Potential locus W and candidate gene McPRR2 associated with pericarp pigment accumulation in bitter gourd (Momordica charantia L.) revealed via BSA-seq analysis

被引：2

作者：

Guo, Jinju ^{[1
]}

Han, Xin ^{[1
]}

Wu, Tingquan ^{[1
]}

Wang, Rui ^{[1
]}

Zhao, Junhong ^{[1
]}

Wang, Rufang ^{[1
]}

Tan, Delong ^{[1
]}

Yan, Shijuan ^{[2
]}

Gao, Jie ^{[3
]}

Huang, Wenjie ^{[2
]}

Zhang, Huiyao ^{[1
]}

Zhang, Changyuan ^{[1
]}

机构：

[1] Guangdong Acad Agr Sci, Inst Facil Agr, Guangzhou 510640, Guangdong, Peoples R China

[2] Guangdong Acad Agr Sci, Agrobiol Gene Res Ctr, Guangzhou 510640, Guangdong, Peoples R China

[3] Guangdong Acad Agr Sci, Environm Hort Res Inst, Guangdong Prov Key Lab Ornamental Plant Germplasm, Guangzhou 510640, Guangdong, Peoples R China

来源：

PLANT PHYSIOLOGY AND BIOCHEMISTRY | 2024年 / 208卷

基金：

芬兰科学院;

关键词：

Bitter gourd; BSA-seq; McPRR2; Chlorophyll; Pericarp color; FRUIT COLOR; TOMATO; CHLOROPHYLL; INHERITANCE; TRAITS; GENOME;

D O I：

10.1016/j.plaphy.2024.108515

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Pericarp color is a prominent agronomic trait that exerts a significant impact on consumer and breeder preferences. Genetic analysis has revealed that the pericarp color of bitter gourd is a quantitative trait. However, the underlying mechanism for this trait in bitter gourd remains largely unknown. In the present study, we employed bulked segregant analysis (BSA) to identify the candidate genes responsible for bitter gourd pericarp color (specifically, dark green versus white) within F2 segregation populations resulting from the crossing of B07 (dark green pericarp) and A06 (white pericarp). Through genomic variation, genetic mapping, and expression analysis, we identified a candidate gene named McPRR2, which was a homolog of Arabidopsis pseudo response regulator 2 (APRR2) encoded by LOC111023472. Sequence alignment of the candidate gene between the two parental lines revealed a 15-bp nucleotide insertion in the coding region of LOC111023472, leading to a premature stop codon and potentially causing a loss-of-function mutation. qRT-PCR analysis demonstrated that the expression of McPRR2 was significantly higher in B07 compared to A06, and it was primarily expressed in the immature fruit pericarp. Moreover, overexpression of McPRR2 in tomato could enhance the green color of immature fruit pericarp by increasing the chlorophyll content. Consequently, McPRR2 emerged as a strong candidate gene regulating the bitter gourd pericarp color by influencing chlorophyll accumulation. Finally, we developed a molecular marker linked to pericarp color, enabling the identification of genotypes in breeding populations. These findings provided valuable insights into the genetic improvement of bitter gourd pericarp color.

引用

页数：11