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United States Department of Agriculture

Agricultural Research Service

Research Project: GENETIC ANALYSES AND TRAIT MAPPING TO EXPLOIT UNTAPPED GENETIC DIVERSITY IN SORGHUM

Location: Crop Germplasm Research

Title: A consensus genetic map of sorghum that integrates multiple component maps and high-throughput diversity array technology (DArT) markers

Authors
item Mace, Emma -
item Rami, Jean-Francois -
item Bouchet, Sophie -
item Klein, Patricia -
item Klein, Robert
item Kilian, Andrzej -
item Wenzl, Peter -
item Zia, Ling -
item Halloran, Kristen -
item Jordan, David -

Submitted to: Biomed Central (BMC) Plant Biology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: January 20, 2009
Publication Date: January 26, 2009
Citation: Mace, E.S., Rami, J., Bouchet, S., Klein, P.E., Klein, R.R., Kilian, A., Wenzl, P., Zia, L., Halloran, K., Jordan, D. 2009. A consensus genetic map of sorghum that integrates multiple component maps and high-throughput diversity array technology (DArT) markers. BMC Plant Biology. 9:13.

Interpretive Summary: Major advancements in science hinge on the identification of genes controlling plant and animal traits that are critically important to agriculture. Genes are tiny packets of genetic blueprint material that are found inside the cells of all plants and animals and control all of the physical characteristics of these organisms. Our work focuses on improving major grain crops and, with gene sequences, the genetic blueprint will be visible and this information can make improving the plants more efficient. This study is a detailed genetic map, which is critical in discovering those genes controlling important physical characteristics including grain yield and quality. This detailed, consensus genetic map will permit more efficient identification of important plant genes, and will allow scientists to understand those key features of the genetic blueprint that make sorghum the desired crop for US producers. Information will be primarily used by fellow scientists but the work will ultimately result in better adapted, higher producing crop varieties available to American farmers.

Technical Abstract: This final consensus map has allowed us to map a larger number of markers than possible in any individual map of sorghum, to obtain a more complete coverage of the sorghum genome and to fill a number of gaps on individual maps. In addition to overall general consistency of marker order across individual component maps, good agreement in overall distances between common marker pairs across the component maps used in this study was determined, using a difference ratio calculation. The obtained consensus map can be used as a reference resource for genetic studies in different genetic backgrounds, in addition to providing a framework for transferring genetic information between different marker technologies and for integrating Diverse Array Technology markers with other genomic resources. Diverse Array Technology markers represent an affordable, high throughput marker system with great utility in molecular breeding programs, especially in crops such as sorghum where SNP arrays are not publicly available.

Last Modified: 9/23/2014
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