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ThesisItem Open Access BREEDING FOR PIGEONPEA CAJANUS CAJAN L MILLSP IDEOTYPES FOR SOLE CROPPING(JNKVV,JABALPUR, 1984) SATPUTE, RAMJI GOVINDJI; SINGH, C.B.ThesisItem Open Access STUDY OF INDUCED GENETIC VARIABILITY IN RHIZOBIUM LEGUMINOSARUM OF FABABEAN VICIA FABA TO IMPROVE NITROGEN FIXATION(JNKVV,JABALPUR, 1985) SHUKLA, RAMASHANKER; SINGH, C.B.ThesisItem Open Access GENETIC ARCHITECTURE OF SOME QUANTITATIVE AND QUALITATIVE ATTRIBUTES IN BENGAL GRAM CIVER ARIETINUM L CHICKPEA(JNKVV,JABALPUR, 1988) AGRWAL, S.C.; SHARMA, ANIL KUMARThesisItem Open Access GENETICS OF PHYSIOLOGICAL AND ECONOMIC TRAITS IN BREAD WHEAT TRITICUM AESTIVUM L(JNKVV,JABALPUR, 1990) SINGH, C.B.; SRIVASTAVA, AMAR NATHThesisItem Open Access IDEOTYPE BREEDING BASED ON MORPHOLOGICAL AND BIOCHEMICAL INVESTIGATIONS IN FABA BEAN VICIA FABA L(JNKVV,JABALPUR, 1988) SINGH, C.B.; KHARE, DHIRENDRAThesisItem Open Access Genetics and molecular analyses for phenological, physiological and yield traits in soybean(JNKVV, 2016) Jha, Avinash; Shrivastava, A.N.ThesisItem Open Access Studies on genetic divergence and combining ability analysis for yield and malting quality traits in barley (Hordeum vulgare L.)(JNKVV, 2016) Yadav, Sunil Kumar; Singh, A.K.ABSTRACT The present investigation entitled “studies on genetic divergence and combining ability analysis for yield and malting quality traits in barley (Hordeum vulgare L.)” was conducted to estimate the genetic diversity, heterosis, combining ability analysis, character association, path analysis and selection indices along with the nature of gene effects operative in the inheritance of different traits. The experimental material consisted of 10 barley genotypes and their 45 F1 and 45 F2 progenies generated in half diallel fashion, were evaluated in randomized block design with three replications during rabi 2014 at JNKVV, Instructional farm, College of Agriculture, Rewa (M.P.). The barley parental genotypes were evaluated using biometrical technique and microsatellite markers. A set of 19 morphological and 47 SSR markers revealed significant differences among the quantitative and qualitative traits. In total 166 alleles were scored from PCR based amplification profiles for selected genotypes. The number of alleles ranged from 2 to 7 with an average of 3.52 alleles per locus. The band fragment size varied from 100 bp to 500 bp with PIC values ranging from 0.286 (Bmac154) to 0.804 (KV1/KV2) with an average of 0.551. Genetic diversity was estimated using Euclidean2 distance and UPGMA methods. Euclidean clustering revealed four clusters and groups II, III and IV exhibited highest mean value for most of the traits. Genotypes JB1, LAKHAN, KB1201 and RD2035 were identified as most suitable genotypes for hybrid performance for yield attributing characters like tillers/plant, grains/spike, 1000 grain weight, grain weight/spike, grain size and days to maturity. This information would be used as selection parameters to plan crosses and maximize the use of genetic diversity and expression of heterosis in barley breeding program for yield improvement. The highest mean performance for grain yield/plant along with some of the component traits was exhibited by crosses JB203/HUB113 and K508/JB1. Among the parents, HUB 113 and JYOTI were possessed highest grain yield/plant.The crosses RD2035/KB1201 and K508/JB203 exhibited earliest days to 50% flowering whereas, earliest days to maturity manifested by RD2035/KB1201,RD2869/KB1201 and JB1/JYOTI. Highest estimates of genotypic and phenotypic coefficient of variation were observed in flag leaf area, upper leaf area, tillers/ plant, spikes/ plant and grain yield/ plant in F1 and F2. High estimates of heritability (broad sense) were recorded for most of the characters in F1 and F2. Traits like grains/spike and grain weight/spike showed moderate heritability in F1 and high heritability in F2. Analysis of variance for combining ability revealed that variances due to GCA as well as SCA were highly significant for all the traits studied in both the F1 and F2 generations except spike harvest index and protein content in F1 generation. Thus, both additive and non-additive gene effects were important in controlling the inheritance of the characters under studied. The estimates of SCA variance were higher than the corresponding estimates of GCA variance for all the traits, both in F1 and F2 and the ratio of GCA/SCA were less from the unity, for all the characters under study, suggesting that non-additive gene action was more important than additive gene effects in the inheritance of these traits. The estimates of general combining ability (GCA) effects revealed that out of the ten parents, JB203, K508, HUB113 and JB1 were observed as good general combiners for grain yield/plant. The specific combining ability (SCA) effects, which are supposed to be manifestation of non-additive components of genetic variance, are highly valuable for discrimination of crosses for their genetic worth. Several crosses exhibited significant and desirable SCA effects for one or more characters but none of them emerged as a good specific combiner for all the characters.Few crosses like K508/RD2811, K508/RD2869, JB203/HUB113 and JB203/JB1 were identified with high SCA effects for grain yield/plant as well as some other yield components and the cross JB203/HUB113 having highest positive and significant SCA effects for grain yield/plant. Significant role of additive genetic component (D) and its significant value was observed for the inheritance of days to 50% flowering and days to maturity. The non-additive component (H1) was found to be important for the genetic control of all the traits except days to 50% flowering and days to maturity. The relative magnitude of dominant component (H2) was higher as compared to additive component (D) for all the traits, indicating the preponderance of dominant gene effects in controlling the inheritance of these traits. The efficiency of selection in the segregating generations will increase if the nature and magnitude of interrelationships among component characters and grain yield is understood. Correlations provide the estimates of degree of association between characters whereas, path analysis helps to resolve these correlations into direct and indirect contributions of different component characters towards yield and thus unravels the cause of apparent correlations. Grain yield/plant showed significant and positive correlation with harvest index, tillers/plant, spikes/plant, grain weight/spike and grains/spike. The highest positive direct effect was exerted by harvest index on grain yield/plant at phenotypic and genotypic levels, respectively. Genetic relationships among yield and agronomic traits in barley populations and its application in selection of most appropriate indices so as to reach the highest genetic advance for grain yield and its components.The highest genetic advancement and relative gain were observed when, twelve characters viz., grain yield/ plant (X1), days to 50% flowering(X2), flag leaf area (X3), tillers/ plant(X4), spikes/plant(X5), 1000-grain weight (X6), grains/spike(X7), spike weight (X8), grain weight/ spike (X9), biological yield/ plant (X10), harvest index(X11) and husk content (X12) together formed an efficient selection indices (X1X2X3X4X5X6X7X8X9X10X11X12).Thus selection will be effective in the test materials used in the study as revealed by the significant substantial variations among the genotypes and their derived crosses for the characters observed . Therefore, the significant genetic variability for these characters in the genotypes recorded in the test materials can be further exploited through improvement and selection programmes.ThesisItem Open Access Genetic studies in bread wheat for drought tolerance(JNKVV, 2016) Pawar, Kshitiz Kumar; Singh, A.K.ThesisItem Open Access Genetic analysis of indica-japonica derived NPT lines for yield quality attributes under different situations(JNKVV, 2016) Yadav, Raj Bahadur; Mishra, D.K.