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Genetic map of Triticum turgidum based on a hexaploid wheat population without genetic recombination for D genome

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Title: Genetic map of Triticum turgidum based on a hexaploid wheat population without genetic recombination for D genome
Authors: Zhang Li, Luo Jiang-Tao, Hao Ming, Zhang Lian-Quan, Yuan Zhong-Wei, Yan Ze-Hong, Liu Ya-Xi, Zhang Bo, Liu Bao-Long, Liu Chun-Ji, Zhang Huai-Gang, Zheng You-Liang, Liu Deng-Cai
Source: BMC Genetics, Vol 13, Iss 1, p 69 (2012)
Publisher Information: BMC, 2012.
Publication Year: 2012
Collection: LCC:Genetics
Subject Terms: Allopolyploid, Crossability, Doubled haploid, Segregation distortion, Genetics, QH426-470
More Details: Abstract Background A synthetic doubled-haploid hexaploid wheat population, SynDH1, derived from the spontaneous chromosome doubling of triploid F1 hybrid plants obtained from the cross of hybrids Triticum turgidum ssp. durum line Langdon (LDN) and ssp. turgidum line AS313, with Aegilops tauschii ssp. tauschii accession AS60, was previously constructed. SynDH1 is a tetraploidization-hexaploid doubled haploid (DH) population because it contains recombinant A and B chromosomes from two different T. turgidum genotypes, while all the D chromosomes from Ae. tauschii are homogenous across the whole population. This paper reports the construction of a genetic map using this population. Results Of the 606 markers used to assemble the genetic map, 588 (97%) were assigned to linkage groups. These included 513 Diversity Arrays Technology (DArT) markers, 72 simple sequence repeat (SSR), one insertion site-based polymorphism (ISBP), and two high-molecular-weight glutenin subunit (HMW-GS) markers. These markers were assigned to the 14 chromosomes, covering 2048.79 cM, with a mean distance of 3.48 cM between adjacent markers. This map showed good coverage of the A and B genome chromosomes, apart from 3A, 5A, 6A, and 4B. Compared with previously reported maps, most shared markers showed highly consistent orders. This map was successfully used to identify five quantitative trait loci (QTL), including two for spikelet number on chromosomes 7A and 5B, two for spike length on 7A and 3B, and one for 1000-grain weight on 4B. However, differences in crossability QTL between the two T. turgidum parents may explain the segregation distortion regions on chromosomes 1A, 3B, and 6B. Conclusions A genetic map of T. turgidum including 588 markers was constructed using a synthetic doubled haploid (SynDH) hexaploid wheat population. Five QTLs for three agronomic traits were identified from this population. However, more markers are needed to increase the density and resolution of this map in the future study.
Document Type: article
File Description: electronic resource
Language: English
ISSN: 1471-2156
Relation: http://www.biomedcentral.com/1471-2156/13/69; https://doaj.org/toc/1471-2156
DOI: 10.1186/1471-2156-13-69
Access URL: https://doaj.org/article/c009285272d04495ae307c7202ff0653
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  Data: Genetic map of Triticum turgidum based on a hexaploid wheat population without genetic recombination for D genome
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  Data: <searchLink fieldCode="AR" term="%22Zhang+Li%22">Zhang Li</searchLink><br /><searchLink fieldCode="AR" term="%22Luo+Jiang-Tao%22">Luo Jiang-Tao</searchLink><br /><searchLink fieldCode="AR" term="%22Hao+Ming%22">Hao Ming</searchLink><br /><searchLink fieldCode="AR" term="%22Zhang+Lian-Quan%22">Zhang Lian-Quan</searchLink><br /><searchLink fieldCode="AR" term="%22Yuan+Zhong-Wei%22">Yuan Zhong-Wei</searchLink><br /><searchLink fieldCode="AR" term="%22Yan+Ze-Hong%22">Yan Ze-Hong</searchLink><br /><searchLink fieldCode="AR" term="%22Liu+Ya-Xi%22">Liu Ya-Xi</searchLink><br /><searchLink fieldCode="AR" term="%22Zhang+Bo%22">Zhang Bo</searchLink><br /><searchLink fieldCode="AR" term="%22Liu+Bao-Long%22">Liu Bao-Long</searchLink><br /><searchLink fieldCode="AR" term="%22Liu+Chun-Ji%22">Liu Chun-Ji</searchLink><br /><searchLink fieldCode="AR" term="%22Zhang+Huai-Gang%22">Zhang Huai-Gang</searchLink><br /><searchLink fieldCode="AR" term="%22Zheng+You-Liang%22">Zheng You-Liang</searchLink><br /><searchLink fieldCode="AR" term="%22Liu+Deng-Cai%22">Liu Deng-Cai</searchLink>
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  Data: BMC Genetics, Vol 13, Iss 1, p 69 (2012)
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  Data: Abstract Background A synthetic doubled-haploid hexaploid wheat population, SynDH1, derived from the spontaneous chromosome doubling of triploid F1 hybrid plants obtained from the cross of hybrids Triticum turgidum ssp. durum line Langdon (LDN) and ssp. turgidum line AS313, with Aegilops tauschii ssp. tauschii accession AS60, was previously constructed. SynDH1 is a tetraploidization-hexaploid doubled haploid (DH) population because it contains recombinant A and B chromosomes from two different T. turgidum genotypes, while all the D chromosomes from Ae. tauschii are homogenous across the whole population. This paper reports the construction of a genetic map using this population. Results Of the 606 markers used to assemble the genetic map, 588 (97%) were assigned to linkage groups. These included 513 Diversity Arrays Technology (DArT) markers, 72 simple sequence repeat (SSR), one insertion site-based polymorphism (ISBP), and two high-molecular-weight glutenin subunit (HMW-GS) markers. These markers were assigned to the 14 chromosomes, covering 2048.79 cM, with a mean distance of 3.48 cM between adjacent markers. This map showed good coverage of the A and B genome chromosomes, apart from 3A, 5A, 6A, and 4B. Compared with previously reported maps, most shared markers showed highly consistent orders. This map was successfully used to identify five quantitative trait loci (QTL), including two for spikelet number on chromosomes 7A and 5B, two for spike length on 7A and 3B, and one for 1000-grain weight on 4B. However, differences in crossability QTL between the two T. turgidum parents may explain the segregation distortion regions on chromosomes 1A, 3B, and 6B. Conclusions A genetic map of T. turgidum including 588 markers was constructed using a synthetic doubled haploid (SynDH) hexaploid wheat population. Five QTLs for three agronomic traits were identified from this population. However, more markers are needed to increase the density and resolution of this map in the future study.
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      – SubjectFull: Crossability
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