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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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| Pinheiro,Letícia da Silveira; Rangel,Paulo Hideo Nakano; Vianello,Rosana Pereira; Brondani,Claudio. |
| The objective of this work was to determine the effect of male sterility or manual recombination on genetic variability of rice recurrent selection populations. The populations CNA-IRAT 4, with a gene for male sterility, and CNA 12, which was manually recombined, were evaluated. Genetic variability among selection cycles was estimated using14 simple sequence repeat (SSR) markers. A total of 926 plants were analyzed, including ten genitors and 180 individuals from each of the evaluated cycles (1, 2 and 5) of the population CNA-IRAT 4, and 16 genitors and 180 individuals from each of the cycles (1 and 2) of CNA 12. The analysis allowed the identification of alleles not present among the genitors for both populations, in all cycles, especially for the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Allele variation; Rice breeding; Molecular markers; Population improvement. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000600011 |
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