Journal
MOLECULAR BREEDING
Volume 37, Issue 3, Pages -Publisher
SPRINGER
DOI: 10.1007/s11032-016-0612-6
Keywords
China waxy maize; Waxy mutation; Transposon; Origin area
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Funding
- Agricultural Science and Technology Innovation Program of Chinese Academy of Agricultural Sciences (CAAS)
- National Key Technologies R&D Program of China during the 12th 5-Year Plan period [2013BAD01B02]
- National Natural Science Foundation of China [31301301]
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The waxy gene mutation causes waxy maize grain to have a sticky quality. China has numerous waxy maize landraces and is thought to be the place of origin of waxy maize. The most abundant waxy maize resources in China are located in the Yunnan province and its surrounding areas. We collected 57 waxy maize landraces from Yunnan province and cloned and sequenced the waxy gene from its fourth to eighth exon. Two new waxy gene mutations, named wx-Cin4 and wx-124, were identified. The wx-Cin4 mutation is a 466-bp retrotransposon inserted into exon six. The wx-124 mutation is a 116-bp miniature inverted-repeat transposable element inserted into exon seven. This is the first time a 124-type mutation has been found in a maize waxy gene. The discovery of the two specific waxy mutations from landraces collected in Yunnan province provides new evidence supporting the hypothesis that China is the origin area for waxy maize.
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