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Two‐year study on combining ability and heterotic potential in functional traits under salt stress in upland cotton (Gossypium hirsutum)
Author(s) -
Farooq Muhammad Awais,
Shakeel Amir,
Chattha Waqas Shafqat,
Tahir Muhammad
Publication year - 2020
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12877
Subject(s) - biology , heterosis , gossypium hirsutum , point of delivery , quantitative trait locus , gossypium , trait , salt (chemistry) , agronomy , gene , botany , horticulture , microbiology and biotechnology , hybrid , genetics , chemistry , computer science , programming language
Abstract Salt tolerance is a physiologically and genetically complex trait controlled by multiple genes. To analyze the genetic basis of salt tolerance we evaluated 18 F 1 along with their nine parents under three salt stress levels i.e. control, 10 dS m −1 and 15 dS m −1 in the summer of 2017 and 2018. Data were recorded for the number of bolls, seed cotton yield, boll weight, Na + , K + , K + /Na + ratio, H 2 O 2 , SOD, POD, CAT and TSP. Line × tester analysis indicated that the contribution of lines was greater than testers. Except for Na + , most of the traits were controlled by non‐additive genes. With the rise of salt stress, SCA variances increased and were higher than GCA variances for most of the traits indicating the traits were controlled by a few largely dominant genes. KEHKSHAN, FH‐118 and FH‐114 were found good general combiner whereas the cross KEHKSHAN × FH‐114 was a good specific combiner and also indicated significant better parent heterosis for most traits during two years under salt stress and can be utilized in a breeding programme for salt tolerance.