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Fingerprinting 146 Chinese chestnut(Castanea mollissima Blume)accessions and selecting a core collection using SSR markers

引用

Journal of Integrative Agriculture 2021年第5期20卷 1277-1286页

作者： NIE Xing-hua WANG Ze-hua LIU Ning-wei SONG Li YAN Bo-qian XING Yu ZHANG Qing FANG Ke-feng ZHAO Yong-lian CHEN Xin WANG Guang-peng QIN Ling CAO Qing-qin Beijing Advanced Innovation Center for Tree Breeding by Molecular Design Beijing University of AgricultureBeijing 102206P.R.China College of Plant Science and technology Beijing Key Laboratory for Agricultural Application and New TechniqueBeijing University of AgricultureBeijing 102206P.R.China College of Landscape Architecture Beijing University of AgricultureBeijing 102206P.R.China chestnut technology experiment and extension station of huairou district Beijing 102206P.R.China Shandong Institute of Pomology Shandong Academy of Agricultural SciencesTai’an 271000P.R.China Changli Institute of Pomology Hebei Academy of Agriculture and Forestry SciencesChangli 066600P.R.China

Chinese chestnut is an important nut tree around the *** the types of Chinese chestnut resources are abundant,resource utilization and protection of chestnut accessions are still very ***,we fingerprinted and determined the genetic relationships and core collections of Chinese chestnuts using 18 fluorescently labeled SSR markers generated from 146 chestnut *** analyses showed that these markers from the tested accessions are highly polymorphic,with an average allele number(N_(a))and polymorphic information content(PIC)of 8.100 and 0.622 per locus,*** these strongly distinguishing markers,we successfully constructed unique fingerprints for 146 chestnut accessions and selected seven of the SSR markers as core markers to rapidly distinguish different *** exploration of the genetic relationships among the five cultivar groups indicated that Chinese chestnut accessions are divided into three regional type groups:group I(North China(NC)and Northwest China(NWC)cultivar groups),group II(middle and lower reaches of the Yangtze River(MLY)cultivar group)and group III(Southeast China(SEC)and Southwest China(SWC)cultivar groups).Finally,we selected 45 core collection members which represent the most genetic diversity of Chinese chestnut *** study provides valuable information for identifying chestnut accessions and understanding the phylogenetic relationships among cultivar groups,which can serve as the basis for efficient breeding in the future.

关键词： Castanea mollissima SSR markers fingerprinting phylogeny core collections

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