GENETIC VARIABILITY STUDIES AND MULTIVARIATE ANALYSIS IN F2 SEGREGATING POPULATIONS INVOLVING MEDICINAL RICE (Oryza sativa L.) CULTIVAR KAVUNI

SUVARNA RANI CHIMMILI¹*, C.R. ANANDAKUMAR², M. RAVEENDRAN³, K.S. SUBRAMANIAN⁴, S. ROBIN^5
1Department of Rice, Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, 641003
²Department of Rice, Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, 641003
³Department of Rice, Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, 641003
⁴Department of Rice, Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, 641003
⁵Department of Rice, Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, 641003
* Corresponding Author : suvarna.1412@gmail.com

Received : 05-05-2016     Accepted : 23-05-2016     Published : 12-09-2016
Volume : 8     Issue : 35       Pages : 1733 - 1735
Int J Agr Sci 8.35 (2016):1733-1735

Keywords : Rice, Descriptive statistics, Genetic variability, Heritability, Genetic advance, Skewness and Kurtosis
Academic Editor : Dr. Bhagawan Bharali
Conflict of Interest : None declared
Acknowledgements/Funding : None declared
Author Contribution : None declared

In order to evaluate the relationship between morphological characters in rice cultivars, two populations at F2 generation were examined. Statistical analysis on fifteen biometrical or quantitative characters were studied for estimating descriptive statistics, genotypic coefficient of variation (GCV), phenotypic coefficient of variation (PCV), genetic advance and heritability (Broad sense). Maximum standard deviation for total number of spikelets per panicle and total number of filled grains per panicle were recorded for both the crosses. Highest PCV and GCV was observed for panicle exsertion, total number of filled grains per panicle in ASD 16 x Kavuni (Cross I) and productive tiller in Swarna Sub 1x Kavuni (Cross II). Difference between GCV and PCV was low in most of the characters studied. High estimates of heritability and genetic advance were observed for flag leaf width for both the crosses. Both positive and negative skewness was observed for different traits, while platykurtic distribution was observed for most of the traits in F2 populations of two crosses.