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Genetic diversity for high- and low-molecular weight glutenin subunits in local and commercial bread wheat cultivars released since 1951 in Iran: I- Irrigated | ||
| Crop Breeding Journal | ||
| مقاله 1، دوره 7، شماره 2، بهمن 2017، صفحه 1-7 اصل مقاله (403.62 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22092/cbj.2018.115186.1011 | ||
| نویسندگان | ||
| M. Esmaeilzadeh Moghaddam* 1؛ M. R. Jalal Kamali2؛ R. J. Pena3؛ G. Najafian4 | ||
| 1Seed and Plant Improvement Institute, Karaj, Iran. | ||
| 2International Maize and Wheat Improvement Center | ||
| 3International Maize and Wheat Improvement Center (CIMMYT) | ||
| 4Seed and Plant Improvement Institute,Agricultural Research, Education and Extension Organization, Karaj, Iran | ||
| چکیده | ||
| Allelic variations at the Glu-1 and Glu-3 loci play an important role in determining dough visco-elastic properties and bread making quality. Fifty-nine bread wheat cultivars released in Iran since 1951 from four different agro-climate zones, were examined for their high (HMW-GS) and low-molecular-weight glutenin subunit (LMW-GS) composition, controlled at the Glu-1 and Glu-3 loci, respectively. In addition, the presence of the 1B.1R translocation was investigated. Three, eight, and four allelic variations were present at Glu-A1, Glu-B1, and Glu-D1 loci, respectively. Subunits 2*, 7+8, 7+9, and 2+12 are the dominant HMW-GS, at Glu-A1, Glu-B1, and Glu-D1, with frequencies of 45.8, 39, 25.4, and 59.3%, respectively. Five, eight and four allelic variations were present at the Glu-A3, Glu-B3 and Glu-D3 loci, with Glu-A3c, Glu-B3b and Glu-D3b LMW-GS dominating, with frequencies of 52.5, 39 and 59.3%, respectively. The frequencies of allelic variation at Glu-1 and Glu-3 differ greatly in different regions. Among the 59 cultivars/varieties examined in this study, four genotypes were local varieties (6.8%), 27 (45.8%) bred in the national breeding program and 28 (47.4%) originated from international nurseries. The average quality scores based on HMW-GS for local varieties, genotypes from the national breeding program and international nurseries were 5.5, 7.6 and 7.7 respectively. It was concluded that integration of desirable subunits at Glu-1 such as 1, 7+8, 5+10, must be used as the core focus of the breeding program, which could lead to the improvement of gluten quality in Iranian bread wheat cultivars. | ||
| کلیدواژه‌ها | ||
| Glutenin؛ allelic variation؛ SDS-PAGE؛ Triticum aestivum | ||
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