首页|Genetic analyses of ancient tea trees provide insights into the breeding history and dissemination of Chinese Assam tea(Camellia sinensis var.assamica)

Genetic analyses of ancient tea trees provide insights into the breeding history and dissemination of Chinese Assam tea(Camellia sinensis var.assamica)

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Chinese Assam tea(Camellia sinensis var.assamica)is an important tea crop with a long history of cultivation in Yunnan,China.Despite its potential value as a genetic resource,its genetic diversity and domestication/breeding history remain unclear.To address this issue,we genotyped 469 ancient tea plant trees representing 26 C.sinensis var.assamica populations,plus two of its wild relatives(six and three populations of C.taliensis and C.crassicolumna,respectively)using 16 nuclear microsatellite loci.Results showed that Chinese Assam tea has a relatively high,but comparatively lower gene diversity(Hs=0.638)than the wild relative C.crassicolumna(Hs=0.658).Clustering in STRUCTURE indicated that Chinese Assam tea and its two wild relatives formed distinct genetic groups,with considerable inter-specific introgression.The Chinese Assam tea accessions clustered into three gene pools,corresponding well with their geographic distribution.However,NewHybrids analysis indicated that 68.48％of ancient Chinese Assam tea plants from Xishuangbanna were genetic intermediates between the Puer and Lin-cang gene pools.In addition,10％of the ancient Chinese Assam tea individuals were found to be hybrids between Chinese Assam tea and C.taliensis.Our results suggest that Chinese Assam tea was domesticated separately in three gene pools(Puer,Lincang and Xishuangbanna)in the Mekong River valley and that the hybrids were subsequently selected during the domestication process.Although the domestication history of Chinese Assam tea in southwestern Yunnan remains complex,our results will help to identify valuable genetic resources that may be useful in future tea breeding programs.

Tea plantHybrid originGenetic diversityDomestication historyCamellia sinensis var.assamicaCamellia taliensis

Miao-Miao Li、Muditha K.Meegahakumbura、Moses C.Wambulwa、Kevin S.Burgess、Michael M?ller、Zong-Fang Shen、De-Zhu Li、Lian-Ming Gao

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CAS Key Laboratory for Plant Diversity and Biogeography of East Asia,Kunming Institute of Botany,Chinese Academy of Science,Kunming,650201,China

Germplasm Bank of Wild Species,Kunming Institute of Botany,Chinese Academy of Science,Kunming,650201,China

Kunming College of Life Science,University of Chinese Academy of Sciences,Kunming,650201,Yunnan,China

Department of Export Agriculture,Faculty of Animal Science and Export Agriculture,Uva Wellassa University,Badulla,90000,Sri Lanka

Department of Life Sciences,School of Science and Computing,South Eastern Kenya University,170-90200,Kitui,Kenya

Department of Biology,Columbus State University,University System of Georgia,Columbus,GA,31907-5645,USA

Royal Botanic Garden Edinburgh,20A Inverleith Row,Edinburgh,EH3 5LR,Scotland,UK

Lijiang Forest Biodiversity National Observation and Research Station,Kunming Institute of Botany,Chinese Academy of Sciences,Lijiang,674100,Yunnan,China

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国家自然科学基金国家自然科学基金Key Basic Research Program of Yunnan Province,ChinaScottish Government's Rural and Environment Science and Analytical Services division

3197036331161140350202101BC070003

2024

10.1016/j.pld.2023.06.002

植物多样性(英文)
中国科学院昆明植物研究所，中国植物学会

植物多样性(英文)

CSTPCD
影响因子：0.617
ISSN：2096-2703
年,卷(期)：2024.46(2)
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