PJB-2005-46
STABILITY OF COTTON CULTIVARS FOR EARLY CROP MATURITY ACROSS VARIABLE PLANT SPACING AND SOWING TIMES
M. KAUSAR NAWAZ SHAH*, SAEED A. MALIK**, MUHAMMAD SALEEM
Abstract
Earliness of crop maturity being a complex trait in cotton is significantly altered by a number of agronomic practices including inter plant spacing and sowing time thus making identification of true early maturing cultivars a difficult task under field conditions. In this study, cotton cultivars were subjected to twelve environments provided through three plant spacings, two sowing dates over two years to assess phenotypic stability for earliness index. The stability parameters were calculated following Eberhart & Russell. Stability analysis revealed presence of genetic differences among cultivars for earliness index. Significant cultivar X environment (linear) indicated differential response of cultivars to various environments for earliness index. Cotton cultivars 15/2S and Krishna showing near unity (
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