Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/108672
Type: Artigo de periódico
Title: Mating Systems In Tropical Forages: Stylosanthes Capitata Vog. And Stylosanthes Guianensis (aubl.) Sw
Author: de Santos-Garcia M.O.
Resende R.M.S.
Chiari L.
Zucchi M.I.
de Souza A.P.
Abstract: Stylosanthes capitata and S. guianensis are important forage legumes for tropical areas. The only available estimates of S. capitata and S. guianensis outcrossing rates were based on morphological markers, and the genus is considered as being mainly self-pollinated. Here we describe an estimation of the outcrossing rate in S. capitata and S. guianensis using microsatellite markers. The outcrossing rates were estimated in S. capitata and S. guianensis open-pollinated populations of 20 progenies consisting of ten individuals each. The multi locus outcrossing rate for S. capitata was estimated using 10 polymorphic loci, whereas five microsatellites were used for S. guianensis. The multi locus outcrossing rates for S. capitata and S. guianensis were 31 and 26%, respectively, suggesting a mixed mating system with predominance of autogamy. Comparison of single locus and multi locus estimates of outcrossing rates indicated that little inbreeding other than selfing occurred. The estimated Wright's fixation index of the parental generation was lower than expected based on the multi locus outcrossing rate, possibly resulting from the use of some heterozygous breeding genotypes for the study. The data on the outcrossing rate described here are potentially useful for breeding programs and for maintenance of germplasm collections of these Stylosanthes species. © 2010 Springer Science+Business Media B.V.
Editor: 
Rights: fechado
Identifier DOI: 10.1007/s10681-010-0293-x
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-79951774416&partnerID=40&md5=81d925f0ce5c2c972e9bd017d6411f11
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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