数字农科院2.0

Slgid1Ais A Putative Candidate Gene Forqtph1.1, A Major-Effect Quantitative Trait Locus Controlling Tomato Plant Height

文献类型： 外文期刊

作者： Liu, XL; Yang, WC; Wang, J; Yang, MX; Wei, K; Liu, XY; Qiu, ZK; van Giang, T; Wang, XX; Guo, YM; Li, JM; Liu, L; Shu, JS; Du, YC; Huang, ZJ

作者机构：

关键词： Tomato (Solanum Lycopersicum); Plant Height; Quantitative Trait Locus; Fine Mapping; Slgid1A; Transcriptome Analysis

期刊名称： FRONTIERS IN GENETICS

ISSN：

年卷期： 2020 年 11 卷

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收录情况： JCR（2021版）

摘要： Plant height is an important agronomic trait in crops. Several genes underlying tomato (Solanum lycopersicum) plant height mutants have been cloned. However, few quantitative trait genes for plant height have been identified in tomato. In this study, seven quantitative trait loci (QTLs) controlling plant height were identified in tomato. Of which,qtph1.1(QTL for tomato plant height 1.1),qtph3.1andqtph12.1were major QTLs and explained 15, 16, and 12% of phenotypic variation (R-2), respectively. Theqtph1.1was further mapped to an 18.9-kb interval on chromosome 1. Based on the annotated tomato genome (version SL2.50, annotation ITAG2.40),Solyc01g098390encoding GA receptor SlGID1a was the putative candidate gene. TheSlGID1agene underlying theqtph1.1locus contained a single nucleotide polymorphism (SNP) that resulted in an amino acid alteration in protein sequence. The near-isogenic line containing theqtph1.1locus (NIL-qtph1.1) exhibited shorter internode length and cell length than the wild type (NIL-WT). The dwarf phenotype of NIL-qtph1.1could not be rescued by exogenous GA(3)treatment. Transcriptome analysis and real-time quantitative reverse transcription PCR (qPCR) showed that several genes related to biosynthesis and signaling of GA and auxin were differentially expressed in stems between NIL-qtph1.1and NIL-WT. These findings might pave the road for understanding the molecular regulation mechanism of tomato plant height.

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