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Related Experiment Video

Updated: Jun 19, 2026

High-throughput, Microscale Protocol for the Analysis of Processing Parameters and Nutritional Qualities in Maize (Zea mays L.)
05:55

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Published on: June 16, 2018

Post-domestication selection in the maize starch pathway.

Longjiang Fan1, Jiandong Bao, Yu Wang

  • 1Department of Agronomy, Institute of Crop Science and Institute of Bioinformatics, Zhejiang University, Hangzhou, China.

Plos One
|October 28, 2009
PubMed
Summary
This summary is machine-generated.

Chinese waxy maize underwent genetic changes, with selection shifting from amylose extender1 (ae1) to waxy (wx) genes. This demonstrates how crop traits can be rapidly improved by altering selection targets within a gene pathway.

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Area of Science:

  • Agricultural Science
  • Genetics
  • Plant Breeding

Background:

  • Modern crops undergo domestication and post-domestication selection for genetic improvement.
  • Chinese waxy maize, derived from non-glutinous maize (Zea mays ssp. mays), serves as a model for studying post-domestication selection in maize.
  • Investigating genetic diversity in waxy maize offers insights into crop evolution and breeding.

Purpose of the Study:

  • To analyze genetic diversity in six key starch pathway genes within a Chinese waxy maize population.
  • To identify selective pressures and shifts in selection targets during the development of Chinese waxy maize.
  • To understand the mechanisms of rapid trait improvement in crops through altered gene selection.

Main Methods:

  • Genetic diversity analysis of six starch pathway genes in 55 Chinese waxy maize accessions.
  • Detection of selective bottlenecks and positive selection signals within the waxy maize population.
  • Comparative analysis of selection targets between glutinous and non-glutinous maize populations.

Main Results:

  • A selective bottleneck was observed in Chinese waxy maize, leading to reduced genetic diversity.
  • Significant positive selection was detected in the waxy (wx) gene, but not in the amylose extender1 (ae1) gene.
  • A shift in selection target from ae1 to wx was identified during the improvement of Chinese waxy maize, contrasting with non-glutinous maize.

Conclusions:

  • Post-domestication selection can rapidly improve agronomic traits in crops.
  • Changes in selection targets among genes within a pathway can facilitate swift trait enhancement.
  • The study highlights the dynamic nature of selection in shaping crop genetic architecture and improving desirable traits.