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Population structure and diversity in Valencia peanut germplasm collection

OAR@ICRISAT

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Relation http://oar.icrisat.org/110/
http://dx.doi.org/10.2135/cropsci2010.08.0452
 
Title Population structure and diversity in Valencia peanut germplasm collection
 
Creator Kottapalli, P
Upadhyaya, H D
Kottapalli, K R
Payton, P
Dwivedi, S L
Burow, M
David, K O
Sanogo, S
Puppala, N
 
Subject Groundnut
 
Description Valencia peanuts [Arachis hypogaea L. subsp.
fastigiata Waldron var. fastigiata (Waldron)
Krapov. & W. C. Greg.] are well known for their
in-shell market value. Assessment of genetic
diversity is key to the success of developing
improved cultivars with desirable agronomic
and quality traits. Seventy-eight U.S. Valencia
core collection accessions together with 36
Valencia accessions representing the global
peanut mini-core collection were used to study
population structure and diversity and to identify
genetically diverse Valencia germplasm for use
in peanut breeding. Fifty-two simple sequence
repeats loci amplifi ed 683 alleles, with an average
of 13 alleles per locus. The mean polymorphism
information content and gene diversity,
respectively, were 0.270 and 0.335. The pairwise
genetic distance ranged from 0.143 to
0.474, with an average of 0.631. Neighbor-joining
clustering, principal coordinate analysis, and
STRUCTURE analysis consistently separated
the Valencia germplasm into fi ve clusters with
two distinct major groups. The fi rst major group
consisted of genotypes from South America
(64%) with few accessions from Africa, North
America, Caribbean, and European regions. The
second group consisted of accessions mostly
from diverse regions of Africa, North and South
America, Asia, and the Caribbean. However, the
structuring was not related to the geographic
origin and several admixtures were observed.
The information generated in this study and
phenotyping of this material for biotic and abiotic
stress responses and yield-quality traits will
facilitate selection of trait-specifi c, genetically
diverse parents for developing Valencia peanut
cultivars with a broad genetic base.
 
Publisher Crop Science Society of America
 
Date 2011
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/110/1/cs-51-3-1089-1100-2011.pdf
Kottapalli, P and Upadhyaya, H D and Kottapalli, K R and Payton, P and Dwivedi, S L and Burow, M and David, K O and Sanogo, S and Puppala, N (2011) Population structure and diversity in Valencia peanut germplasm collection. Crop Science, 51 (3). pp. 1089-1100.