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|Title:||Using genetic diversity information to establish core collections of Stylosanthes capitata and Stylosanthes macrocephala|
de Toledo-Silva, G.
Simeão Resende, R.
de Souza, A.
|Citation:||Genetics and Molecular Biology, 2012; 35(4):847-861|
|Publisher:||Sociedade Brasileira de Genética|
|Melissa Oliveira Santos-Garcia, Guilherme de Toledo-Silva, Rodrigo Possidonio Sassaki, Thais Helena Ferreira, Rosângela Maria Simeão Resende, Lucimara Chiari, Cláudio Takao Karia, Marcelo Ayres Carvalho, Fábio Gelape Faleiro, Maria Imaculada Zucchi and Anete Pereira de Souza|
|Abstract:||Stylosanthes species are important forage legumes in tropical and subtropical areas. S. macrocephala and S. capitata germplasm collections that consist of 134 and 192 accessions, respectively, are maintained at the Brazilian Agricultural Research Corporation Cerrados (Embrapa-Cerrados). Polymorphic microsatellite markers were used to assess genetic diversity and population structure with the aim to assemble a core collection. The mean values of H(O) and H(E) for S. macrocephala were 0.08 and 0.36, respectively, whereas the means for S. capitata were 0.48 and 0.50, respectively. Roger's genetic distance varied from 0 to 0.83 for S. macrocephala and from 0 to 0.85 for S. capitata. Analysis with STRUCTURE software distinguished five groups among the S. macrocephala accessions and four groups among those of S. capitata. Nei's genetic diversity was 27% in S. macrocephala and 11% in S. capitata. Core collections were assembled for both species. For S. macrocephala, all of the allelic diversity was represented by 23 accessions, whereas only 13 accessions were necessary to represent all allelic diversity for S. capitata. The data presented herein evidence the population structure present in the Embrapa-Cerrados germplasm collections of S. macrocephala and S. capitata, which may be useful for breeding programs and germplasm conservation.|
|Keywords:||Stylosanthes; tropical forage; microsatellites; genetic diversity; core collection|
|Rights:||Copyright © 2012, Sociedade Brasileira de Genética|
|Appears in Collections:||Agriculture, Food and Wine publications|
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