生物
种质资源
采后
数量性状位点
候选基因
基因
遗传学
特质
等位基因
索引
植物抗病性
园艺
标记辅助选择
基因型
单核苷酸多态性
计算机科学
程序设计语言
作者
Nanqiao Liao,Zhongyuan Hu,Yingying Li,Junfang Hao,Shuna Chen,Quan Xue,Yuyuan Ma,Kejia Zhang,Ahmed Mahmoud,Abid Ali,Guy Kateta Malangisha,Xiaolong Lyu,Jinghua Yang,Mingfang Zhang
摘要
Summary Fruit rind plays a pivotal role in alleviating water loss and disease and particularly in cracking resistance as well as the transportability, storability and shelf‐life quality of the fruit. High susceptibility to cracking due to low rind hardness is largely responsible for severe annual yield losses of fresh fruits such as watermelon in the field and during the postharvest process. However, the candidate gene controlling the rind hardness phenotype remains unclear to date. Herein, we report, for the first time, an ethylene‐responsive transcription factor 4 ( ClERF4 ) associated with variation in rind hardness via a combinatory genetic map with bulk segregant analysis (BSA). Strikingly, our fine‐mapping approach revealed an InDel of 11 bp and a neighbouring SNP in the ClERF4 gene on chromosome 10, conferring cracking resistance in F 2 populations with variable rind hardness. Furthermore, the concomitant kompetitive/competitive allele‐specific PCR (KASP) genotyping data sets of 104 germplasm accessions strongly supported candidate ClERF4 as a causative gene associated with fruit rind hardness variability. In conclusion, our results provide new insight into the underlying mechanism controlling rind hardness, a desirable trait in fresh fruit. Moreover, the findings will further enable the molecular improvement of fruit cracking resistance in watermelon via precisely targeting the causative gene relevant to rind hardness, ClERF4 .
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