Comprehensive genomic and phenotypic analyses reveal the genetic basis of fruit quality in litchi
文献类型： 外文期刊
作者： Yan, Qian 1 ; Feng, Junting 4 ; Chen, Jiezhen 1 ; Wen, Yingjie 1 ; Jiang, Yonghua 1 ; Mai, Yingxiao 6 ; Huang, Kan 1 ; Liu, Hailun 1 ; Liu, Hongsen 6 ; Shi, Fachao 1 ; Hao, Yanwei 6 ; Cai, Changhe 1 ; Yu, Canye 1 ; Ou, Liangxi 1 ; Xia, Rui 6 ;
作者机构： 1.Guangdong Acad Agr Sci, Inst Fruit Tree Res, Guangzhou 510640, Guangdong, Peoples R China
2.Minist Agr & Rural Affairs, Key Lab South Subtrop Fruit Biol & Genet Resource, Guangzhou 510640, Guangdong, Peoples R China
3.Guangdong Prov Key Lab Sci & Technol Res Fruit Tre, Guangzhou 510640, Guangdong, Peoples R China
4.Sanya Res Inst, State Key Lab Trop Crop Breeding, Haikou 571101, Peoples R China
5.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Haikou 571101, Peoples R China
6.South China Agr Univ, Guangdong Basic Res Ctr Excellence Precise Breedin, State Key Lab Conservat & Utilizat Subtrop Agrobio, Coll Hort,Minist Agr & Rural Affairs,Key Lab Biol, Guangzhou 510642, Guangdong, Peoples R China
关键词：
Genetic diversity; Genetic basis; Fruit quality; Litchi (
期刊名称：GENOME BIOLOGY （ 影响因子：9.4； 五年影响因子：16.3 ）
ISSN： 1474-760X
年卷期： 2025 年 26 卷 1 期
页码：
收录情况： SCI
摘要： BackgroundLitchi, an economically important fruit crop in Southeast Asia, is renowned for its distinctive flavor and nutrient value, but its genetic diversity and genetic basis underlying fruit quality regulation remain largely unexplored.ResultsWe re-sequence 276 litchi accessions collected globally and identify 54 million high-quality biallelic SNPs. We then analyze the population structure and reveal four main subgroups within the population. By phenotypic profiling of 21 fruit-quality-related traits, followed with genome-wide association study, we identify a plethora of candidate genes and genomic loci that are responsible for regulating seed and fruit quality traits. In particular, we characterize and experimentally validate an invertase gene, LcSAI, encoding an enzyme catalyzing the conversion of sucrose into reducing sugars, as a key regulator of sugar composition in litchi fruit, affecting the sweetness of litchi fruits.ConclusionsOur study demonstrates the genetic diversity and population structure of litchi. We delineate the genetic basis of fruit quality through comprehensive genomic analyses and phenotypic profiling. These findings provide valuable resources and knowledge for understanding the genetic basis of fruit quality in litchi, which contribute to the theoretical basis for further genetic improvement.
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