GENETIC VARIATION FOR GRAIN QUALITY, PROTEIN AND MICRONUTRIENTS IN F2 GENERATION OF BFT 5204 x HPR 14 IN RICE {Oryza sativa L.) UNDER AEROBIC CONDITION
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Date
2008-08-18
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University of Agricultural Sciences GKVK, Banglore
Abstract
A study was undertaken in F2 generation of cross BPT 5204 x HPR 14
to assess genetic variation for plant morphological traits, grain characters,
protein and micronutrient content and to understand the interrelationship
among developmental traits and grain characters. High PCV and GCV were
recorded for number of productive tillers, grain weight, test weight, zinc,
manganese and iron. Plant height, number of productive tillers, length/breadth
ratio of paddy grain, test weight, protein content and all nutrients studied
recorded high heritability and genetic advance. High heritability with low
genetic advance was recorded for days to maturity. Significant positive
correlation of plant height was observed with number of productive tillers and
days to maturity. Days to 50% flowering had positive significant association
with grain weight. Days to maturity showed positive significant association
with panicle length. Rice kernel length showed positive significant association
with rice kernel length/breadth ratio and kernel elongation ratio, while negative
significant association was seen with rice kernel breadth. Test weight had
positive significant correlation with breadth of paddy grain and rice kernel
breadth, while it was negatively associated with length/breadth ratio of paddy
grain. Breadth of paddy grain followed by kernel elongation ratio and rice
kernel breadth had high positive direct effect on test weight whereas
length/breadth ratio of paddy grain had high negative direct effect on test
weight.
Among the segregants studied B-24-7, A-30-1, B-24-1, B-1-1 land
C-22-13, were superior for many traits. Highest protein (20.59%), copper
(27.78 ppm). Zinc (37.8 ppm), manganese (96 ppm) and iron (659.4 ppm) was
observed in C-23-13, B-32-12, A-26-9, D-25-2 and D-26-2 respectively.
Longest rice grains (6.4 mm) were observed in B-24-7, while D-18-3, D-19-1
and D-14-3 were high yielders.
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