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Provedor de dados:  Scientia Agricola
País:  Brazil
Título:  Morphological characterization and reproductive aspects in genetic variability studies of forage peanut
Autores:  Oliveira,Marilda Augusta Peres
Valls,José Francisco Montenegro
Data:  2003-01-01
Ano:  2003
Palavras-chave:  Crossability
Wild peanut
Resumo:  Morphological characterization and the study of reproductive behavior are important procedures to identify desirable traits of progenitors to be included in breeding programs. Morphological descriptors and the reproductive behavior of parental accessions of the legumes Arachis pintoi Krapov & W.C.Gregory and A. repens Handro were analyzed looking for the probable causes of seed production variability. Morphological and reproductive characterization were used for the estimation of the genetic variability of five A. pintoi and two A. repens accessions, with crosses being conducted in a greenhouse. Parents and hybrids have shown high pollen stainability, regular meiosis (2n=20), and presented distinctive reproductive behaviors: A. pintoi accessions GK 12787, V 13468 and V 6791-wf are prolific seed producers, while A. pintoi V 13167, V 13338 and A. repens Nc 1579 and Nc 1578, rarely produce seeds. Intraspecific crosses generated fertile F1 and F2 hybrids from five combinations. Interspecific crosses produced sterile F1 hybrids. Stigma morphology and distinct mode of reproduction present among accessions suggest possible barriers for seed production in some cross-combinations. Euclidian distance range between parents was 0.20 to 5.52. Accessions GK 12787 and Nc 1579 presented the maximum distance: 5.52, and V 13468 and Nc 1579 the minimum distance: 0.20. The Euclidian distance was considered an adequate methodology to study genetic diversity of parental accessions.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação:  10.1590/S0103-90162003000200014
Formato:  text/html
Fonte:  Scientia Agricola v.60 n.2 2003
Direitos:  info:eu-repo/semantics/openAccess

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