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- Title
Quantitative trait locus mapping for seed dormancy in different post-ripening stages in a Tibetan semi-wild wheat ( Triticum aestivum ssp . tibetanum Shao).
- 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
- Abstract
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.
- Subjects
WHEAT; SEED dormancy; LOCUS in plant genetics; RIPENING of crops; PREHARVEST sprouting of corn; WHEAT breeding
- Publication
Euphytica, 2015, Vol 203, Issue 3, p557
- ISSN
0014-2336
- Publication type
Article
- DOI
10.1007/s10681-014-1266-2