Rare maternal and biparental transmission of the cucumber mitochondrial DNA reveals sorting of polymorphisms among progenies
文献类型： 外文期刊
作者： Shen, Jia 1 ; Shou, Weisong 1 ; Zhang, Yuejian 1 ; Yuan, Gaoya 2 ; Zhao, Yu 2 ; Chen, Jinfeng 2 ; Havey, Michael J. 3 ;
作者机构： 1.Zhejiang Acad Agr Sci, Inst Vegetables, Hangzhou 310021, Zhejiang, Peoples R China
2.Nanjing Agr Univ, Coll Hort, Nanjing 210095, Jiangsu, Peoples R China
3.Univ Wisconsin, USDA ARS, Madison, WI 53706 USA
4.Univ Wisconsin, Dept Hort, Madison, WI 53706 USA
期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.699； 五年影响因子：5.565 ）
ISSN： 0040-5752
年卷期： 2019 年 132 卷 4 期
页码：
收录情况： SCI
摘要： Key messageWe used a mitochondrial (mt) mutant of cucumber to document rare maternal transmission of mt polymorphisms and demonstrate that polymorphisms can become more prevalent and sort to progenies to increase mt DNA diversity.AbstractThe mitochondrial (mt) DNAs of most angiosperms show maternal inheritance, although relatively rare biparental or paternal transmission has been documented. The mt DNAs of plants in the genus Cucumis (family Cucurbitaceae) are paternally transmitted in intra- and interspecific crosses. MSC16 is an inbred line of cucumber (Cucumis sativus) with a mitochondrially associated mosaic (MSC) phenotype. MSC16 was crossed as the male parent to wild-type cultivar Calypso, and hybrid progenies were evaluated for the wild-type phenotype in order to screen for rare maternal or biparental transmission of the mt DNA. We then used standard and droplet digital (dd) PCR to study the transmission of polymorphic mt markers across three generations. We observed evidence for occasional maternal and biparental transmission of the mt DNA in cucumber. The transmission of specific regions of the maternal mt DNA could be as high as 17.8%, although the amounts of these maternal regions were often much lower relative to paternally transmitted regions. Different combinations of maternal and paternal mt polymorphisms were detected in progenies across generations, indicating that relatively rare maternal regions can be transmitted to progenies and become predominant to increase mt DNA diversity over generations.
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