Population structure in sorghum accessions from West Africa differing in race and maturity class

Bhosale, S U and Stich, B and Rattunde, H F W and Weltzien, E and Haussmann, B I G and Hash, C T and Melchinger, A E and Parzies, H K (2011) Population structure in sorghum accessions from West Africa differing in race and maturity class. Genetica, 139 (4). pp. 453-463. ISSN 0016-6707

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Abstract

Accounting for population structure to minimize spurious associations in association analyses is of crucial importance. With sorghum genomic sequence information being available, there is a growing interest in performing such association studies for a number of important agronomic traits using a candidate gene approach. The aims of our study were to conduct a systematic survey of molecular genetic diversity and analyze the population structure in cultivated sorghum [Sorghum bicolor (L.) Moench] accessions from West Africa. Our analysis included 219 West African cultivated sorghum accessions with differing maturity intended for a markertrait association study. A total of 27 SSRs were used, which resulted in detection of 513 alleles. Genetic diversity estimates for the accessions were found to be high. The accessions were divided into two subgroups using a modelbased approach. Our findings partly agree with previous studies in that the guinea race accessions could be distinguished clearly from other accessions included in the analysis. Race and geographical origin of the accessions may be responsible for the structure we observed in our material. The extent of linkage disequilibrium for all combinations of SSRs was in agreement with expectations based on the mating system.

Item Type:	Article
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Uncontrolled Keywords:	Sorghum; Genetic diversity; Population; structure; Linkage disequilibrium
Agro Tags:	<b>Agrotags</b> - sorghum | genetics | locus | alleles | genes | social groups | dna | genomes | sorghum bicolor | developmental stages <br><b>Fishtags</b> - NOT-AVAILABLE<br><b>Geopoliticaltags</b> - guinea | africa | mali | niger | west africa | nigeria | burkina faso | usa | germany | new york
Subjects:	Mandate crops > Sorghum
Depositing User:	Siva Shankar
Date Deposited:	27 May 2011 07:25
Last Modified:	07 Feb 2014 05:14
URI:	http://oar.icrisat.org/id/eprint/42
Official URL:	http://dx.doi.org/10.1007/s10709-011-9564-2
Projects:	UNSPECIFIED
Funders:	BMZ
Acknowledgement:	This research was funded by the Federal Ministry for Economic Cooperation and Development, Germany (ICRISAT/ GTZ Project No. 05.7860.9-001.00). We thank two anonymous reviewers for their valuable comments.
Links:	Author

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