Heritability Estimates in Intra and Inter-Specific F2 Populations of Brassica

Abstract

Six F₂ derived inter and Intra-specific Brassica populations along with their parents were evaluated to estimate heritability at The University of Agriculture, Peshawar during 2012-13. Maximum plant height was 181.62 cm for 560 x 867 (B. napus x B. campestris), primary branches plant^-1 was 12.47 for 525 x 905 (B. napus x B. olaracea), main raceme length was 76.40 cm for 525 x 905 (B. napus x B. olaracea), pods main raceme^-1 was 80.03 for 525 x 905 (B. napus x B. olaracea), pod length was 52 mm for 525 x 905 (B. napus x B. olaracea), pod width was 3.79 mm for 525 x 925 (B. napus x B. olaracea), seed pod^-1 was 16.63 for 614 x 616 (B. juncea x B. juncea), 1000-seed weight was 3.45 g for 609 x 616 (B. juncea x B. juncea). Higher heritability values were found for most of the quantitive traits. In F₂ population maximum heritability estimates were recorded 0.789 in 609 x 616 (B. juncea x B. juncea) for plant height, 0.570 in 609 x 616 (B. juncea x B. juncea) for primary branches plant^-1, 0.660 in 609 x 616 (B. juncea x B. juncea) for main raceme length, 0.722 in 614 x 616 (B. juncea x B. juncea) for pods main raceme^-1, 0.902 in 615 x 617 (B. juncea x B. juncea) for pod length, 0.756 in 609 x 616 (B. juncea x B. juncea) for pod width, 0.833 in 614 x 616 (B. juncea x B. juncea) for seed pod^-1, 0.902 in 614 x 616 (B. juncea x B. juncea) for 1000-seed weight in Intra and Inter-specific F₂ population of Brassica.

Keywords: Brassica, heritability, variability, Interspecific, intraspecific