期刊
JOURNAL OF APPLIED GENETICS
卷 59, 期 1, 页码 35-42出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s13353-017-0422-5
关键词
Controlled deterioration; Dormancy; Germination; Pre-harvest sprouting; QTL mapping
资金
- German Federation of Industrial Research Associations (AiF)
- German Federal Ministry for Economic Affairs and Technology
- Gemeinschaft zur Forderung der privaten deutschen Pflanzenzuchtung e.V. (GFP)
- Austrian Research Promotion Agency (FFG)
- Austrian Seed Association (CORNET) [834766]
- Austrian Seed Association (IGF) [75 EN/1]
Pre-harvest sprouting (PHS) and seed longevity (SL) are complex biological processes of major importance for agricultural production. In the present study, a recombinant inbred line (RIL) population derived from a cross between the German winter wheat (Triticum aestivum L.) cultivars History and Rubens was used to identify genetic factors controlling these two physiological seed traits. A falling number (FN) test was employed to evaluate PHS, while SL was measured using a germination test (and the speed of germination) after controlled deterioration. FN of the population was assessed in four environments; SL traits were measured in one environment. Four major quantitative trait loci (QTL) for FN were detected on chromosomes 4D, 5A, 5D, and 7B, whereas for SL traits, a major QTL was found on chromosome 1A. The FN QTL on chromosome 4D that coincided with the position of the dwarfing gene Rht-D1b only had effects in environments that were free of PHS. The remaining three QTL for FN were mostly pronounced under conditions conducive to PHS. The QTL on the long arm of chromosome 7B corresponded to the major gene locus controlling late maturity alpha-amylase (LMA) in wheat. The severity of the LMA phenotype became truly apparent under sprouting conditions. The position on the long arm of chromosome 1A of the QTL for SL points to a new QTL for this important regenerative seed trait.
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