Genetic variability predicting breeding potential of upland cotton(Gossypium hirsutum L.)for high temperature tolerance

作     者：FAROOQ Amjad SHAKEEL Amir SAEED Asif FAROOQ Jehanzeb RIZWAN Muhammad CHATTHA Waqas Shafqat SARWAR Ghulam RAMZAN Yasir FAROOQ Amjad;SHAKEEL Amir;SAEED Asif;FAROOQ Jehanzeb;RIZWAN Muhammad;CHATTHA Waqas Shafqat;SARWAR Ghulam;RAMZAN Yasir

作者机构：Cotton Research StationAyub Agricultural Research InstituteFaisalabad 38000Pakistan Department of Plant Breeding and GeneticsUniversity of AgricultureFaisalabad 38040Pakistan 

出 版 物：《Journal of Cotton Research》 (棉花研究（英文）)

年 卷 期：2023年第6卷第2期

页      面：81-97页

学科分类：0710[理学-生物学] 0831[工学-生物医学工程（可授工学、理学、医学学位）] 1203[管理学-农林经济管理] 09[农学] 0903[农学-农业资源与环境] 0901[农学-作物学] 0836[工学-生物工程] 0713[理学-生态学] 

基　　金：Higher Education Commission of Pakistan for funding the experiments 

主　　题：High temperature Upland cotton Peak flowering Heterosis Gene action Combining ability 

摘      要：Background High temperature stress at peak flowering stage of cotton is a major hindrance for crop *** study aimed to increase genetic divergence regarding heat tolerance in newly developed cultivars and *** cotton genotypes and 40 F1(hybrids)were tested under field conditions following the treatments,viz.,high temperature stress and control at peak flowering stage in August and October under April and June sowing,*** The mean squares revealed significant differences among genotypes,treatments,genotype×treatment for relative cell injury,chlorophyll contents,canopy temperature,boll retention and seed cotton yield per *** genetic diversity among 50 genotypes was analyzed through cluster analysis and heat susceptibility index(HSI).The heat tolerant genotypes including FH-Noor,NIAB-545,FH-466,FH-Lalazar,FH-458,NIAB-878,IR-NIBGE-8,Weal-AGShahkar,and heat sensitive,i.e.,CIM-602,Silky-3,FH-326,SLH-12 and FH-442 were hybridized in line×tester fashion to produce F1 *** breeding materials’populations(40 F1)revealed higher specific combining ability variances along with dominance variances,decided the non-additive type gene action for all the *** best general combining ability effects for most of the traits were displayed by the lines,i.e.,FH-Lalazar,NIAB-878 along with testers FH-326 and *** combining ability effects and better-parent heterosis were showed by the crosses,viz.,FH-Lalazar×Silky-3,FH-Lalazar×FH-326,NIAB-878×Silky-3,and NIAB-878×FH-326 for seed cotton yield and yield contributing traits under high temperature *** Heterosis breeding should be carried out in the presence of non-additive type gene action for all the studied *** best combiner parents with better-parent heterosis may be used in crossing program to develop high yielding cultivars,and hybrids for high temperature stress tolerance.