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The wax gourd genomes offer insights into the genetic diversity and ancestral cucurbit karyotype. | LitMetric

The wax gourd genomes offer insights into the genetic diversity and ancestral cucurbit karyotype.

Nat Commun

Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Sino-Dutch Joint Laboratory of Horticultural Genomics, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.

Published: November 2019

AI Article Synopsis

Article Abstract

The botanical family Cucurbitaceae includes a variety of fruit crops with global or local economic importance. How their genomes evolve and the genetic basis of diversity remain largely unexplored. In this study, we sequence the genome of the wax gourd (Benincasa hispida), which bears giant fruit up to 80 cm in length and weighing over 20 kg. Comparative analyses of six cucurbit genomes reveal that the wax gourd genome represents the most ancestral karyotype, with the predicted ancestral genome having 15 proto-chromosomes. We also resequence 146 lines of diverse germplasm and build a variation map consisting of 16 million variations. Combining population genetics and linkage mapping, we identify a number of regions/genes potentially selected during domestication and improvement, some of which likely contribute to the large fruit size in wax gourds. Our analyses of these data help to understand genome evolution and function in cucurbits.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6856369PMC
http://dx.doi.org/10.1038/s41467-019-13185-3DOI Listing

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