Population structure, genetic diversity and fruit-related traits of wild and cultivated melons based on chloroplast geno
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RESEARCH ARTICLE
Population structure, genetic diversity and fruit-related traits of wild and cultivated melons based on chloroplast genome Haonan Cui . Zhuo Ding . Qianglong Zhu . Yue Wu . Boyan Qiu . Peng Gao
Received: 12 April 2020 / Accepted: 8 October 2020 Ó Springer Nature B.V. 2020
Abstract The melon is an important fruit crop. Chloroplast genomes are widely used to analyze plant genetic diversity. The chloroplast genome was used to study melon population genetics. We identified 192 SNPs in the chloroplast genome of 348 melon tissue samples. These SNPs were mainly distributed in the large single copy and small single copy of the chloroplast genome. The two inverted repeat (IR) regions (IRa and IRb) contained almost no SNPs. The melon population structure, fruit-related traits, and genetic diversity within each group were analyzed based on these SNPs. The 192 SNPs effectively
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10722-020-01041-z) contains supplementary material, which is available to authorized users. H. Cui Z. Ding Y. Wu B. Qiu P. Gao (&) College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, Heilongjiang, People’s Republic of China e-mail: [email protected] H. Cui Z. Ding Y. Wu B. Qiu P. Gao Key Laboratory of Biology and Genetic Improvement of Horticulture Crops (Northeast Region), Ministry of Agriculture, Harbin 150030, Heilongjiang, People’s Republic of China Q. Zhu Department of Horticulture, College of Agronomy, Jiangxi Agricultural University, Nanchang, People’s Republic of China
divided the melon populations into three groups: wild, thick-rind type cultivated melon, and thin-rind type cultivated melon groups, with genetic diversities of 1.12 9 10-3, 4.71 9 10-4, and 2.85 9 10-4, respectively. This study analyzed the single fruit weight, soluble solids content, flesh color value, and flesh thickness (FT) traits in the population to understand differences in important fruit-related traits, and there were remarkable differences in FT among the three groups. These results suggest the chloroplast genome can be used to study the population genetics of the melon, and they contribute to the classification and identification of core germplasm resources. Keywords Population structure Genetic diversity Melon Chloroplast genome
Introduction The melon (Cucumis melo L.) originated in Africa (Tanaka et al. 2013) or Asia (Sebastian et al. 2010). It is an annual plant dicotyledon of Cucurbitaceae that is widely cultivated globally, and it is an excellent source of nutrition and water in summer. According to the latest statistics of the Food and Agriculture Organization (www.fao.org/faostat/en/), the area covered by melon plantations in China accounted for approximately 38% the world’s plantations.
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Genet Resour Crop Evol
Chloroplasts and mitochondria are important semiautonomous organelles in plant cells with independent genetic mat
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