Heterosis for Yield and Quality Traits in Rice (Oryza sativa .L)
-
Author: L. Krishna, Ch.D. Raju, Ch. Surender Raju, S. Vanisree, P. Narsimha Reddy and B.B. Reddy,
p-ISSN: 0024-9602, e-ISSN:2582-5321, Vol: 98, Issue: apr-jun,
DOI:https://doi.org/10.29321/MAJ.10.100254
Abstract
A field experiment was conducted with 28 hybrids generated by crossing 8 parents which
are resistant to gall midge / blast / BPH in 8 x 8 diallel fashion during rabi 2004-05. The mean,
heterosis (H 1
) and heterobeltiosis (H2) were estimated for yield and quality characters. High
amount of heterosis existed only for the yield components viz., panicle weight, 1000-grain
weight and productive tillers plant -1 whereas, it was very low for the quality traits viz., kernel
length and length / breadth ratio. The promising cross combinations identified for further
use in hybrid rice programme were WGL 32100/ White ponni, JGL 1881/ White ponni and JGL
3844/ MTU 4870. The genotypes viz., WGL 32100, JGL 1881 and White ponny are useful for
conversion into male sterile lines or identification of restorer lines because they are resistant
to gall midge.
Keywords: Heterosis, rice, quality traits
