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GENETIC ANALYSIS FOR COLD AND HEAT TOLERANCE IN RICE (Oryza sativa L.)

KrishiKosh

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Title GENETIC ANALYSIS FOR COLD AND HEAT TOLERANCE IN RICE (Oryza sativa L.)
M.Sc. Genetic and Plant Breeding
 
Creator Kanwar, Mithlesh Kumar
 
Contributor Verma, R.K.
 
Subject Plant Breeding and Genetics, Heat and Cold tolerance, Correlation Path
 
Description Observation recorded 42 characters early plant vigour bassal leaf sheath colour, ligules color, ligules shape, collar color, auricle color, internode color,
flag leaf angle, panicle excertion, panicle type, stigma color, awning, sterile lemma
color, hull color, seed coat color, threshability, aroma, days to 50% flowering,
plant height, effective tiller per plant, panicle length, leaf length, leaf width, filled
grains per panicle, unfilled grains per panicle, spikelet fertility percentage, spikelet
sterility percentage, 100 grains weight, yield per plant, hulling percentage, milling
percentage, kernel length, kernel breadth, kernel length breadth ratio, cooked
kernel length, cooked kernel breadth, cooked kernel length breadth ratio,
elongation ratio, elongation index and head rice recovery percentage.

For screening of rice genotypes against cold temperature stress the
genotypes which showed good performance are IR 11C115 followed by IR
11C134, IR 65199-4B-19-1-1, IR 72046-B-R-3-2-1, IR 74099-3R-5-1 and for high
temperature stress, spikelet fertility is a more powerful indicator for screening at
the reproductive stage than other stages. Based on spikelet fertility percentage
genotypes viz. IR 10C112, IR 11C114, IR 11C115, IR 11C120, IR 11C128, IR
11C170, IR 65199-4B-19-1-1, IR 70868-B-P-11-3, IR 70865-B-P-6-2, IR 71895-
3R-26-2-1-2B-2, IR 74099-3R-5-1, IR 11C173, Poornima (LC), N-22 and IR
10C146 performed better under high temperature. The performance of rice
genotype were evaluated through spikelet fertility percentage which ranged from
80.45% (IR 65199-4B-19-1-1) to 95.04% (IR 74099-3R-5-1) by comparing the
date of flowering 21th April with maximum temperature 42℃.
The analysis of variance indicated that the mean sum of squares due to
replication were significant for days to 50% flowering, plant height, effective tiller
per plant, panicle length, leaf length, leaf width and kernel breadth. The mean sum
of squares due to genotypes were highly significant for most of the characters
studied.

The high genotypic and phenotypic coefficient of variation were recorded
for filled grains per panicle followed by spikelet fertility percentage. Highest
heritability was recorded for panicle length followed by days to 50 % flowering,
head rice recovery, leaf length and effective tillers per plant. The highest genetic
 
Date 2016-08-08T15:50:27Z
2016-08-08T15:50:27Z
2016
 
Type Thesis
 
Identifier 120p.
http://krishikosh.egranth.ac.in/handle/1/71614
 
Language en
 
Format application/pdf
 
Publisher Indirra Gandhi Krishi Vishwavidyalaya Raipur