1. A major QTL for gluten strength in durum wheat (Triticum turgidum L. var. durum)
- Author
-
Kumar, Ajay, Elias, Elias M., Ghavami, Farhad, Xu, Xin, Jain, Shalu, Manthey, Frank A., Mergoum, Mohamed, Alamri, Mohammed S., Kianian, Penny M.A., and Kianian, Shahryar F.
- Subjects
- *
GLUTEN , *DURUM wheat , *HAPLOIDY , *PHENOTYPES ,WHEAT genetics - Abstract
Abstract: Gluten strength is an important characteristic, determining the end product quality of durum wheat semolina. To identify the genetic basis of gluten strength in North Dakota durum cultivars, a doubled haploid population was developed from the cross of a weak gluten cultivar ‘Rugby’ and a strong gluten cultivar ‘Maier’. A framework linkage map consisting of 228 markers was constructed and used with phenotypic data on gluten strength (measured by sedimentation volume) to conduct single- and two-locus QTL analyses. Only one consistent QTL (QGs.ndsu-1B) contributing up to 90% of the phenotypic or 93% of the genotypic variation was detected on 1BS. No QTL × QTL or QTL × environment interactions were observed. The QGs.ndsu-1B was flanked by two DArT markers which were converted to STS markers and used along with SSR and EST-SSRs to develop a map of 1BS. QTL analysis delineated QGs.ndsu-1B in a 7.3 cM region flanked by an STS marker (STS-wPt2395) and a SSR marker (wmc85). The adapted background of this material and availability of PCR-based markers closely associated with this locus represent invaluable resources for marker-assisted introgression of gluten strength into other durum wheat varieties. A single QTL segregating in this population also makes it an ideal target for map-based cloning. [Copyright &y& Elsevier]
- Published
- 2013
- Full Text
- View/download PDF