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Authors: Zeng, Lin and Tu, Xiao-Long and Dai, He and Han, Feng-Ming and Lu, Bing-She and Wang, Ming-Shan and Nanaei, Hojjat Asadollahpour and Tajabadipour, Ali and Mansouri, Mehdi and Li, Xiao-Long and Ji, Li-Li and Irwin, David M and Zhou, Hong and Liu, Min and Zheng, Hong-Kun and Esmailizadeh, Ali and Wu, Dong-Dong

Pistachio (Pistacia vera), one of the most important commercial nut crops worldwide, is highly adaptable to abiotic stresses and is tolerant to drought and salt stresses.Here, we provide a draft de novo genome of pistachio as well as large-scale genome resequencing. Comparative genomic analyses reveal stress adaptation of pistachio is likely attributable to the expanded cytochrome P450 and chitinase gene families. Particularly, a comparative transcriptomic analysis shows that the jasmonic acid (JA) biosynthetic pathway plays an important role in salt tolerance in pistachio. Moreover, we resequence 93 cultivars and 14 wild P. vera genomes and 35 closely related wild Pistacia genomes, to provide insights into population structure, genetic diversity, and domestication. We find that frequent genetic admixture occurred among the different wild Pistacia species. Comparative population genomic analyses reveal that pistachio was domesticated about 8000?years ago and suggest that key genes for domestication related to tree and seed size experienced artificial selection.Our study provides insight into genetic underpinning of local adaptation and domestication of pistachio. The Pistacia genome sequences should facilitate future studies to understand the genetic basis of agronomically and environmentally related traits of desert crops.

Journal: Genome biology
DOI: 10.1186/s13059-019-1686-3
Year: 2019

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