Ma Xiaowei, Wu Hongxia, Liu Bin, Wang Songbiao, Zhang Yuehua, Su Muqing, Zheng Bin, Pan Hongbing, Du Bang, Wang Jun, He Ping, Chen Qianfu, An Hong, Xu Wentian, Luo Xiang
National Key Laboratory for Tropical Crop Breeding, Sanya 572024, China; Key Laboratory of Tropical Fruit Biology, Ministry of Agriculture & Rural Affairs; Key Laboratory for Postharvest Physiology and Technology of Tropical Horticultural Products of Hainan Province, South Subtropical Crops Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, Guangdong 524091, China.
Panzhihua Academy of Agricultural and Forestry Sciences, Panzhihua, Sichuan 617061, China.
Hortic Res. 2024 Jul 1;11(7):uhae153. doi: 10.1093/hr/uhae153. eCollection 2024 Jul.
Mango ( L.) has been widely cultivated as a culturally and economically significant fruit tree for roughly 4000 years. Despite its rich history, little is known about the crop's domestication, genomic variation, and the genetic loci underlying agronomic traits. This study employs the whole-genome re-sequencing of 224 mango accessions sourced from 22 countries, with an average sequencing depth of 16.37×, to explore their genomic variation and diversity. Through phylogenomic analysis, J.Y. Liang, a species grown in China, was reclassified into the cultivated mango group known as . Moreover, our investigation of mango population structure and differentiation revealed that Chinese accessions could be divided into two distinct gene pools, indicating the presence of independent genetic diversity ecotypes. By coupling genome-wide association studies with analyses of genotype variation patterns and expression patterns, we identified several candidate loci and dominant genotypes associated with mango flowering capability, fruit weight, and volatile compound production. In conclusion, our study offers valuable insights into the genetic differentiation of mango populations, paving the way for future agronomic improvements through genomic-assisted breeding.
芒果（Mangifera indica L.）作为一种具有重要文化和经济意义的果树，已经被广泛种植了大约4000年。尽管其历史悠久，但对于该作物的驯化、基因组变异以及农艺性状背后的基因位点却知之甚少。本研究对来自22个国家的224份芒果种质进行了全基因组重测序，平均测序深度为16.37×，以探索它们的基因组变异和多样性。通过系统发育基因组分析，中国种植的品种象牙芒（J.Y. Liang）被重新归类为栽培芒果品种“桂七芒”（Guifei）。此外，我们对芒果群体结构和分化的研究表明，中国种质可分为两个不同的基因库，这表明存在独立的遗传多样性生态型。通过将全基因组关联研究与基因型变异模式和表达模式分析相结合，我们确定了几个与芒果开花能力、果实重量和挥发性化合物产生相关的候选基因位点和优势基因型。总之，我们的研究为芒果群体的遗传分化提供了有价值的见解，为未来通过基因组辅助育种进行农艺改良铺平了道路。
