Genetic effects conferring heat tolerance in upland cotton(Gossypium hirsutum L.)

作     者：SALMAN Muhammad ZIA Zia Ullah RANA Iqrar Ahmad MAQSOOD Rana Haroon AHMAD Saghir BAKHSH Ali AZHAR Muhammad Tehseen 

作者机构：Department of Plant Breeding & Genetics University of Agriculture FaisalabadPakistan Cotton Research Institute Multan Pakistan Centre of Agricultural Biochemistry and Biotechnology University of Agriculture Faisalabad Pakistan Department of Plant Breeding & Genetics Ghazi University DG Khan Pakistan 

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

年 卷 期：2019年第2卷第1期

页      面：56-63页

学科分类：09[农学] 

基　　金：funding for this research was provided by Higher Education Commission Pakistan 

主　　题：Heat stress Heritability Heterosis Relative cell injury Upland cotton 

摘      要：Background:Climate change and particularly global warming has emerged as an alarming threat to the crop productivity of field crops and exerted drastic effects on the cropping *** of cotton has been dropped down to one million bales from 1.4 million bales since 2015 in Pakistan due to the increase in temperature at critical growth stages,i.e.,flowering and boll *** in view the importance of cotton in the country,this study was conducted to investigate the genetic effects conferring heat tolerance in six populations(P1,P2,F1,F2,BC1 and BC2)developed from cross-1 and cross-2,i.e.,VH-282×FH-142 and DNH-40×***:The results revealed that cross-1 performed better in heat stress as compared with cross-2 for majority of the traits *** weight and ginning outturn(GO-T)were highly effected under heat stress and had negative correlation with Relative cell injury(RCI).Boll weight,fiber length,fiber strength and fiber fineness were under the control of non-additive gene action,whereas RCI was controlled by additive gene *** values of genetic advance coupled with higher values of broad sense heritability for these traits except RCI confirmed the role of non-additive genetic *** types of epistasis were recorded for fiber strength in cross-1 in normal ***,complementary type of non-allelic interaction was recorded for fiber strength under normal condition,fiber fineness and RCI under heat stressed condition in ***,boll weight,GOT and fiber length in populations derived from cross-2 in normal condition were also under the influence of complementary type of non-allelic *** differences among values of mid parent and better parent heterosis for boll weight in both normal and heat stress condition provided the opportunity to cotton breeders for utilization of this germplasm for improvement of this trait through exploitation of heterosis ***:Cross-1 perfo