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| Borba,Tereza Cristina de Oliveira; Mendes,Clistiane dos Anjos; Guimarães,Élcio Perpétuo; Brunes,Tuliana Oliveira; Fonseca,Jaime Roberto; Brondani,Rosana Vianello; Brondani,Claudio. |
| The objective of this study was to evaluate the genetic variability of rice (Oryza sativa) landraces collected in Brazilian small farms. Twelve simple sequence repeat (SSR) markers characterized 417 landraces collected in 1986, 1987 and 2003, in the state of Goiás, Brazil. The number of landraces with long and thin grain type increased in the evaluated period, probably due to market demand. Based on the molecular data, the genetic variability increased during this period and, as per to the factorial correspondence analysis, most of the accessions were grouped according to the year of collection. The incorporation of modern rice cultivars in landrace cultivation areas and the selection carried out by small farmers are the most probable factors responsible... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Genotyping; Microsatellites; Participatory breeding; Rice breeding. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000700009 |
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| Barros,Luciane Bertoletti; Moreira,Rosângela Maria Pinto; Ferreira,Josué Maldonado. |
| Knowledge of the association between characters is very important in the genetic breeding programs, but there is limited information about correlations between traits in maize landraces in the current literature. The objectives of this study were to estimate phenotypic, additive genetic and environment correlations among traits in maize landraces, which were cultivated in family farm systems, in order to guide the participatory breeding on maize landraces. Between 294 and 400 half-sib progenies from the six populations were evaluated, subdivided in triple 7X7 and 10X10 lattice design, respectively, with single row plots of 4 m long and spaced 1.00 × 0.20 m. Estimates of correlation coefficients are reported for nine traits: grain yield (GY), relation grain... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Population; Recurrent selection; Participatory breeding. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000600010 |
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