DEVELOPMENT AND EVALUATION OF F5 BREEDING LINES FOR YIELD AND YIELD ATTRIBUTES IN RICE (ORYZA SATIVA L.)

The objective of experiment is to detect genetic purity in the F 1 rice plants comprising of total 128 samples from four crosses viz., Lalkada Gold GR-18, NVSR-2435 Sardar, Maudamani NVSR-2435 and Swarna Sub-1 NVSR-2435 and to analyse the genetic variability in F 5 breeding lines by applying field rapid generation advancement (FRGA) approach under field condition.To assess the hybridity of the resulting F 1 population, polymorphic markers within the parental combination with varied positions of female and male parent specific bands were identified.Total 16, 9, 12 and 11 primes were found to be polymorphic for parents out of different 37 SSR markers tested for polymorphism among the four crosses, respectively.The hybrid purity test findings revealed that 85 out of 128 samples of 4 cross combinations were found true hybrids and forwarded for selection with precision in succeeding generations from crossing programme to F 5 during Kharif-2021 to Kharif-2023.Forty-two genotypes of rice were examined for the genetic variability parameters for 10 yield contributing traits in F 5 breeding lines.An analysis showed that there is a significant degree of variability among these genotypes.Higher value of GCV for GPP and SYPP and higher value of PCV for PTPP, GPP, 100GW, SYPP and GYPP were observed.High heritability coupled with high GAM was observed for DFF, 100GW and SYPP.The progenies 23KDSBF 5 -35, 23KDSBF 5 -13 and 23KDSBF 5 -19 were identified as elite genotypes which shown significantly higher grain yield over the check varieties.