小麦有效分蘖数QTLs定位及其元分析

doi:10.3969/j.issn.1674-7968.2020.04.002

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Abstract Productive tiller number (PTN) is one of the important factors for the yield performance of wheat (Triticum aestivum) and a complex quantitative trait controlled by polygenes. In this case, it is critical to explore the main-effect quantitative trait loci (QTL) and its closely linked molecular markers by the strategies of QTL mapping and meta-analysis in molecular genetic improvement in wheat breeding. In this study, a set of recombinant inbred lines (RIL) of wheat under different water conditions was used to map QTLs for the PTN trait. These identified QTLs were further integrated with reported QTLs for meta-analysis. The results showed that phenotypic values of PTN in the RIL varied widely with significantly transgressive segregation which were sensitive to water stress and thus indicated a low heritability. Under different water conditions, a total of 22 additive QTLs were identified and distributed on all chromosomes except chromosome 4A, accounting for 5.86%~13.84% of phenotypic variations. A total of 97 QTLs governing the PTN from 15 mapping populations were used to construct QTL consensus map in wheat. Consequently, 33 of meta QTLs and their closely linked molecular markers were available and confirmed. The minimum interval of meta QTL was 1.94 cM. The study would be useful to fine QTL mapping and molecular marker-assisted selection breeding for the productive tiller number in wheat.

Key words： Wheat Productive tiller number QTL mapping Meta-analysis

Received: 21 July 2019

ZTFLH:	S512.1
	S332.4

Corresponding Authors: * yangdl@gsau.edu.cn

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	ZUO Yu-Xin
	LIU Yuan
	ZHANG Pei-Pei
	LI Meng-Fei
	CHENG Hong-Bo
	CHEN Si-Jin
	XING Hua
	YANG De-Long

Cite this article:

ZUO Yu-Xin,LIU Yuan,ZHANG Pei-Pei, et al. Mapping and Meta-analysis of QTLs for the Productive Tiller Number in Wheat (Triticum aestivum)[J]. 农业生物技术学报, 2020, 28(4): 582-593.

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http://journal05.magtech.org.cn/Jwk_ny/EN/10.3969/j.issn.1674-7968.2020.04.002 OR http://journal05.magtech.org.cn/Jwk_ny/EN/Y2020/V28/I4/582

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