Genetic Diversity and Classification of the Cytoplasm of Chinese Elite Foxtail Millet [Setaria italica (L.) P. Beauv.] Parental Lines Revealed by Chloroplast Deoxyribonucleic Acid Variation
文献类型： 外文期刊
作者： Liu, Dan 1 ; Cui, Yanjiao 2 ; He, Jihong 3 ; Li, Suying 2 ; Li, Qiang 2 ; Liang, Dan 1 ; Wang, Jianhe 1 ; Shi, Xiaowei 1 ; W 1 ;
作者机构： 1.Tianjin Acad Agr Sci, Tianjin Crop Res Inst, Tianjin, Peoples R China
2.Tangshan Normal Univ, Dept Life Sci, Tangshan, Peoples R China
3.Gansu Acad Agr Sci, Crop Res Inst, Lanzhou, Gansu, Peoples R China
关键词： foxtail millet; elite parental lines; genetic diversity; cytoplasmic type; chloroplast deoxyribonucleic acid
期刊名称：FRONTIERS IN GENETICS （ 影响因子：4.599； 五年影响因子：4.888 ）
ISSN：
年卷期： 2019 年 10 卷
页码：
收录情况： SCI
摘要： Due to the maternal inheritance of cytoplasm, using foxtail millet [Setaria italica (L.) P. Beauv.] male sterile lines with a single cytoplasmic source as the female parent will inevitably lead to a narrow source of cytoplasm in hybrids, which may make them vulnerable to infection by cytoplasm-specific pathogens, ultimately leading to destructive yield losses. To assess cytoplasmic genetic diversity in plants, molecular markers derived from chloroplast DNA (cpDNA) have been used. However, such markers have not yet been applied to foxtail millet. In this study, we designed and screened nine pairs of polymorphic foxtail millet-specific primers based on its completely sequenced cpDNA. Using these primers, we analyzed the genetic diversity and cytoplasmic types of 130 elite foxtail millet parental lines collected in China. Our results revealed that the cytoplasmic genetic diversity of these accessions was low and needs to be increased. The parental lines were divided into four cytoplasmic types according to population structure analysis and a female parent-derivative evolutionary graph, indicating that the cytoplasmic types of elite foxtail millet lines were rather limited. A principal component analysis (PCA) plot was linked with the geographic and ecological distribution of accessions for each cytoplasmic type, as well as their basal maternal parents. Collectively, our results suggest that enriching cytoplasmic sources through the use of accessions from diverse ecological regions and other countries as the female parent may improve foxtail millet breeding programs, and prevent infection by cytoplasm-specific pathogens.
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