Studies on genetic variability analysis in rice (Oryza sativa L.) under saline-alkaline condition
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Date
2015-06-24
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ANDUAT, Kumarganj, Ayodhya
Abstract
The present investigation entitled “Studies on genetic variability analysis
in rice (Oryza sativa L.) under saline- alkaline condition” was conducted at
Genetics and Plant Breeding Research Farm, Narendra Deva University of
Agriculture and Technology, Kumarganj, Faizabad under saline-alkaline soil
condition (8.9 pH=8.9; EC=2.45dSm-1; ESP=44%) during Kharif 2014. The
experimental materials consisted of eighty germplasm and four checks viz., CSR
10, Jaya, Narendra Usar 3 and Swarna Sub 1. These genotypes exhibited wide
spectrum of variability for various agronomical and morphological characters.
The experiment was conducted in Augmented Block Design having eight blocks
of fourteen plots in each block. Each plot consisted of single row of 3 meter
length with the spacing between rows and within plants 20 cm and 15 cm,
respectively. The characters studied were days to 50% flowering, flag leaf area
(cm2), plant height (cm), panicle bearing tillers per plant, panicle length (cm),
spikelets per panicle, spikelet fertility (%), 1000-grain weight (g), grains per
panicle, L/B ratio, biological yield per plant (g), harvest index (%) and grain
yield per plant (g). The data recorded on these characters was utilized for
estimation of mean, range, variance, correlations, path-coefficients and genetic
divergence. The salient findings of the study and conclusion drawn are
summarized below:
The most promising lines showing highest seed yield with high mean
performance for yield contributing traits were identified.
1. The genotype NDRK 5064, IR 83439-4-B-11-3-2-1-AJY1-3-B, NDRK
5014, NDRK 5075, A 69-1, NDRK 5008, NDRK 5019 and NDRK 5005
produced high grain yield per plan; IR 45427-2B-2-2B-1-1, NDR 507 and
NDRK 50039 for early days to 50 per cent flowering; Narendra 6029, IR
45427-2B-2-2B-1-1 and NDRK 50039 for greater flag leaf area; NDR 507,
IR 85920-1-1-2-1-AJY1-2B and FL 478 for short stature; NDRK 50047,
NDRK 5059 and NDRK 5064for highest panicle bearing tillers per plant;
NDRK 50039, NDRK 5095 and NDRK 5067 for longer panicle length
(cm); Vikas, NDRK 5064 and NDRK 5014 for spikelets per panicle;
NDRK 5082, NDRK 5015 and NDRK 50047 for spikelet fertility (%); IR
83439-4-B-11-3-2-1-AJY1-3-B, NDRK 5095 and CSR 36for biological
yield per plant (g); NDRK 5088, IR 76397-28-6-1-1-1-1 and NDRK
5019for harvest index (%); NDRK 5017,
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