Genetic Characteristic of High Molecular Weight Glutenin Subunits in Somatic Hybrid Wheat Lines-Potential Application to Wheat Breeding
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- 作者：Liu Heng ; Shi Lei ; Zhao Junsheng ; and Xia Guangmin
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2006
- 出版时间：July 12, 2006
- 年：2006
- 卷：54
- 期：14
- 页码：5007 - 5013
- 全文大小：596K
- 年卷期：v.54,no.14(July 12, 2006)
- ISSN：1520-5118
文摘
Analysis of 17 derivatives from a somatic fusion between common wheat (Triticum aestivum) andtall wheat grass (Thinopyrum ponticum) showed a diversity of high molecular weight glutenin subunit(HMW-GS) compositions. On the basis of the inheritance of HMW-GS patterns, the derivatives wereeither (i) bred true over four successive generations, (ii) generated a few novel HMW-GS combinationsat each generation, or (iii) showed highly unstable HMW-GS compositions. HMW-GS analysis of F5seed and each single seed-generated F6 progenies further revealed that most of the HMW-GS hadgenetic stability. The variations of HMW-GS were inferred to occur in early generations and weremaintained thereafter. Low molecular weight glutenin subunits (LMW-GS) in hybrid lines with high orlow bread-making quality, classified into the first pattern, were compared. The result showed thathybrid lines with the uniform HMW-GS patterns also have identical LMW-GS patterns. The Glu-1quality score was inferred to be relatively significant to the sodium dodecyl dulfate sedimentationvalue, as well as to correlate with the gluten exponent and contents of dry gluten and proteins. Sexualhybridization between high-quality somatic hybrid progeny II-12 and Chinese Spring (CS) showedthat these high-quality HMW-GS genes could entail progenies. There was not subunit variation inthe progenies of II-12 × CS. Therefore, sexual hybridization between somatic hybrid line and cultivarscan transfer novel high-quality HMW-GS of somatic hybrids and benefit wheat breeding.Keywords: Triticum aestivum; Thinpyrum ponticum; somatic hybrid lines; HMW-GS variation andinheritances; wheat quality breeding