PLANT PRODUCTIVITY AND ECONOMIC VALUABLE TRAITS IN MEDIUM FIBER COTTON LINES UNDER DIFFERENT WATER SUPPLY CONDITIONS

Abstract

The article presents the economically valuable traits of a number of medium fiber cotton breeding lines under conditions of optimal water supply and with water deficiency. In the medium fiber cotton lines, under water deficiency, plant productivity decreased from 15.55 to 38.5% compared to the control (optimal water regime). Relatively high productivity and plant resistance under these stress conditions were noted in the T-22, T-11, T-15, and T-7 lines. These lines can be used as initial material for breeding medium fiber cotton for drought resistance. Line T 7 showed a low adaptation coefficient (Kada.=-35.2) due to very high productivity (101.1 g) under optimal water supply, the plant yield was 65.5 g. The weight of boll and the yield of fiber decreased to varying degrees with water deficiency in medium fiber cotton lines. At the same time, the yield of fiber in the T-11, T-16, and T-3 lines was 37.1–38.2%.