Green Farming
Bi-monthly Journal
NAAS RATING : 4.38
UGC Approved Jr.No. : 45500
ISSN 0974-0775
GLOBAL IMPACT FACTOR:0.468[2016]
International Journal of Applied Agricultural & Horticultural Sciences
  • 18 February, 2018
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Vol. 9 (1) : January-February 2018 issue
Green Farming Vol. 9 (1) : 14-17 ; January-February, 2018
Genetic variability and correlation studies for yield and yield related traits in rice
IRAPPA B.M.1, LAKSHMANA D.2* and CHANDANA B.C.3
Deptt. of Genetics & Plant Breeding, College of Horticulture (UAHS, Shivamogga) Mudigere - 577 132 (Karnataka)
Designation :  
1P.G. Student, 2Professor & Head *(lakshmanad@rediffmail.com),
3Asstt. Professor (Contract)
Subject : Crop Genetics and Plant Breeding
Paper No. : P-7142
Total Pages : 4
Received : 12 January 2018
Revised accepted : 20 January 2018
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Citation :

IRAPPA B.M., LAKSHMANA D. and CHANDANA B.C. 2018. Genetic variability and correlation studies for yield and yield related traits in rice. Green Farming  Vol. 9 (1) : 14-17  ;  January-February, 2018

ABSTRACT
Analysis of variance revealed highly significant mean sum of squares due to germplasm for all traits except for panicle length, number of tillers per plant and number of productive tillers per plant. Phenotypic coefficients of variability (PCV) for all yield attributing traits was higher than genotypic coefficients of variability (GCV). However, the difference between PCV and GCV values were less for these characters, indicated low environmental influence and predominance of genetic factor controlling variability in these traits. High PCV and GCV values observed for panicle exertion, number of spikelets per panicle and number of grains per panicle. Whereas, plant height, 1000 grain weight, L/B ratio and grain yield per plant exhibited average PCV and GCV values. The traits like plant height, panicle exertion, number of spikelet per panicle, number of grains per panicle, test weight, L/B ratio and grain yield per plant exhibited high heritability coupled with high predicted genetic advance. High values of PCV, GCV coupled with high heritability and genetic advance as per cent of the meanwas observed for panicle exertion, the number of spikelets per panicle and number of grains per panicle. Highly significant positive correlation of grain yield was observed with days to 50 per cent flowering, days to maturity, plant height and test weight at both genotypic and phenotypic level. On the contrary, most of the characters had a significant and positive correlation with spikelets per panicle at phenotypic level and with the number of grains per panicle at the phenotypic level.
Key words :
Coefficient of variation, GCV, Genetic advance, Heritability, PCV, Yield attributes.