| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Unidades Centrais. |
|
Data corrente: |
08/01/1997 |
|
Data da última atualização: |
07/10/2021 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
GUIMARÃES, E. P.; BORRERO, J.; OSPINA-REY, Y. |
|
Afiliação: |
ELCIO PERPETUO GUIMARAES, CNPAF; JAIME BORRERO, CIAT; YOLIMA OSPINA-REY, CIAT. |
|
Título: |
Genetic diversity of upland rice germplasm distributed in Latin America. |
|
Ano de publicação: |
1996 |
|
Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, v. 31, n. 3, p. 187-194, mar. 1996. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Narrow genetic base has been a concern in irrigated rice. Upland rice varieties in Latin America show a similar trend. The parentage of 2,061 upland crosses and 271 advanced lines that CIAT (Centro Internacional de Agricultura Tropical) distributed to partners was traced back to the immediate parents; the yearly percentage participation was estimated. The main objectives were to assess the genetic variability used and distributed by CIAT, to identify reasons why genetic diversity is eliminated, and to propose alternatives for broadening the genetic base. African germplasm contributed to 46.0% of the parents used in crosses and 34.6% in the advanced lines. A maximum of 12 and a minimum of 4 lines were necessary to make up 50% of the participation frequency in crosses every year; globally it required 16 lines. Intense selection pressure for agronomically important traits, such as plant type and blast resistance, eliminated between 17.6 and 69.0% of the early segregating lines every year. Sharing germplasm at early stages of development and population improvement through recurrent selection are alternatives that offer broad-base germplasm to Programs in Latin America. |
|
Palavras-Chave: |
America Latina; Ampliacao da base genetica; Base; Broadening genetic base; Diversidade. |
|
Thesagro: |
Arroz; Genética; Oryza Sativa. |
|
Thesaurus Nal: |
rice. |
|
Categoria do assunto: |
--
G Melhoramento Genético |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/19273/1/pab96_05_mar.pdf
|
|
Marc: |
LEADER 01873naa a2200253 a 4500
001 1205823
005 2021-10-07
008 1996 bl uuuu u00u1 u #d
100 1 $aGUIMARÃES, E. P.
245 $aGenetic diversity of upland rice germplasm distributed in Latin America.
260 $c1996
520 $aNarrow genetic base has been a concern in irrigated rice. Upland rice varieties in Latin America show a similar trend. The parentage of 2,061 upland crosses and 271 advanced lines that CIAT (Centro Internacional de Agricultura Tropical) distributed to partners was traced back to the immediate parents; the yearly percentage participation was estimated. The main objectives were to assess the genetic variability used and distributed by CIAT, to identify reasons why genetic diversity is eliminated, and to propose alternatives for broadening the genetic base. African germplasm contributed to 46.0% of the parents used in crosses and 34.6% in the advanced lines. A maximum of 12 and a minimum of 4 lines were necessary to make up 50% of the participation frequency in crosses every year; globally it required 16 lines. Intense selection pressure for agronomically important traits, such as plant type and blast resistance, eliminated between 17.6 and 69.0% of the early segregating lines every year. Sharing germplasm at early stages of development and population improvement through recurrent selection are alternatives that offer broad-base germplasm to Programs in Latin America.
650 $arice
650 $aArroz
650 $aGenética
650 $aOryza Sativa
653 $aAmerica Latina
653 $aAmpliacao da base genetica
653 $aBase
653 $aBroadening genetic base
653 $aDiversidade
700 1 $aBORRERO, J.
700 1 $aOSPINA-REY, Y.
773 $tPesquisa Agropecuária Brasileira$gv. 31, n. 3, p. 187-194, mar. 1996.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Trigo. |
|
Data corrente: |
17/07/2015 |
|
Data da última atualização: |
09/05/2017 |
|
Tipo da produção científica: |
Folder/Folheto/Cartilha |
|
Autoria: |
TOMM, G. O.; FERREIRA, P. E. P.; VIEIRA, V. M. |
|
Afiliação: |
GILBERTO OMAR TOMM, CNPT; PAULO ERNANI PERES FERREIRA, CNPT; VLADIRENE MACEDO VIEIRA, CNPT. |
|
Título: |
Canola: híbridos avaliados em rede coordenada pela Embrapa. |
|
Ano de publicação: |
2014 |
|
Fonte/Imprenta: |
Passo Fundo: Embrapa Trigo, 2014. |
|
Descrição Física: |
1 folder. 6 p. |
|
Idioma: |
Português |
|
Thesagro: |
Colza. |
|
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/126853/1/FD-0387.pdf
|
|
Marc: |
LEADER 00394nam a2200145 a 4500
001 2020028
005 2017-05-09
008 2014 bl uuuu u0uu1 u #d
100 1 $aTOMM, G. O.
245 $aCanola$bhíbridos avaliados em rede coordenada pela Embrapa.
260 $aPasso Fundo: Embrapa Trigo$c2014
300 $c1 folder. 6 p.
650 $aColza
700 1 $aFERREIRA, P. E. P.
700 1 $aVIEIRA, V. M.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Trigo (CNPT) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
