International Journal of Agriculture Extension and Social Development

author(s)
Sachin Kumari and RK Sheoran

abstract
The present investigation comprised seventy-five hybrids developed by making crosses between fifteen female parents (lines) and five male parents (testers) in line x testers mating design along with one standard check (HSFH 848). Researchers made the crosses at the research area of the Oilseed Section, Department of Genetics and Plant Breeding, CCS HAU, Hisar for the time of spring season of 2014. They assess the value of the hybrids and parents under four contrasting environments i.e. Summer 2014, the last week of August (E1) and the First week of Sept. (E2), and for the time of spring 2015, i.e. first week of February (E3) and the last week of February (E4). They set down the data on five willy-nilly selected plants from each genotype in each replication on different quantitative characters viz. plant height (cm), head diameter (cm), stem diameter (cm) days to 50% flowering, days to maturity, hundred seed weight (g), seed yield per plant (g), oil content (%), hull content (%), percent seed filling, germination (%), electrical conductivity (µScm-1g-1), viability (%), vigor index I, vigor index II, palmitic acid (%), stearic acid (%), oleic acid (%) and linoleic acid (%) in all the test environments. The study found Hybrids CMS 207 A x HRHA 5-3, CMS 852 A x RHA 271, CMS 207 A x RHA 297, CMS 234 A x 6D-1, and CMS 207 A x 6D-1 better and superior for combining ability and heterosis studies for seed yield and its contributing trait and also for oil content. The combining ability analysis divulges the non-additive variance in the expression of all the traits. Among lines, CMS 207 A, CMS 148 A, CMSH 91 A, CMS 17A, and testers RHA 271 and HRHA 5-3 demonstrated the qualities of good general combiners. The hybrids with good heterotic value, good GCA, SCA, and better value of stability can be directly used for heterosis breeding because of their dominant nature. The use of genotypes in hybridization from these results is likely to produce more heterotic combinations in the future.