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Genetic variability in natural populations of Paspalum dilatatum Poir. analyzed by means of morphological traits and molecular markers
García , María Victoria
Umeå University, Faculty of Science and Technology, Ecology and Environmental Science.
Balatti, Pedro A.
Arturi, Miguel J.
2007 (English)
In:
Genetic Resources and Crop Evolution, ISSN 0925-9864, E-ISSN 1573-5109, Vol. 54, no 5, p. 935-946
Article in journal (Refereed) Published
Abstract [en]
Native species show adaptive traits that are difficult to find in introduced species. The Pampas region in Argentina is a valuable nature reserve of grasses and
Paspalum dilatatum
Poir. is one of the most important grasses found there. Based on ploidy level and on morphological traits, five biotypes of
P. dilatatum
have been described. Two of them were included in this study: a tetraploid biotype with sexual reproduction and a pentaploid biotype with apomictic reproduction. We analyzed the genetic diversity in eight native populations from the Salado basin, Argentina, using both quantitative traits and molecular data (RAPD) with these aims: to obtain information of the degree of phenotypic variation in that area, to know which the pattern of distribution of this variation is and to look for association between molecular markers with populational or biotypic differentiation. Cluster analysis based on morphological data grouped the individuals of the different populations by ploidy level. Molecular markers showed the inverse situation because individuals were grouped by geographic origin as opposed to biotype. Moreover, since RAPD did not discriminate between biotypes with sexual or apomictic reproduction, they are probably not associated with mating system. The results let us conclude that polygenic traits such as LP, LBSR, NRT and NSP can discriminate between biotypes and molecular markers such as bands 12, 40, 19 and 46 can be used to discriminate among populations, probably because they detect neutral variation.
Place, publisher, year, edition, pages
2007. Vol. 54, no 5, p. 935-946
Identifiers
URN:
urn:nbn:se:umu:diva-20317
DOI:
10.1007/s10722-006-9147-8
Scopus ID:
2-s2.0-34447092923
OAI: oai:DiVA.org:umu-20317
DiVA, id:
diva2:208403
Available from:
2009-03-18
Created:
2009-03-18
Last updated:
2023-03-23
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