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Post-domestication selection in the maize starch pathway

Author: Longjiang Fan
Author: Jiandong Bao
Author: Yu Wang
Author: Jianqiang Yao
Author: Yijie Gui
Author: Weiming Hu
Author: Jinqing, Zhu
Author: Mengqian Zeng
Author: Yu Li
Author: Yunbi Xu
Year: 2009
ISSN: 1932-6203
Abstract: Modern crops have usually experienced domestication selection and subsequent genetic improvement (post-domestication selection). Chinese waxy maize, which originated from non-glutinous domesticated maize (Zea mays ssp. mays), provides a unique model for investigating the post-domestication selection of maize. In this study, the genetic diversity of six key genes in the starch pathway was investigated in a glutinous population that included 55 Chinese waxy accessions, and a selective bottleneck that resulted in apparent reductions in diversity in Chinese waxy maize was observed. Significant positive selection in waxy (wx) but not amylose extender1 (ae1) was detected in the glutinous population, in complete contrast to the findings in non-glutinous maize, which indicated a shift in the selection target from ae1 to wx during the improvement of Chinese waxy maize. Our results suggest that an agronomic trait can be quickly improved into a target trait with changes in the selection target among genes in a crop pathway.
Format: PDF
Language: English
Publisher: Public Library of Science
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Type: Article
Region: Global
Pages: 1-9 pages
Issue: 10
Volume: 4
DOI: 10.1371/journal.pone.0007612
Country of Focus: CHINESE
Agrovoc: MAIZE
Agrovoc: STARCH
Journal: PLoS ONE

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This item appears in the following Collection(s)

  • Genetic Resources
    Genetic Resources including germplasm collections, wild relatives, genotyping, genomics, and IP
  • Maize
    Maize breeding, phytopathology, entomology, physiology, quality, and biotech

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