Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 429340
Title Genetic diversity and population structure of cucumber (Cucumis sativus L.)
Author(s) Lv, J.; Qi, J.; Shi, Q.; Shen, D.; Zhang, S.; Shao, G.; Li, H.; Sun, Z.; Weng, Y.; Shang, Y.; Gu, X.; Li, X.; Zhu, X.; Zhang, J.; Treuren, R. van; Dooijeweert, W. van; Zhang, Z.; Huang, S.
Source PLoS ONE 7 (2012)10. - ISSN 1932-6203 - 9
DOI https://doi.org/10.1371/journal.pone.0046919
Department(s) PRI Bioscience
Laboratory of Genetics
Centrum voor Genetische Bronnen Nederland
Laboratory of Plant Breeding
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) genetische diversiteit - cucumis sativus - komkommers - populatiegenetica - genenbanken - dna-fingerprinting - germplasm - genetische merkers - vruchtgroenten - groenten - genetic diversity - cucumbers - population genetics - gene banks - dna fingerprinting - genetic markers - fruit vegetables - vegetables - genome - map
Categories Plant Genetic Resources, Gene Banks / Fruit Vegetables
Abstract Knowing the extent and structure of genetic variation in germplasm collections is essential for the conservation and utilization of biodiversity in cultivated plants. Cucumber is the fourth most important vegetable crop worldwide and is a model system for other Cucurbitaceae, a family that also includes melon, watermelon, pumpkin and squash. Previous isozyme studies revealed a low genetic diversity in cucumber, but detailed insights into the crop's genetic structure and diversity are largely missing. We have fingerprinted 3,342 accessions from the Chinese, Dutch and U.S. cucumber collections with 23 highly polymorphic Simple Sequence Repeat (SSR) markers evenly distributed in the genome. The data reveal three distinct populations, largely corresponding to three geographic regions. Population 1 corresponds to germplasm from China, except for the unique semi-wild landraces found in Xishuangbanna in Southwest China and East Asia; population 2 to Europe, America, and Central and West Asia; and population 3 to India and Xishuangbanna. Admixtures were also detected, reflecting hybridization and migration events between the populations. The genetic background of the Indian germplasm is heterogeneous, indicating that the Indian cucumbers maintain a large proportion of the genetic diversity and that only a small fraction was introduced to other parts of the world. Subsequently, we defined a core collection consisting of 115 accessions and capturing over 77% of the SSR alleles. Insight into the genetic structure of cucumber will help developing appropriate conservation strategies and provides a basis for population-level genome sequencing in cucumber.
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