Line × tester analysis of quantitative traits for short duration and high yielding of Brassica rapa in Bangladesh

Abstract

Three lines and nine testers are used for hybridization following Line × Tester mating design to get 27 hybrids. Evaluation of segregating generation was done to study combining ability effect and find out high yielding genotypes. Analysis of variance showed that mean squares due to replications, genotypes, lines, tester and interaction of line and tester were significant for all the studied traits except days to maturity and days to flowering in case of lines. It indicated that a large amount of variation present among the studied materials for these traits. Specific combining ability is considered an important criterion for evaluation of hybrid. From the result, the cross BS-14 × BC-4093 has shown the highest value of SCA in case of yield per plant. On the other hand, the parent BS-14 has the highest GCA effect among three lines in case of yield per plant. Besides, the tester BC-4093 has the highest GCA effect for yield per plant. Other side, considering days to maturity the cross BS-14 × SBC-2193 and the parent BS-17 has been exploited for future breeding by adopting proper strategies for short duration variety development. Besides, considering both traits (short duration and high yielding) the hybrid BS-15 × BS-9 could be selected for future use after large scale evaluation.

Bangladesh J. Agril. Res. 49(4): 385-391, December 2024