Vol. 8 (2) : March-April 2017 issue
Green Farming Vol. 8 (2) : 322-325 ; March-April, 2017
Estimation of genetic diversity for grain yield & its component traits in restorer lines of rice (Oryza sativa L.)
P. RAVI YUGANDHARa1*, D.V. DAHATa2, K.K. BARAHTEa3 and SUNEETHA KOTAb4
aDivision of Agricultural Botany, College of Agriculture, Pune (Affiliate MPKV, Rahuri) - 411 005 (Maharashtra)
bCrop Improvement Section, Indian Institute of Rice Research, Rajendranagar, Hyderabad - 500 030 (Telangana)
Designation : 1Ph.D. Scholar *(raviyugandhar@gmail.com), 2,3Asstt. Professor, 4Scientist
Subject : Crop Genetics and Plant Breeding
Paper No. : P-5406
Total Pages : 4
Received : 27 June 2016
Revised accepted : 28 January 2017
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Citation :
P. RAVI YUGANDHAR, D.V. DAHAT, K.K. BARAHTE and SUNEETHA KOTA. 2017. Estimation of genetic diversity for grain yield & its component traits in restorer lines of rice (Oryza sativa L.). Green Farming Vol. 8 (2) : 322-325 ; March-April, 2017
ABSTRACT
The present investigation was carried out with the objective to know the extent of genetic divergence among 50 restorer lines of rice for yield and yield contributing characters by following Mahalanobis (1936) D2 analysis which revealed presence of substantial amount of genetic diversity among the genotypes. Based on the relative magnitude of D2 values, the experimental material was distributed into eight clusters. Out of eight clusters, cluster III was the largest comprising of twenty two restorer lines. The variance and the percent contribution to divergence was much higher for test weight (40.57%) followed by harvest index (16.97%). A wide range of variation was observed in cluster means for all the traits under study. Maximum intra cluster distance was observed in cluster VIII (477.729). Maximum inter cluster distance was exhibited between clusters IV and V (787.816) followed by clusters IV and VII (778.629).
Key words :
Clusters, Cluster means, D2 analysis, Genetic diversity, Hybrid rice, Restorer line.
