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Theses

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2010 - 20135
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Subject: Plant Breeding × End date: 2013 × Start date: 2010 ×
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Now showing 1 - 5 of 5
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    ThesisItemOpen Access
    Studies on combining ability and economic heterosis in upland cotton (Gossypium hirsutum L.)
    (CCSHAU, 2011) Manish Kumar; Nirania, K.S.
    The present study was undertaken to estimate economic heterosis with the objective of exploring possibilities of its commercial utilization and to study the combining ability effects. The material for the present investigation comprised of 70 upland cotton genotype viz., 52 hybrids developed on 4 female parents (testers) using 13 male parents (lines) in line x testers mating design along with their 17 parents (4 females and 13 males) and one standard check (Hybrid HHH-223).The experimental material was grown at CCS Haryana Agricultural University, Cotton Research Station Sirsa, during Kharif 2010 in a randomized block design with three replications. Observations were recorded for nine characters namely, plant height, days to first flower, number of monopods, number of bolls, boll weight, ginning out turn, seed index, lint index and seed cotton yield per plant. The economic heterosis for all these characters was calculated over standard check HHH-223. Considerable amount of heterosis were recorded for seed cotton yield and other related characters under study. The hybrids H1226 x HS-1 and H1098 x DELTA SL exhibited heterosis of more than 65 per cent and hence warrant their further testing over locations for commercial utilization. The combining ability analysis revealed that both additive and non additive variances were present in the expression of all the characters with former playing major role for majority of the characters. In general, none of the male and female parents was found to posses high gca effects for all the characters under study. However, considering the economic importance of various characters DELCOT-517, F-1378, AUBURN NE-165, REX-66 and RS-875 among the males and H1226 among females may be used for future breeding programmes.
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    ThesisItemOpen Access
    In Vitro And In Vivo Selection Of Rice Genotypes For Salinity Tolerance And Their Characterization By Molecular Markers
    (Chaudhary Charan Singh Haryana Agricultural University; Hisar, 2010) Bisht, Surinder Singh; Kishor, Chander
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    ThesisItemOpen Access
    Genetic Divergence, Stability Analysis And Characterization Of Citronella And Lemongrass (Cymbopogon Species)
    (Chaudhary Charan Singh Haryana Agricultural University; Hisar, 2010) Singh, Ravinder; Verma, P.K.
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    ThesisItemOpen Access
    Genetic variability for zinc uptake and concomitant traits using agronomic and molecular indices in wheat (Triticum aestivum L.)
    (CCSHAU, 2013) Dinisha Abhishek; Sethi, S.K.
    A study was conducted to investigate variability for Zn, N, and P concentration in grain and straw, grain yield and its components, correlation and genetic diversity in wheat genotypes. The experiment laid out in completely randomized design included 15 hexaploid wheat cultivars, 12 F1 hybrids among them and 107 F2 plants. Results revealed that mean sum of squares due to genotypes (Parents and F1s) were significant for all the characters. Grain zinc concentration among parental lines ranged from 33.09 to 77.06 Ig/g, N concentration ranged from 2.79 to 5.10 % and P concentration ranged from 4171.00 to 5809.75 Ig/g. The highest level of Zn and N concentration was observed in cultivar C 306, and highest P concentration was observed in KRL 19. Some hybrids had more Zn, N and P concentrations while others had less as compared to their parental varieties The F2 population obtained from a cross between PBW 343 × KRL 19 showed large segregations for grain zinc (25.78 to 119 Ig/g ), N (1.5 to 5.2 %) and P (3292.35 to 8458.50 Ig/g) concentration. F1 hybrids had increased plant height, broader flag leaf area, more number of tillers and higher 1000-grain weight which resulted in higher grain yield when compared to their parental varieties. Correlation coefficients revealed no clear association of grain zinc concentration with grain yield and 1000-grain weight. However, phytic acid exhibited positive association with grain: zinc, protein and total phosphorus. Flag leaf area, 1000-grain weight, number of tillers and dry matter were significant component of grain yield. Genetic diversity for zinc assimilation in representative sets of wheat cultivars was studied at molecular level. Of 54 SSR primer pairs studied, 44 showed polymorphism, when screened in 15 wheat cultivars. A total of 165 alleles were identified averaging 3.1 alleles per locus. The value of average polymorphic information content for these SSR markers was estimated to be 0.42. The mean PIC value suggested that SSR marker system is effective in determining polymorphism. The SSR primer pairs found polymorphic in both PBW 343 and KRL 19 were selected to screen their 48 F2 plants. Of 20 polymorphic microsatellite markers screened, only 6 showed allelic variability both in parents and F2 plants with 30% polymorphism.
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    ThesisItemOpen Access
    Molecular Mapping Of Fusarium Wilt In Pigeonpea (Cajanus Cajan. L Millsp.)
    (Chaudhary Charan Singh Haryana Agricultural University; Hisar, 2010) Naresh Kumar; Singh, Dhiraj