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Fine mapping and candidate gene analysis of a QTL associated with leaf rolling index on chromosome 4 of maize (Zea mays L.)

文献类型： 外文期刊

作者： Gao, Lulu 1 ; Yang, Guanghui 1 ; Li, Yufeng 1 ; Fan, Nannan 1 ; Li, Hongjian 1 ; Zhang, Ming 1 ; Xu, Ruibin 1 ; Zhang, Mi 1 ;

作者机构： 1.China Agr Univ, State Key Lab Agrobiotechnol, Beijing Key Lab Crop Genet Improvement, Beijing 100193, Peoples R China

2.China Agr Univ, Key Lab Crop Heterosis & Utilizat, Beijing Key Lab Crop Genet Improvement, Beijing 100193, Peoples R China

3.Natl Plant Gene Res Ctr, Beijing 100193, Peoples R China

4.Shanxi Acad Agr Sci, Dryland Agr Res Ctr, Taiyuan 030031, Shanxi, Peoples R China

5.Hebei Acad Agr & Forestry Sci, Inst Cereal & Oil Crops, Hebei Crop Genet Breeding Lab, Shijiazhuang 050035, Hebei, Peoples R China

6.China Agr Univ, Natl Maize Improvement Ctr China, Beijing, Peoples R China

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.699； 五年影响因子：5.565 ）

ISSN： 0040-5752

年卷期： 2019 年 132 卷 11 期

页码：

收录情况： SCI

摘要： Leaf rolling is an important agronomic trait related to plant architecture that can change the light condition and photosynthetic efficiency of the population. Here, we isolated one EMS-induced mutant in Chang7-2 background with extreme abaxial rolling leaf, named abrl1. Histological analysis showed that the increased number and area of bulliform cells may contribute to abaxial rolling leaf in abrl1. The F-2 and F-2:3 populations derived from Wu9086 with flat leaves and abrl1 were developed to map abrl1. Non-Mendelian segregation of phenotypic variation was observed in these populations and five genomic regions controlling the leaf rolling index (LRI) were identified, which could be due to the phenotypic difference between Chang7-2 and Wu9086. Moreover, one major QTL qLRI4 on chromosome 4 was further validated and finely mapped to a genetic interval between InDel13 and InDel10, with a physical distance of approximately 277 kb using NIL populations, among which one 602-bp insertion was identified in the promoter region of HD-Zip class IV gene Zm00001d049443 (named as ZmOCL5) of abrl1 compared with wild-type Chang7-2. Remarkably, the 602-bp InDel was associated with LRI in an F-2 population developed by crossing abrl1 mutant and its wild-type. In addition, the 602-bp insertion increased ZmOCL5 promoter activity and expression. Haplotype analysis demonstrated that the 602-bp insertion was a rare mutation event. Taken together, we propose that the rolled leaf in the abrl1 mutant may be partially attributed to the 602-bp insertion, which may be an attractive target for the genetic improvement of LRI in maize.

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