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| 40. |  | VALLE, C. B. do; SAVIDAN, Y. H. Genetics, cytogenetics and reproductive biology of Brachiaria. In: MILES, J.W.; MAASS, B.L.; VALLE, C.B. do, ed. Brachiaria: biology, agronomy and improvement. Cali: CIAT / Brasilia: EMBRAPA-CNPGC, 1996. p.147-163. (CIAT. Pblication, 259). CNPGC.| Biblioteca(s): Embrapa Gado de Corte. |
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| Registros recuperados : 664 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Corte. Para informações adicionais entre em contato com cnpgc.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
18/03/2010 |
|
Data da última atualização: |
27/04/2010 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 2 |
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Autoria: |
SIMIONI, C.; VALLE, C. B. do. |
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Afiliação: |
CARINE SIMIONI, UFRGS; CACILDA BORGES DO VALLE, CNPGC. |
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Título: |
Chromosome duplication in Brachiaria (A. Rich.) Stapf allows intraspecific crosses. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Crop Breeding and Applied Biotechnology, v. 9, n.4, p. 328-334, 2009. |
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Idioma: |
Inglês |
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Conteúdo: |
Brachiaria decumbens cv. Basilisk is the single most important forage grass used for pastures in the tropics. Breeding to produce improved cultivars has been impossible until now due to the lack of compatible sexual ecotypes. This paper reports the success of somatic chromosome duplication of sexually reproducing diploid plants of B. decumbens and of a diploid hybrid between B. decumbens and B. brizantha, which should allow intraspecific crosses with natural apomictic tetraploid accessions of either species. Polyploidization was induced in explants cultured in vitro on a medium supplemented with colchicine at 0.01% for 48 hours, transferred to the same medium without colchicine until shoot regeneration occurred. Five sexual tetraploid plants (3.9% of plants recovered) were obtained. Crosses with apomictic cultivars recovered 14 seeds.
The novel sexual tetraploids generated were unique and represented a major breakthrough in breeding B. decumbens to obtain superior hybrids. |
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Palavras-Chave: |
Braquiária. |
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Thesagro: |
Brachiaria; Gramínea Forrageira; Melhoramento Genético Vegetal; Pastagem. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 01557naa a2200193 a 4500
001 1661788
005 2010-04-27
008 2009 bl --- 0-- u #d
100 1 $aSIMIONI, C.
245 $aChromosome duplication in Brachiaria (A. Rich.) Stapf allows intraspecific crosses.
260 $c2009
520 $aBrachiaria decumbens cv. Basilisk is the single most important forage grass used for pastures in the tropics. Breeding to produce improved cultivars has been impossible until now due to the lack of compatible sexual ecotypes. This paper reports the success of somatic chromosome duplication of sexually reproducing diploid plants of B. decumbens and of a diploid hybrid between B. decumbens and B. brizantha, which should allow intraspecific crosses with natural apomictic tetraploid accessions of either species. Polyploidization was induced in explants cultured in vitro on a medium supplemented with colchicine at 0.01% for 48 hours, transferred to the same medium without colchicine until shoot regeneration occurred. Five sexual tetraploid plants (3.9% of plants recovered) were obtained. Crosses with apomictic cultivars recovered 14 seeds. The novel sexual tetraploids generated were unique and represented a major breakthrough in breeding B. decumbens to obtain superior hybrids.
650 $aBrachiaria
650 $aGramínea Forrageira
650 $aMelhoramento Genético Vegetal
650 $aPastagem
653 $aBraquiária
700 1 $aVALLE, C. B. do
773 $tCrop Breeding and Applied Biotechnology$gv. 9, n.4, p. 328-334, 2009.
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