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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
biochemistry, genetics and molecular biology
A radiation hybrid map of chromosome 1D reveals synteny conservation at a wheat speciation locus
Functional and Integrative Genomics, Volume 13, No. 1, Year 2013
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Description
The species cytoplasm specific (scs) genes affect nuclear-cytoplasmic interactions in interspecific hybrids. A radiation hybrid (RH) mapping population of 188 individuals was employed to refine the location of the scs ae locus on Triticum aestivum chromosome 1D. "Wheat Zapper," a comparative genomics tool, was used to predict synteny between wheat chromosome 1D, Oryza sativa, Brachypodium distachyon, and Sorghum bicolor. A total of 57 markers were developed based on synteny or literature and genotyped to produce a RH map spanning 205.2 cR. A test-cross methodology was devised for phenotyping of RH progenies, and through forward genetic, the scs ae locus was pinpointed to a 1.1 Mb-segment containing eight genes. Further, the high resolution provided by RH mapping, combined with chromosome-wise synteny analysis, located the ancestral point of fusion between the telomeric and centromeric repeats of two paleochromosomes that originated chromosome 1D. Also, it indicated that the centromere of this chromosome is likely the result of a neocentromerization event, rather than the conservation of an ancestral centromere as previously believed. Interestingly, location of scs locus in the vicinity of paleofusion is not associated with the expected disruption of synteny, but rather with a good degree of conservation across grass species. Indeed, these observations advocate the evolutionary importance of this locus as suggested by "Maan's scs hypothesis." © 2013 Springer-Verlag Berlin Heidelberg.
Authors & Co-Authors
Michalak De Jimenez, Monika K.
United States, Fargo
North Dakota State University
Bassi, Filippo M.
United States, Fargo
North Dakota State University
Ghavami, Farhad
United States, Fargo
North Dakota State University
Simons, Kristin
United States, Fargo
North Dakota State University
Dizon, R.
United States, Fargo
North Dakota State University
Seetan, Raed I.
United States, Fargo
North Dakota State University
Alnemer, Loai M.
Jordan, Amman
The University of Jordan
Denton, Anne M.
United States, Fargo
North Dakota State University
Doǧramaci, Münevver
United States, Washington, D.c.
Usda Agricultural Research Service
Šimková, Hana
Czech Republic, Prague
Institute of Experimental Botany of the Academy of Sciences of the Czech Republic
Doležel, Jaroslav
Czech Republic, Prague
Institute of Experimental Botany of the Academy of Sciences of the Czech Republic
Seth, Kiran
United States, Fargo
North Dakota State University
Luo, Ming Cheng
United States, Davis
University of California, Davis
Dvorak, Jan
United States, Davis
University of California, Davis
Gu, Yong Qiang
United States, Albany
Usda Ars Western Regional Research Center Wrrc
Kianian, Shahryar F.
United States, Fargo
North Dakota State University
Statistics
Citations: 19
Authors: 16
Affiliations: 6
Identifiers
Doi:
10.1007/s10142-013-0318-3
ISSN:
1438793X
e-ISSN:
14387948
Research Areas
Cancer
Genetics And Genomics
Study Design
Cross Sectional Study