AI Article Synopsis
- Durum wheat (L. var durum) is a key source of semolina and pasta, and grain yield is influenced by both genetics and the environment.
- The study focused on creating a genetic linkage map using two widely grown durum cultivars (Lahn and Cham1) to identify quantitative trait loci (QTLs) associated with grain yield in various conditions.
- A total of 126 QTLs were identified, particularly on chromosomes 2A and 4B, suggesting these can be targeted for marker-assisted selection in durum wheat breeding.
Article Abstract
Durum wheat ( L. var durum) is tetraploid wheat (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 (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 (Lahn and Cham1) in the Mediterranean basin, which is characterized by varying climate changes. The genetic linkage map of Lahn/Cham1 population consisted of 112 recombinant inbred lines (RILs) and was used to determine QTLs linked to the grain yield in 11 contrasting environments (favorable, cold, dry, and hot). Simple sequence repeat (SSR) molecular markers were used to construct an anchor map, which was later enriched with single nucleotide polymorphisms (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/Cham1 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.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7877719 | PMC |
| http://dx.doi.org/10.3906/biy-2008-41 | DOI Listing |
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