Combining ability (GCA & SCA), heterosis and inbreeding depression analysis for quantitative traits in yellow sarson (Brassica rapa var. yellow sarson)

Abstract

The analysis of variance indicated significant differences among the treatments for all the characters. Parents vs. F1s, parents vs. F2s and F1s vs. F2s also revealed highly significant differences for all the characters except number of primary branches per plant. The estimate of were lower than for all the characters. The analysis of variance for combining ability were found significant differences for all the characters except number of primary and secondary branches per plant in both F1 and F2 generations. The parents namely; YSKM-10-1, T-42, YSC-40, NRCYS-05-02 and Pitambari were found common good general combiners in both F1 and F2 generations based on gca effect and per se performance for dwarf plant height. The cross combinations namely; YSC-63 x NRCYS-05-02, B-09 x Pitambari, YSKM-11-02 x YSH-401, YSKM-10-02 x Pitambari and YSC-80 x YSH-401 were found common good specific combiners in both F1 and F2 generations on the basis of sca effects and per se performance for dwarf plant height. The cross combinations namely; YSC-63 x NRCYS-05-02, YSKM-11-02 x YSH-401, YSC-80 x YSH-401, T-42 x NRCYS-05-02 and YSC-84 x YSH-401 were shown desirable and significant heterotic response over better and economic parent and high inbreeding depression for dwarf plant height.