Genetic investigations and diversity analysis in minicore collections of chickpea (Cicer arietinum L.)
| dc.contributor.advisor | P.M.Salimath | |
| dc.contributor.author | S.G.Parmeshwarappa | |
| dc.date.accessioned | 2016-07-23T10:55:06Z | |
| dc.date.available | 2016-07-23T10:55:06Z | |
| dc.date.issued | 2009 | |
| dc.description.abstract | An investigation was carried out to assess diversity for eight quantitative traits under three environments and further characterization for drought tolerance and for studying combining ability effects and variances for identifying potential crosses of chickpea. Significant genotypic differences were observed for all the traits under study suggesting that high variability was observed for most of the productivity related traits. The performance over three environments indicated that ICC6279 was found to be early flowering and ICC13124 is the only top yielder in all the three environments. Association study indicated that seed yield was strongly correlated with pods per plant, 100-seed weight, plant height and number of branches per plant in all the environments. Genetic diversity study indicated considerable diversity in the minicore collections. The genotypes were categorized into 20, 16 and 25 clusters in rainfed condition of 2004-05, 2005-06 and irrigated condition of 2005-06, respectively. The drought tolerant accessions evaluated under moisture stress and irrigated situation during 2006-07 revealed ICC13124 is the only accession found drought tolerant for more than one parameter i.e., high DTE, least Dsi, maximum RLWC, minimum MII and equally good root traits as that of resistant check can be utilized as resistant source in breeding for drought tolerance. The degree of heterosis for seed yield varied considerably among 48 hybrids studied. The top three potential hybrids observed for seed yield over MP, BP and SC were ICC6877×ICC2072, ICC2507×ICC2072 and ICC6877×ICC7315. The combining ability analysis of the crosses revealed predominance of SCA variance for all the traits under study. Parents ICC13124, ICC7315, ICC15697 and ICC6877 were good general combiners for productively traits. Three heterotic crosses viz., ICC11944×ICC13124, ICC9137×ICC13124 and ICC2507×ICC2072 exhibited highly significant positive sca effect with high per se performance for seed yield per plant. The performance of combinations with representing different diversity levels suggest that parents with high diversity have a better chance of showing high heterosis and better F2 performance. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/69503 | |
| dc.publisher | UAS Dharwad | en_US |
| dc.sub | Genetics and Plant Breeding | |
| dc.these.type | Ph.D | |
| dc.title | Genetic investigations and diversity analysis in minicore collections of chickpea (Cicer arietinum L.) | en_US |
| dc.type | Thesis | en_US |