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Birsa Agricultural University, Ranchi

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20162
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Subject: Plant Breeding × End date: 2019 × Start date: 2013 × Type: Thesis × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    GENERATION MEAN ANALYSIS OF YIELD AND YIELD ATTRIBUTING TRAITS IN LINSEED (Linum usitatissimum L.)
    (Birsa Agricultural University, Kanke, Ranchi, Jharkhand, 2016) Choudhary, Vinay Kumar; Ram, Sohan
    A study was conducted at Ranchi Agricultural Research farm and Chianki Research farm during Rabi 2013-14 to evaluate 6 populations i.e. P1, P2, F1, F2, BC1 and BC2 from six different crosses for generation mean analysis. Investigation was carried out on variability, nature and magnitude of gene effects, their interactions, heterosis and inbreeding depression for 17 traits i.e. days to 50 per cent flowering ,days to maturity, plant height ,number of primary branches per plant, number of capsules per plant, number of seeds per capsule, capsule diameter, seed yield per plant, test weight, oil content, palmitic acid content, stearic acid content, oleic acid content, linoleic acid content, linolenic acid content, wilt disease reaction and rust disease reaction. Thirty treatments consisting 5 parents, 6F1s, 6F2s, 6BC1s, 6BC2s and one check (LC-54) has laid out in randomized block design with three replications. The analysis revealed highly significant variation among the treatments for all the characters under study at both the locations. Phenotypic and genotypic co-efficient of variation was high for plant height, number of primary branches per plant , number of capsules per plant , wilt disease reaction, rust disease reaction and seed yield per plant at both the locations showing the presence of variability among the treatments for yield and yield attributing traits. Similarly high to moderate heritability as well as genetic advance was recorded for number of capsules per plant, rust disease reaction, wilt disease reaction, oleic acid content and linolenic acid content indicating that breeding for these traits can be use in the development of these traits. The estimates of additive and dominance components through joint scaling test as well as epistasis interaction through six parameter model indicated that additive component has significant role in the expression of number of primary branches per plant, number of seeds per capsule, capsule diameter and test weight at both the locations indicating that transgressive segregants of these characters can be useful in improvement of these traits in segregating generations. Dominance component played a major role in controlling the expression of number of primary branches per plant, number of seeds per capsule, seed yield per plant, test weight and rust disease reaction at both the locations. Among epistatic gene interactions, additive x additive (i) and dominance x dominance (l) interactions effect showed significant impact in comparison to additive x dominance (j) interaction in controlling the expression of plant height, primary branches per plant, number of capsules per plant, number of seeds per capsule, capsule diameter, days to maturity, seed yield per plant, oil content, wilt disease reaction and rust disease reaction by additive x additive (i) interaction, days to 50 per cent flowering, plant height, number of capsules per plant and number of seeds per capsule by dominance x dominance (l) interaction and days to 50 per cent flowering, plant height, number of capsules per plant, days to maturity, oil content, wilt disease reaction and rust disease reaction by additive x dominance (j) interaction at both the locations. Almost all the crosses for all the traits under study exhibited duplicate type of gene action at both the locations whereas few crosses showed complimentary gene action for respective traits at only Ranchi location. Heterosis estimate revealed that the crosses Meera x T-397 and Shekhar x T-397 were found to be the best crosses at both the locations considering the heterotic advantage of these crosses over mid parent, better parent and economic check LC-54. The heterosis manifested in these two crosses were mainly due to desirable heterotic response of important yield component traits like, number of primary branches per plant, number of capsules per plant , number of seeds per capsule, capsule diameter and test weight indicating that development of hybrids and better segregants based on these traits can be fruitful.
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    ThesisItemOpen Access
    GENETIC ANALYSIS FOR YIELD AND QUALITY TRAITS IN INDIAN MUSTARD (Brassica juncea L.)
    (Birsa Agricultural University, Kanke, Ranchi, Jharkhand, 2016) ., Priyamedha; Haider, Z. A.
    The present investigation involves eight lines and five testers to develop forty crosses in a line x tester design. All the thirteen parents and forty crosses were evaluated in randomized block design with three replications in three dates of sowing, representing environments, at Crop Research Centre of Birsa Agricultural University, Ranchi. The experiment was undertaken with a view to determine the per se performance of parental lines, magnitude of heterosis, heterobeltiosis and standard heterosis, to assess the combining ability of parents and crosses, to assess the genotype x environmental interaction and stability parameters of various genotypes for seed yield, yield attributing traits and quality traits. The pooled analysis of variance for sixteen morphological traits indicated significant difference among the environments for all the characters except for siliqua length. The environment wise analysis of variance showed significant differences among the parents and crosses for all the traits studied in all the three environments. On the basis of per se performance, the highest mean seed yield per plant was recorded by the parents Pusa Bold (6.93 g) followed by Pusa Mustard-21 (5.95 g) and NRCHB-101; BPR 543-2 (5.93), while, among crosses, highest was recorded in NRCHB-101 x BPR 543-2 (7.64 g) followed by NRCHB-101 x JN 032 (7.63) and Pusa Bold x Pusa Mustard-21 (7.26). Highest oil content was recorded in JN 032 (42.39 %) followed by NRCDR-02 (42.26 %) and Shivani (41.97 %), while, among crosses, highest was recorded in Shivani x RGN-73 (42.50 %) followed by Pusa Bold x BPR 543-2 (42.38 %) and Shivani x BPR 543-2 (42.38 %). Lowest erucic acid was recorded in Heera (1.77%) followed by Pusa Mustard-21(2.12 %) and JN 032 (3.71 %), while, among crosses, lowest was recorded in BAUSM-92-1-1 x Pusa Mustard-21 (9.65 %) followed by BAUSM-92-1-1 x Heera (14.05 %) Lowest glucosinolate content was recorded in Heera (26.38 μM/g of oil-free seed meal) followed by JN 032 (38.61) and Kranti (64.17), while, among crosses, lowest was recorded in NRCDR-02 x Heera (33.56 μM/g) followed by NRCHB-101 x Heera (35.49) and Shivani x Heera (37.52 μM/g). Out of 40 crosses, BAUM-2007 x Heera, BAUM-2007 x JN 032, BAUM-2007 x RGN-73, Pusa Mustard-25 x RGN-73 and Kranti x Heera came out to be the promising because of having high heterotic effect for seed yield and yield attributing traits. In the case of standard heterosis, crosses BAUM-2007 x JN 032, Pusa Mustard-25 x Heera, Pusa Bold x Heera, BAUM-2007 x Heera and Pusa Bold x Pusa Mustard-21 came out to be the promising crosses for some important yield component characters in most of environments. The cross Pusa Bold x BPR 543-2 was found promising for oil content. The environment wise combining ability analysis revealed significant GCA and SCA variances for almost all the characters studied indicated that all these traits were controlled by both additive and non-additive gene effects. The parents, Pusa Bold, NRCHB 101 and RGN-73 were emerged as good general combiner with high per se performance for seed yield/plant and most of contributing characters. However, the parents, Shivani, Pusa Mustard-25, BAUM-2007, Heera and BPR 543-2 were good general combiners for specific yield component characters. The parents, Shivani, BPR 543-2 and Heera were good general combiners for oil content and other quality traits. Some promising crosses having high SCA effects in desired direction for seed yield/plant and related traits were BAUM-2007 x Heera, Pusa Mustard-25 x JN 032, NRCHB-101 x BPR 543-2, NRCHB-101 x JN 032, BAUSM-92-1-1 x RGN-73 and Kranti x Heera. Some of the crosses having high SCA effects in desired direction were NRCDR-02 x BPR 543-2, NRCHB-101 x Pusa Mustard-21, NRCHB-101 x Heera, NRCDR-02 x Heera, NRCHB-101 x JN 032, Pusa Bold x Pusa Mustard-21, Shivani x Heera, BAUM- 2007 x Heera and BAUSM-92-1-1 x Heera for yield related traits. Stability revealed that genotypes as well as environment were highly significant for all the eight morphological characters under study. This revealed significant variation among genotypes and among environments. Sufficient G X E interaction was exhibited by the genotypes for all the characters. The environment (linear) was highly significant for all the characters, while the linear component of G X E interaction was highly significant for days to maturity only. Pooled deviation differed significantly for all the characters, suggesting the genotypes had varying level of stability over the sowing times for these characters. The parents viz. NRCDR-02, Pusa Bold and BPR 543-2 as well as the crosses viz. Pusa Bold x Pusa Mustard-21, Pusa Bold x RGN-73, Pusa Bold x JN- 032, Shivani x Heera, Shivani x BPR 543-2, Kranti x BPR 543-2 and BAUM-2007 x JN- 032 exhibited high mean and showed stable performance for seed yield/plant. Stability parameters indicated that BAUSM-92-1-1 (plant height and number of seeds/siliqua) and BAUM-2007 x JN-032 (total number of siliqua/plant, number of seeds/siliqua and seed yield/plant) were fairly stable across the environments. BAUM-2007 and Pusa Mustard- 21 showed relatively stable performance for number of siliquae on main shoot and1000 - seed weight over environments. Thus, these genotypes can be utilized to develop stable strains having wider adaptability for different sowing times. Overall crosses based on high per se performance, high SCA effects, high heterobeltiosis and high standard heterosis were BAUM-2007 x JN 032 and NRCHB- 101 x BPR 543-2 in E3 for point to first branch; BAUM-2007 x JN 032 in E3 for point to first siliqua; BAUM-2007 x RGN-73 in E2 for number of secondary branches; Kranti x BPR 543-2 in E2 for number of siliquae on main shoot; Kranti x Heera in E3 for total number of siliqua/plant; Kranti x Heera in E3 for number of seeds/siliqua. As the environmental effect on the expression of the character was very high, different crosses emerged in different environments for different yield attributing traits. Thus, these crosses can be included in the breeding programme for improvement in yield in specific environment.