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Type: Journal article
Title: A three-component system incorporating Ppd-D1, copy number variation at Ppd-B1, and numerous small-effect quantitative trait loci facilitates adaptation of heading time in winter wheat cultivars of worldwide origin
Author: Würschum, T.
Langer, S.
Longin, C.
Tucker, M.
Leiser, W.
Citation: Plant, Cell and Environment, 2018; 41(6):1407-1416
Publisher: Wiley
Issue Date: 2018
ISSN: 0140-7791
Statement of
Tobias Würschum, Simon M. Langer, C. Friedrich H. Longin, Matthew R. Tucker, Willmar L. Leiser
Abstract: The broad adaptability of heading time has contributed to the global success of wheat in a diverse array of climatic conditions. Here, we investigated the genetic architecture underlying heading time in a large panel of 1,110 winter wheat cultivars of worldwide origin. Genome-wide association mapping, in combination with the analysis of major phenology loci, revealed a three-component system that facilitates the adaptation of heading time in winter wheat. The photoperiod sensitivity locus Ppd-D1 was found to account for almost half of the genotypic variance in this panel and can advance or delay heading by many days. In addition, copy number variation at Ppd-B1 was the second most important source of variation in heading, explaining 8.3% of the genotypic variance. Results from association mapping and genomic prediction indicated that the remaining variation is attributed to numerous small-effect quantitative trait loci that facilitate fine-tuning of heading to the local climatic conditions. Collectively, our results underpin the importance of the two Ppd-1 loci for the adaptation of heading time in winter wheat and illustrate how the three components have been exploited for wheat breeding globally.
Keywords: flowering time
Rights: © 2018 John Wiley & Sons Ltd.
DOI: 10.1111/pce.13167
Appears in Collections:Agriculture, Food and Wine publications
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