Genetic diversity of Malus cultivars and wild relatives in the Chinese National Repository of Apple Germplasm Resources
文献类型: 外文期刊
第一作者: Gao, Yuan
作者: Gao, Yuan;Liu, Fengzhi;Wang, Kun;Wang, Dajiang;Gong, Xin;Liu, Lijun;Richards, Christopher M.;Henk, Adam D.;Volk, Gayle M.
作者机构:
关键词: Genetic resources;Apple;Diversity;Cultivars
期刊名称:TREE GENETICS & GENOMES ( 影响因子:2.297; 五年影响因子:2.547 )
ISSN: 1614-2942
年卷期: 2015 年 11 卷 5 期
页码:
收录情况: SCI
摘要: The Research Institute of Pomology (IP), Chinese Academy of Agricultural Sciences (CAAS) in Xingcheng, China, maintains hundreds of apple accessions that originated from around the world. We have used 16 microsatellites to assess the diversity and differentiation of 391 accessions within the IP that represent Malus x domestica (from China, Japan, former Soviet Republics, and Western countries) as well as the crop's wild relative species Malus baccata, Malus prunifolia, Malus x robusta, and Malus sieversii. We identified genetic relationships among these eight source categories that suggest that the M. x domestica cultivars from the former Soviet Republics are most closely related to M. sieversii and may represent an independent lineage of domesticated apples distinct from those found in Western Europe and North America. We show that the M. x domestica cultivars from China and Western sources are genetically similar, whereas the cultivars from Japan are distinct. We also describe two accessions of M. x domestica ssp. chinensis landraces that are believed to be over 2000 years old and are more similar to wild species than are most of the M. x domestica cultivars. We show that the wild, landrace, and cultivar accessions within the IP offer novel diversity to apple breeding programs.
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