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Pepper variome reveals the history and key loci associated with fruit domestication and diversification

TitoloPepper variome reveals the history and key loci associated with fruit domestication and diversification
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2022
AutoriCao, Y., Zhang K., Yu H., Chen S., Xu D., Zhao H., Zhang Z., Yang Y., Gu X., Liu X., Wang H., Jing Y., Mei Y., Wang X., Lefebvre V., Zhang W., Jin Y., An D., Wang R., Bosland P., Li X., Paran I., Zhang B., Giuliano Giovanni, Wang L., and Cheng F.
RivistaMolecular Plant
ISSN16742052
Abstract

Pepper (Capsicum spp.) is an important vegetable crop that provides a unique pungent sensation when eaten. Through construction of a pepper variome map, we examined the main groups that emerged during domestication and breeding of C. annuum, their relationships and temporal succession, and the molecular events underlying the main transitions. The results showed that the initial differentiation in fruit shape and pungency, increase in fruit weight, and transition from erect to pendent fruits, as well as the recent appearance of large, blocky, sweet fruits (bell peppers), were accompanied by strong selection/fixation of key alleles and introgressions in two large genomic regions. Furthermore, we identified Up, which encodes a BIG GRAIN protein involved in auxin transport, as a key domestication gene that controls erect vs pendent fruit orientation. The up mutation gained increased expression especially in the fruit pedicel through a 579-bp sequence deletion in its 5′ upstream region, resulting in the phenotype of pendent fruit. The function of Up was confirmed by virus-induced gene silencing. Taken together, these findings constitute a cornerstone for understanding the domestication and differentiation of a key horticultural crop. © 2022 The Author

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85140993067&doi=10.1016%2fj.molp.2022.09.021&partnerID=40&md5=9b9397db51a0b7f94036ddf29009731f
DOI10.1016/j.molp.2022.09.021
Citation KeyCao2022