Stability analysis for Yield and Quality Components in Transplanted and Direct Seeded Rice (Oryza sativa L.)
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Date
2019
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CCSHAU
Abstract
The present study entitled “Stability analysis for yield and quality components in transplanted
and direct seeded rice (Oryza sativa L.)” was undertaken to estimate genetic parameters and to study
stability of various trait. The material for the present investigation comprised of thirty genotypes (15
scented and 15 non-scented) grown in twelve environment under two production system i.e., direct
seeded and transplanted rice were carried out during the kharif seasons in the year 2016 and 2017 in a
randomized block design (RBD) at Rice Research Station, Kaul (Kaithal). The observations on five
randomly selected plants from each replication in each environment were recorded for days 50 %
flowering, days to maturity, plant height (cm), number of tillers per plant, panicle length (cm), number
of grains per panicle, thousand grain weight (g), biological yield per plant (g), grain yield per plant (g),
harvest index (%). For physical quality traits such as hulling (%), milling (%) and head rice recovery
(%), a sample of 25 g was used. Cooking quality traits such as kernel length before cooking, kernel
breadth before cooking, length breadth ratio before cooking, kernel length after cooking, kernel breadth
after cooking, length breadth ratio after cooking and elongation ratio data were taken on ten polished
grains for each quality traits. On the basis of mean performance the genotype IR 93928-195-2-1-1, IR
93835-90-3-2-1, HKR 48 and HKR 12-411 were found for early flowering and maturity and grain yield
were almost similar in DSR, TPR and pooled over the environments. High estimates of PCV and GCV
were recorded for number of tillers per plant, number of grains per panicle, grain yield per plant,
harvest index and elongation. High heritability estimates alongwith high genetic advance as percent of
mean was observed for number of tillers per plant, number of grains per panicle, days to flowering,
harvest index, elongation ratio. Grain yield per plant had moderate heritability coupled with high
genetic advance as per cent of mean. The genotypes HKR 12-1, HKR 07-147, IR 91648-B-89-B-14-2,
IR 93928-195-2-1-1, IR 91648-B-2-38-B-1-2 and PUSA 1718-14-2-150 were found below average
stable for grain yield in direct seeded rice. The genotype HKR 07-147 and IR 91648-B-2-38-B-1-2
were found suitable for grain yield for favourable environment under direct seeded, transplanted and
pooled over the environments. The estimation of environmental index revealed that environment ten
(E10) was found most suitable for panicle length, grain yield per plant, biological yield per plant,
number of grains per panicle, hulling (%) and kernel length before cooking under direct seeded,
transplanted rice and pooled over the environments.
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