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2003 - 20062
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Subject: Genetics × End date: 2009 × Start date: 2003 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Cytogenetic studies on induced mutants of cotton (Gossypium spp.)
    (College of Agriculture Chaudhary Charan Singh Haryana Agricultural University Hisar, 2003) Usha; Singh, K. P
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    ThesisItemOpen Access
    Phenotyping of CSR-10 X HBC-19 RILs in rice
    (CCSHAU, 2006) Pummy Kumari; Ahuja, Uma
    The present investigation was undertaken to characterize 231 recombinant inbred lines (F7) from a cross of CSR-10 X HBC-19 for agronomic and grain quality traits. RILs were grown in augmented design at experimental area of CCS HAU Rice Research Station, Kaul during kharif season of 2004-05. Data was recorded on various morphological traits as plant height, tillers per plant, grain yield per plant, 1000-grain weight and quality traits as hull colour, grain colour, hulling and milling percentage, raw grain dimensions, cooked grain dimensions, aroma, alkali value and amylose content. Data was analyzed for correlation coefficient and regression analysis to estimate the levels of variation and association among agronomic and grain quality traits. RILs of F7 population showed large variation for all the agronomic and grain quality traits. High genotypic (GCV) and phenotypic (PCV) coefficient of variation were observed for maximum number of traits except thickness of raw grain and hulling percentage. GCV occupied major extent of PCV. Correlation coefficient revealed that yield per plant was associated with 1000-grain weight and plant height but not with grain quality traits, indicating that yield can be combined with grain quality. However, a balance has to be maintained as 1000-grain weight showed negative association with grain quality traits. In addition to parental hull colours, different colours as light brown, dark brown, red and yellowish green were observed. Similarly, in addition to parental creamish grains, various colours as light brown, green, medium red and reddish brown were observed. Mildly aromatic entries were observed in addition to highly aromatic, non-aromatic parents and RILs. Frequency distinbution indicated transgressive variation indicating polygenic control for all traits. High variability observed for all agronomic traits and hull colour, grain colour, hulling and milling percentage, length of raw grain, length: breadth ratio and elongation ratio make these RILs ideal population for linkage studies and molecular marker analysis.