Quantitative trait locus mapping for seed dormancy in different post-ripening stages in a Tibetan semi-wild wheat (Triticum aestivum ssp. tibetanum Shao)

Tibetan semi-wild wheat ( Triticum aestivum ssp. tibetanum Shao) is a hexaploid wheat resource distributed only in Tibet that has an interesting type of seed dormancy in addition to hulled glumes and brittle spikelets. A whole-genome linkage map of T. aestivum ssp. tibetanum was constructed for a po...

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Bibliographic Details
Published in:Euphytica 2015-06, Vol.203 (3), p.557-567
Main Authors: Jiang, Yun-Feng, Wang, Ji-Rui, Luo, Wei, Wei, Yu-Ming, Qi, Peng-Fei, Liu, Ya-Xi, Jiang, Qian-Tao, Peng, Yuan-Ying, Chen, Guo-Yue, Dai, Shou-Fen, Zheng, You-Liang, Lan, Xiu-Jin
Format: Article
Language:English
Subjects:
Analysis
Biomedical and Life Sciences
Biotechnology
Chromosomes
Gene loci
Gene mapping
Genetic markers
Genomics
Genotype & phenotype
Life Sciences
Phenotypic variations
Plant breeding
Plant Genetics and Genomics
Plant Pathology
Plant Physiology
Plant Sciences
Quantitative genetics
Seeds
Triple Bottom Line
Wheat
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Summary:Tibetan semi-wild wheat ( Triticum aestivum ssp. tibetanum Shao) is a hexaploid wheat resource distributed only in Tibet that has an interesting type of seed dormancy in addition to hulled glumes and brittle spikelets. A whole-genome linkage map of T. aestivum ssp. tibetanum was constructed for a population of 186 recombinant inbred lines using 645 diversity array technology (DArT) markers, 127 simple sequence repeat markers and three R - 1 genotyping markers. Seed dormancy was evaluated at five post-ripening stages from 2010 to 2013. Comprehensive quantitative trait locus (QTL) mapping by inclusive composite interval mapping analysis identified seven QTLs for seed dormancy, designated as Qsd.sau - 1B , Qsd.sau - 3A , Qsd.sau - 3B, Qsd.sau - 3D , Qsd.sau - 4A1 , Qsd.sau - 4A2 , and Qsd.sau - 7A , on chromosomes 1BL, 3AL, 3BL, 3DL, 4AS, 4AL, and 7AL, which explained 8.9, 7.2, 10.8, 7.0, 11.4, 9.4, and 12.7 % of phenotypic variation, respectively. Qsd.sau - 4A1 and Qsd.sau - 7A have only rarely been reported in domesticated common wheat but were prominent in T. aestivum ssp. tibetanum accession Q1028. Qsd.sau - 4A1 was associated with intense, short-duration dormancy and was recognized as an ideal QTL for wheat breeding.
ISSN:0014-2336
1573-5060
DOI:10.1007/s10681-014-1266-2