Indian Society of Genetics & Plant Breeding

Important

GENETICS OF EMBRYO SIZE AND ITS RELATIONSHIP WITH SEED AND SEEDLING VIGOUR IN RICE (ORYZA SATIVA L.)

Published on

Study of two ecogeographic groups of rice indicated larger embryo weight and length in
japonicas than in indicas. Genetic variation is higher for embryo weight and
embryo/endosperm weight and moderate for embryo length. Embryo weight correlated
strongly with embryo length, kernel breadth and kernel thickness in two ecogeographic
groups. Embryo length can be used to evaluate breeding materials for embryo size. In
indicas, embryo weight and length correlated with seed and seedling vigour as measured
by response to ageing stress, shoot length, root length and seedling dry matter. Both
additive and nonadditive gene effects with preponderance of the former governed the
inheritance of embryo length. Average dominance over all the loci across all parents was
within the range of incomplete dominance. Combining ability also confirmed
preponderance of additive gene effects in the inheritance of embryo size. Heritability
estimates in narrow sense were very high.
 

Keywords: Oryza sativa rice, embryo size, genetic variation, seed vigour, inheritance.

Info

Year: 1994
Volume: 54
Issue: 3
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

Authors

info_circle

Download PDF