Detection of grain yield QTLs in the durum population Lahn/Chaml tested in contrasting environments

Authors : Issame FAROUK, Ahmad ALSALEH, Jihan MOTOWAJ, Fatima GABOUN, Bouchra BELKADİ, Abdelkarim FİLALİ MALTOUF, Zakaria KEHEL, Ismahane ELOUAFİ, Nasserelhaq NSARELLAH, M Miloudi NACHİT

Pages : 65-78

View : 20 | Download : 10

Publication Date : 2021-12-01

Article Type : Research Paper

Abstract :Durum wheat insert ignore into journalissuearticles values(Triticum turgidum L. var durum); is tetraploid wheat insert ignore into journalissuearticles values(AABB);; it is the main source of semolina and other pasta products. Grain yield in wheat is quantitatively inherited and influenced by the environment. The genetic map construction constitutes the essential step in identifying quantitative trait loci insert ignore into journalissuearticles values(QTLs); linked to complex traits, such as grain yield. The study aimed to construct a genetic linkage map of two parents that are widely grown durum cultivars insert ignore into journalissuearticles values(Lahn and Chaml); in the Mediterranean basin, which is characterized by varying climate changes. The genetic linkage map of Lahn/Chaml population consisted of 112 recombinant inbred lines insert ignore into journalissuearticles values(RILs); and was used to determine QTLs linked to the grain yield in 11 contrasting environments insert ignore into journalissuearticles values(favorable, cold, dry, and hot);. Simple sequence repeat insert ignore into journalissuearticles values(SSR); molecular markers were used to construct an anchor map, which was later enriched with single nucleotide polymorphisms insert ignore into journalissuearticles values(SNPs);. The map was constructed with 247 SSRs and enriched with 1425 SNPs. The map covered 6122.22 cM. One hundred and twenty-six QTLs were detected on different chromosomes. Chromosomes 2A and 4B harbored the most significant grain yield QTLs. Furthermore, by comparison with several wheat mapping populations, all the A and B chromosomes of Lahn/Cham 1 QTLs contributed to grain yield. The results showed that the detected QTLs can be used as a potential candidate for marker-assisted selection in durum breeding programs.
Keywords : Molecular markers, grain yield, genetic linkage map, SNP, QTL