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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
11/08/2004 |
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Data da última atualização: |
29/08/2023 |
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Autoria: |
LIU, C. J. |
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Título: |
Geographical distribution of genetic variation in Stylosanthes scabra revealed by RAPD analysis. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Euphytica, v. 98, p. 21-27, 1997. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: A large number of S. scabra accessions have been accumulated worldwide. The majority of them were collected from Brazil and most of the others came from either Colombia or Venezuela. One hundred of these accessions, selected to represent the geographical distribution of the S. scabra collection held at the Australian Tropical Forages Genetic Resource Centre, were analysed using RAPD as markers. Seven of these accessions were found not to be S. scabra. Of the S. scabra accessions, the average dissimilarity value among Brazilian accessions (0.053) was much lower than that among Colombian (0.074) or Venezuelan (0.088) accessions, with an overall dissimilarity value of 0.059 among aIl the S. scabra accessions. Based on their dissimilarity values, most of these accessions could be separated into five groups. Geographical distributions for most accessions in each of these groups were weIl defined. Limited long distance introductions/dispersions of S. scabra between these regions were detected and they were mainIy confined to Brazilian genotypes. The clustering results based on RAPDv iere compared with those based on morphological-agronomical characters, and the groups produced by the two different methods did not always match. Possible reasons for this discrepancy are discussed. |
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Palavras-Chave: |
RAPD; Stilosante. |
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Thesagro: |
Stylosanthes Scabra; Variação Genética. |
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Thesaurus Nal: |
Genetic variation; Geographical distribution. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 01873naa a2200193 a 4500
001 1530685
005 2023-08-29
008 1997 bl uuuu u00u1 u #d
100 1 $aLIU, C. J.
245 $aGeographical distribution of genetic variation in Stylosanthes scabra revealed by RAPD analysis.$h[electronic resource]
260 $c1997
520 $aAbstract: A large number of S. scabra accessions have been accumulated worldwide. The majority of them were collected from Brazil and most of the others came from either Colombia or Venezuela. One hundred of these accessions, selected to represent the geographical distribution of the S. scabra collection held at the Australian Tropical Forages Genetic Resource Centre, were analysed using RAPD as markers. Seven of these accessions were found not to be S. scabra. Of the S. scabra accessions, the average dissimilarity value among Brazilian accessions (0.053) was much lower than that among Colombian (0.074) or Venezuelan (0.088) accessions, with an overall dissimilarity value of 0.059 among aIl the S. scabra accessions. Based on their dissimilarity values, most of these accessions could be separated into five groups. Geographical distributions for most accessions in each of these groups were weIl defined. Limited long distance introductions/dispersions of S. scabra between these regions were detected and they were mainIy confined to Brazilian genotypes. The clustering results based on RAPDv iere compared with those based on morphological-agronomical characters, and the groups produced by the two different methods did not always match. Possible reasons for this discrepancy are discussed.
650 $aGenetic variation
650 $aGeographical distribution
650 $aStylosanthes Scabra
650 $aVariação Genética
653 $aRAPD
653 $aStilosante
773 $tEuphytica$gv. 98, p. 21-27, 1997.
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