?HETEROSIS STUDIES IN INTRASPECIFIC CROSSES OF GOSSYPIUM HIRSUTUM L.

Abstract

Studies on heterosis were carried out in five intraspecific hybrids of tetraploid cotton Gossypium hirsutum L. All
hybrids manifested positive heterosis over mid-parent and control variety Qalandri regarding yield per plant. The
extent of heterosis recorded was 60.2% and 94.3% over mid-parent and check variety Qalandri respectively. For boll
weight the heterosis ranged from -1.52 to + 49.5%, for plant height from -7.40 to + 39.22%, for sympodia per plant
from + 0.99 to + 2.70% and for staple length from + 1.82 to + 4.0%.