superior and was used as a scion. The data were recorded on various growth parameters, horticultural and quality traits. All rootstocks used in the study were found resistant to bacterial wilt. For nematode incidence rootstocks Green Gourd (Tomato), Brinjal (VI-34845), Chilli rootstocks (PI-201232 and AVPP0205) were found to be resistant. Whereas, Brinjal rootstock VI-47335 (EG-195) was found moderately resistant. Rootstock Green Gourd and VI-34845 were found resistant for bacterial wilt as well as for nematode incidence. Therefore, these rootstocks can be used for countering biotic stresses such as (bacterial wilt and nematodes) efficiently under protected conditions. For early production to fetch higher returns plants grafted on rootstock LS-89 proved best as it was found superior to other rootstocks for days to first flowering (28.00) and days to first harvest (75.50). To get higher yield in terms of number of marketable fruits per plant (23.67), average fruit weight (91.50 g), marketable fruit yield per plant (2.16 kg) and marketable fruit yield per square metre (25.92 kg/m2) as well as for prolonged harvest duration (72.62 days) plants grafted on tomato rootstock Green Gourd found superior. The rootstock Hawaii-7998 showed higher success rate (97.00 %) when scion GS-600 was grafted on it. Grafted plants on various rootstocks excelled in quality over non-grafted plants and were high-caliber for TSS (5.48 0 Brix ) which was found higher in plants grafted on rootstock Arka Nidhi. Lycopene content (6.75 mg/100 g) was recorded maximum in plants grafted on rootstock Back Attack. Whereas, titrable acidity an important quality trait was detected in plants grafted on rootstock VI-47335 (0.67%). Fruit firmness hold great significance for enhanced shelf life as well as maintaining quality during transit was recorded highest in plants grafted on rootstock Palam Pink (4.34 kg/cm2). Ascorbic acid content which has exceptional importance in human health was also adjudged highest in plants grafted on rootstock Palam Pink (21.94 mg/100g). This rootstock also recorded maximum fruit length (5.49 cm) as well as fruit width (5.99cm). Pericarp thickness which plays remarkable role in long distance transportation was recorded highest in plants grafted on rootstock Palam Pride (5.81mm). Benefit cost ratio is a critical factor in crop production to determine the expenses incurred and returns received in any crop production. Higher Benefit: cost ratio (10.76) was found in plants grafted on rootstock Green Gourd.
  • Thumbnail Image
    ThesisItemOpen Access
    EVALUATION OF POWDERY MILDEW RESISTANT PYRAMID LINES OF GARDEN PEA (Pisum sativum L.) UNDER MID HILL CONDITIONS OF HIMACHAL PRADESH.
    (CSKHPKV, Palampur, 2019-06-29) Raj, Priyanka; Katoch, Viveka
    The present investigation entitled “Evaluation of powdery mildew resistant pyramid lines of garden pea (Pisum sativum L.) under mid hill conditions of Himachal Pradesh” was carried out at the Experimental Farm of Department of Vegetable Science and Floriculture, CSK HPKV, Palampur during rabi seasons 2017-18 and 2018-19 to identify high yielding powdery mildew resistant line(s) and to assess genetic variability and association amongst yield and quality traits in garden pea. The experiment was laid out in randomized block design (RBD) with three replications utilizing seven lines viz., Line 1-2, P116-2, P-227, P120-4, P120-1, P116-3 and P138-2 and three checks namely, Azad P-1, Palam Priya and Punjab-89. Data were recorded on yield and related horticultural traits including powdery mildew incidence. The analysis of variance indicated significant differences among lines for all the traits studied. On the basis of pod yield per plant, other component traits and powdery mildew resistance Line 1-2, P-227, P120-4 and P138-2 have been identified as promising lines for cultivation in mid hill conditions of Himachal Pradesh. High magnitude of PCV and GCV coupled with high heritability and high genetic gain was observed for number of primary branches per plant, internodal distance and number of nodes per plant. Correlation analysis indicated that pod yield per plant can be enhanced by enhancing number of pods per plant, number of seeds per pod, number of primary branches per plant, total soluble solids, pod length and number of nodes per plant. Path analysis revealed that for effective improvement in pod yield per plant in garden pea, the selection should be done for more number of pods per plant, number of primary branches per plant, pod length, number of seeds per pod, number of nodes per plant and less internodal distance.
  • Thumbnail Image
    ThesisItemOpen Access
    GENETIC VARIABILITY AND INTER RELATIONSHIPS AMONG BULB YIELD AND ASSOCIATED TRAITS IN GARLIC (Allium sativum L.)
    (CSKHPKV, Palampur, 2019-06-20) Sharma, Shivam; Chaudhary, D.R.
    The present investigation entitled “Genetic variability and inter relationships among bulb yield and associated traits in garlic (Allium sativum L.)” was undertaken at the Research Farm of Department of Vegetable Science and Floriculture, CSKHPKV, Palampur during Rabi, 2017-18. Twenty five genotypes including GHC-1 as standard check, were evaluated in a RBD with three replications to assess various parameters of genetic variability. The data were recorded on ten competitive plants in each entry over the replications for bulb yield and yield related traits. The analysis of variance revealed the presence of sufficient genetic diversity amongst genotypes for all the traits studied. Based on mean performance, Kanaid Local Selection and Chambi Local Selection were the top ranking genotypes for bulb yield per plant which significantly out yielded all the genotypes with a significant increase of 28.74 % and 12.71 %, respectively over standard check, GHC-1. High estimates of PCV and GCV coupled with high heritability and high genetic advance as percentage of mean was observed for bulbils per plant, clove weight, leaf width at middle portion, clove equatorial diameter, cloves per bulb and pseudo stem diameter, suggested the involvement of additive gene action in the inheritance of these traits. The correlation and path coefficients studies revealed that clove weight, bulb equatorial diameter, clove polar diameter, leaf length and clove equatorial diameter were the best selection indices for increasing bulb yield. The Mahalanobis D2 statistic, categorized 25 genotypes into six clusters with cluster V being the largest containing seven genotypes. The highest inter cluster distances were observed between cluster IV and cluster V followed by cluster IV and cluster VI. The cluster IV was found best for bulb yield per plant, bulb yield per plot, clove weight, clove length, clove polar diameter, clove equatorial diameter, bulb polar diameter, bulb equatorial diameter and leaf width at middle portion. The selection of genotypes based upon large cluster distances may lead to favorable broad spectrum genetic variability. The principal component analysis revealed that 92.93 % variation was explained by first six significant principal components. The traits, plant height (PC1 and PC2), clove polar diameter (PC3), leaf length (PC4), cloves per bulb (PC5) and pseudo stem length (PC6) were the maximum contributors towards genetic divergence