Genetic Variability Estimation and Frequency of Superior Progenies in Advance Breeding lines in desi cotton at two locations

Bangaremma Wadeyar,T Kajjidoni

doi:10.12944/cwe.10.1.39

Abstract

Two hundred and two progenies were evaluated at two locations viz., Agricultural Research Station, Annigeri and Main Agricultural Research Station, Dharwad to estimate genetic variability and to identify superior progenies for seed cotton yield, yield contributing and fibre quality traits. The analysis of variance revealed presence of sufficient variability in the material for seven traits at both locations. High phenotypic coefficient of variation (PCV) and genotypic coefficient of variation (GCV) were recorded for number of bolls per plant and seed cotton yield per plant, while, moderate variability estimate was recorded for plant height and low PCV and GCV were noticed for boll weight, ginning out turn, seed index and lint index traits at both the locations. High heritability was observed for seed index exhibited 97 per cent with moderate genetic advance as percent mean (GAM) at both the locations. High GAM was observed for number of bolls per plant, seed cotton yield and plant height. Moderate GAM was noticed for boll weight and seed index traits at both locations. An attempt was made to identify superior progenies, maximum number of superior progenies were observed for seed cotton yield at Dharwad (33 progenies) followed by Annigeri (24 progenies).

Highlights

Cotton, popularly referred as “White Gold”, is an important fibre crop of global importance, cultivated in tropical and sub-tropical regions of more than seventy countries
High phenotypic coefficient of variation (PCV), genotypic coefficient of variation (GCV), heritability, GA and genetic advance as percent mean (GAM) were recorded at both the test locations, while comparatively higher values were observed at Annigeri location for all the above mentioned genetic parameters
These difference may be due to the environment and weather conditions which suits for desi cotton at Annigeri location which favor overall expression of seed cotton yield and this location comes under a traditional area for cultivation of herbaceum cotton

Summary

Introduction

Popularly referred as “White Gold”, is an important fibre crop of global importance, cultivated in tropical and sub-tropical regions of more than seventy countries. Global production of cotton is 26.14 million tons of which India contributes 8.5 million tons amounting to 32.5 per cent world share. India is the second highest producer of cotton (lint) next to china. The area under cotton during 2012-13 in India was 11.978 lakh hectare with production and productivity of 365 lakh bales and 518 kg lint per hectare respectively and in the same year in Karnataka, cotton was grown over an area of 4.85 lakh hectare with a production of 15.00 lakh bales and productivity of 526 kg/ha Selection is effective only when there is enough magnitude of variability in the breeding population. The present investigation was carried out with 202 G. herbaceum progeny lines to estimate their per se performance, variability, heritability and genetic advance on the genetic architecture of seven seed cotton yield and yield traits

Materials and Methods

Results and Discussion

CONCLUSION