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Diversity analysis of 3365 sorghums in the GCP composite germplasm set based on allelic variation at 41 SSR loci

OAR@ICRISAT

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Relation http://oar.icrisat.org/5170/
 
Title Diversity analysis of 3365 sorghums in the GCP composite germplasm set based on allelic variation at 41 SSR loci
 
Creator Hash, C T
etal, .
 
Subject Agriculture-Farming, Production, Technology, Economics
 
Description The GCP Global Composite Germplasm Collection of 3372 wild and
cultivated sorghums includes 280 elite breeding lines and improved
cultivars, 250 Chinese germplasm lines to be provided by CAAS, 64
wild accessions, and >3000 landrace accessions selected from
previously defined core collections, for resistance/tolerance to
production constraints, and/or for variation in other traits. A set of 48
sorghum SSR markers distributed across all ten linkage groups was
chosen following preliminary analysis of 48 diverse genotypes with
104 available SSRs complemented by additional SSRs from CIRAD
and ICRISAT. Diversity analysis was performed on 3367 accessions
genotyped with 41 SSRs by CIRAD and ICRISAT.. Breeding lines
and wild accessions clustered separately from landraces, which
exhibited structure explainable by geographic origin. Landrace
population substructure was further characterized within racial
groups (five basic races and ten hybrid races). Race bicolor showed
little evidence of population structure, congruent with it being the
original domesticate. Race kafir (largely from Southern Africa) was
distinct. Accessions of the durra, caudatum and guinea races each
formed four distinct geographic subgroups. The guinea race
margaritiferum group formed its own cluster, suggesting
independent domestication. Intermediate races behaved similarly. A
reference subset of 384 accessions was then defined for allele
mining.
 
Date 2007
 
Type Conference or Workshop Item
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/5170/1/Diversity%20analysis%20of%203365%20sorghums%20in%20the%20GCP%20composite%20ger.pdf
Hash, C T and etal, . (2007) Diversity analysis of 3365 sorghums in the GCP composite germplasm set based on allelic variation at 41 SSR loci. In: Generation Challenge Programme: Annual Research Meeting, 12–16 Sep 2007, Benoni, South Africa.