Heterosis and combining ability estimates through line × tester analysis in inter-specific hybrids of cotton (G. hirsutum L. × G. barbadense L.)

  • B. Balakrishna*, V. Chenga Reddy and M. Lal Ahamed ACHARYA N G RANGA AGRICULTURAL UNIVERSITY, Agricultural College, Bapatla-522 101
Keywords: Cotton, inter-specific hybrids, line × tester analysis, heterosis, combining ability

Abstract

The present investigation comprised of seventy two inter-specific hybrids obtained by mating twelve diverse lines of G. hirsutum and five testers of G. barbadense in line × tester fashion and were evaluated to study standard heterosis and combining ability for seed cotton yield and its component traits. Combining ability analysis indicated the preponderance of non-additive gene action for all the traits. The lines, L 762, MR 786, BS 37, NDLH 1938 and H 1442 and the testers, DB 16, DB 11 and GSB 41were found to be good general combiners for seed cotton yield plant-1 and its component characters. The hybrid, L 1058 × TCB 37 exhibited high and significant positive sca effect for seed cotton yield plant-1 and its contributing traits viz., number of bolls plant-1, boll weight and seed index. The cross combinations, L 762 × TCB 37, H 1442 × DB 16 and H 1442 × GSB 41 registered high and significant positive heterosis over both the standard checks for seed cotton yield plant-1. The cross combinations which are showing high standard heterosis and sca effects may be recommended for commercial cultivation after testing their stable performance for seed cotton yield.

Author Biography

B. Balakrishna*, V. Chenga Reddy and M. Lal Ahamed, ACHARYA N G RANGA AGRICULTURAL UNIVERSITY, Agricultural College, Bapatla-522 101
GENETICS AND PLANT BREEDING
Published
01-07-2017
Section
Research Article