期刊
GENOME
卷 65, 期 2, 页码 75-81出版社
CANADIAN SCIENCE PUBLISHING
DOI: 10.1139/gen-2020-0155
关键词
Chrysanthemum morifolium; EST-SSR; allele dosage; hexasomic; disomic
资金
- National Natural Science Foundation of China (NSFC) [31971706]
- National High Technology Research and Development Program of China [2013AA102706]
This study analyzed the inheritance mode of chrysanthemums and found that they predominantly inherit in a hexaploid manner, with random pairing of chromosomes.
Chrysanthemums (Chrysanthemum morifolium Ramat.) are ornamental flowers, which are famous worldwide. The mode of inheritance has great implications for the genetic analysis of polyploid species. However, genetic analysis of chrysanthemum has been hampered because of its controversial inheritance mode (disomic or hexasomic). To classify the inheritance mode of chrysanthemums, an analysis of three approaches was carried out in an F1 progeny of 192 offspring using 223 expressed sequence tag-simple sequence repeat (EST-SSR) markers. The analysis included segregation analysis, the ratio of simplex marker alleles linked in coupling to repulsion, as well as the transmission and segregation patterns of EST-SSR marker alleles. After segregation analysis, 204 marker alleles fit hexasomic inheritance and 150 marker alleles fit disomic inheritance, showing that marker alleles were inherited predominantly in a hexasomic manner. Furthermore, the results of the analysis of allele configuration and segregation behavior of five EST-SSR markers also suggested random pairing of chromosomes. Additionally, the ratio of simplex marker alleles linked in coupling to repulsion was 1:0, further supporting hexasomic inheritance. Therefore, it could be inferred that chrysanthemum is a complete or near-complete hexasome.
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