NDLI: Molecular evidence for post-domestication selection in the Waxy gene of Chinese waxy maize

Content Provider	Springer Nature Link
Author	Fan, Longjiang Quan, Liyan Leng, Xiaodong Guo, Xingyi Hu, Weiming Ruan, Songlin Ma, Huasheng Zeng, Mengqian
Copyright Year	2008
Abstract	Waxy maize was first reported in China in 1909 and is mainly used in food production in Asia. The evidence for strong domestication selection in the Waxy locus of rice and a selective sweep around its genomic region make us to wonder whether there has been similar selection in Waxy in glutinous maize. To address this issue, DNA sequences of Waxy, three flanking genes and an unlinked gene (Adh1) of 30 accessions sampled from Chinese waxy maize accessions, including representative landraces and inbred lines, were determined in this study. Sharp reduction of nucleotide diversity and significant neutrality tests (Tajima’s D and Fu and Li’s F*) were observed in the Waxy locus in Chinese waxy maize but not in nonglutinous maize; comparison with the unlinked gene confirmed that this pattern was different to Waxy. Sequence analysis across a 143 kb genomic segment centered on the Waxy locus revealed patterns consistent with a selective sweep in the upstream region of Waxy. The selective sweep detected based on current limited genomic sequences exceeded over 50 kb, indicating strong selection in this or a bigger region. However, No sweep effect was detected in the repetitive downstream region of Waxy. Phylogenetic analysis indicated that Chinese waxy maize was domesticated from the cultivated flint maize (Zea mays ssp. mays) that was introduced from the new world. At least two independent deletions in exon 7 (30 bp) and 10 (15 bp) were identified in the Chinese accessions respectively. These findings demonstrate a similar pattern of domestication selection in the Waxy genomic region in both glutinous maize and rice, suggesting that this pattern in the rise of glutinous phenotype is likely in other cereal crops.
Starting Page	329
Ending Page	338
Page Count	10
File Format	PDF
ISSN	13803743
Journal	Molecular Breeding
Volume Number	22
Issue Number	3
e-ISSN	15729788
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-03-29
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Chinese waxy maize Waxy locus Domestication selection Selective sweep Origin Biotechnology Plant Physiology Plant Pathology Plant Genetics & Genomics Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Molecular Biology Biotechnology Agronomy and Crop Science

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