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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
05/08/2011 |
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Data da última atualização: |
08/08/2011 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BOLDRINI, K. R.; PAGLIARINI, M. S.; VALLE, C. B. do. |
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Afiliação: |
KELLEN REGINA BOLDRINI, UEM; M. S. PAGLIARINI, UEM; CACILDA BORGES DO VALLE, CNPGC. |
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Título: |
Evidence of natural hybridization in Brachiaria humidicola (Rendle) Schweick. (Poaceae: Panicoideae: Paniceae). |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
Journal of Genetics, v. 89, n. 1, p.91-94, Apr. 2010. |
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Idioma: |
Inglês |
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Conteúdo: |
Polyploidy and aneuploidy are conspicuous features of chromosomal evolution in the Poaceae; at least 80% of grass species are of polyploid origin (Stebbins 1985). The original basic chromosome number for the Poaceae is not known and has been the subject of much speculation. In the large tribe Paniceae, which includes the genus Brachiaria, the most common basic chromosome number is x = 9 (DeWet 1986). The predominance of x = 9 in Brachiaria genus had been reported in several studies (Basappa et al. 1987; Honfi et al. 1990; Bernini and Marin-Morales 2001; Mendes-Bonato et al. 2002, 2006; Utsunomiya et al. 2005). More recently, a new chromosome number, x = 6, was determined for B. dictyoneura (Risso-Pascotto et al. 2006). There is a large predominance of polyploid forms in the genus Brachiaria and tetraploids prevail. The origin of polyploidy, however, has never been pursued in this genus. Cytological evidence from analysis of meiotic behaviour, including chromosome pairing at diakinesis, led to the suggestion that autotetraploidy and segmental allopolyploidy could have contributed to evolution in some species (Mendes-Bonato et al. 2002, 2006;Utsunomiya et al. 2005). On the other hand, in two pentaploid accessions of B. brizantha (2n = 5x = 45) there was clear evidence of allopolyploidy (Mendes et al. 2006). This paper reports the unusual cytological behaviour during meiosis in one accession of Brachiaria humidicola from the Embrapa Beef Cattle germplasm collection. |
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Thesagro: |
Brachiaria Humidicola; Melhoramento Genético Vegetal; Pastagem. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/39338/1/journal-of-genetics.pdf
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Marc: |
LEADER 02076naa a2200181 a 4500
001 1897403
005 2011-08-08
008 2010 bl uuuu u00u1 u #d
100 1 $aBOLDRINI, K. R.
245 $aEvidence of natural hybridization in Brachiaria humidicola (Rendle) Schweick. (Poaceae$bPanicoideae: Paniceae).$h[electronic resource]
260 $c2010
520 $aPolyploidy and aneuploidy are conspicuous features of chromosomal evolution in the Poaceae; at least 80% of grass species are of polyploid origin (Stebbins 1985). The original basic chromosome number for the Poaceae is not known and has been the subject of much speculation. In the large tribe Paniceae, which includes the genus Brachiaria, the most common basic chromosome number is x = 9 (DeWet 1986). The predominance of x = 9 in Brachiaria genus had been reported in several studies (Basappa et al. 1987; Honfi et al. 1990; Bernini and Marin-Morales 2001; Mendes-Bonato et al. 2002, 2006; Utsunomiya et al. 2005). More recently, a new chromosome number, x = 6, was determined for B. dictyoneura (Risso-Pascotto et al. 2006). There is a large predominance of polyploid forms in the genus Brachiaria and tetraploids prevail. The origin of polyploidy, however, has never been pursued in this genus. Cytological evidence from analysis of meiotic behaviour, including chromosome pairing at diakinesis, led to the suggestion that autotetraploidy and segmental allopolyploidy could have contributed to evolution in some species (Mendes-Bonato et al. 2002, 2006;Utsunomiya et al. 2005). On the other hand, in two pentaploid accessions of B. brizantha (2n = 5x = 45) there was clear evidence of allopolyploidy (Mendes et al. 2006). This paper reports the unusual cytological behaviour during meiosis in one accession of Brachiaria humidicola from the Embrapa Beef Cattle germplasm collection.
650 $aBrachiaria Humidicola
650 $aMelhoramento Genético Vegetal
650 $aPastagem
700 1 $aPAGLIARINI, M. S.
700 1 $aVALLE, C. B. do
773 $tJournal of Genetics$gv. 89, n. 1, p.91-94, Apr. 2010.
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Registro original: |
Embrapa Gado de Corte (CNPGC) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Algodão. Para informações adicionais entre em contato com cnpa.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Algodão. |
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Data corrente: |
04/10/2022 |
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Data da última atualização: |
05/02/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ARAÚJO, F. dos S.; ARRIEL, N. H. C.; MEDEIROS, E. P. de; LIMA, L. M. de; SOUZA, M. A. de; ANDRADE, A. P. de; BRUNO, R. de L. A. |
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Afiliação: |
FERNANDO DOS SANTOS ARAÚJO, UFAPE; NAIR HELENA CASTRO ARRIEL, CNPA; EVERALDO PAULO DE MEDEIROS, CNPA; LIZIANE MARIA DE LIMA, CNPA; MAYARA ANDRADE DE SOUZA, CESMAC; ALBERÍCIO PEREIRA DE ANDRADE, UFAPE; RISELANE DE LUCENA ALCÂNTARA BRUNO, UFAPE. |
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Título: |
Multi-level characterization of perennial cotton (Gossypium hirsutum L. race marie-galante Hutch.) populations from the northeastern Brazil to the breeding and conservation of this germplasm. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Genetic Resources and Crop Evolution, v. 69, p. 1219-1227, 2022. |
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ISSN: |
1573-5109 |
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DOI: |
https://doi.org/10.1007/s10722-021-01299-x |
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Idioma: |
Inglês |
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Conteúdo: |
The remaining populations of perennial cotton (Gossypium hirsutum L. r. marie-galante Hutch.) that occur in northeastern Brazil are part of the primary gene pool for the creation of modern upland cotton cultivars. Therefore, we present fiber technological properties, genetic diversity and population structure analysis of four populations of G. hirsutum L. r. marie-galante from Para&305;´ba state in Brazil, using the High-Volume Instrument (HVI) analytical system and Inter Simple Sequence Repeats (ISSRs) polymorphic loci, respectively. The fiber technological properties differed between populations. The average length, resistance, micronaire index, maturity index and count-strength-product of the populations are consistent with the fiber quality traits present in commercial upland cotton cultivars. The populations showed low levels of total (HT= 0.1305) and intrapopulation (HS = 0.0806) genetic diversity, besides high genetic differentiation (GST= 0.3824) and low indirect gene flow (Nm = 0.875) and are structured in two gene clusters by Bayesian inference. The positive relationship between genetic distance and geographical distance using the Mantel test (r=0.8364; p value=0.0038) suggests that genetic divergence among populations can be explained by spatial isolation. This information can support genetic conservation and the valuation of these populations for cotton breeding programs. |
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Palavras-Chave: |
Cultivation; Diversidade genética. |
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Thesagro: |
Algodão; Cultivo Perene; Gossypium Hirsutum Marie Galante; Landrace; Melhoramento Genético Vegetal. |
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Thesaurus NAL: |
Cotton; Genetically modified plants; Gossypium; Landraces; Perennials; Semiarid soils; Species diversity. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 02658naa a2200385 a 4500
001 2147114
005 2023-02-05
008 2022 bl uuuu u00u1 u #d
022 $a1573-5109
024 7 $ahttps://doi.org/10.1007/s10722-021-01299-x$2DOI
100 1 $aARAÚJO, F. dos S.
245 $aMulti-level characterization of perennial cotton (Gossypium hirsutum L. race marie-galante Hutch.) populations from the northeastern Brazil to the breeding and conservation of this germplasm.$h[electronic resource]
260 $c2022
520 $aThe remaining populations of perennial cotton (Gossypium hirsutum L. r. marie-galante Hutch.) that occur in northeastern Brazil are part of the primary gene pool for the creation of modern upland cotton cultivars. Therefore, we present fiber technological properties, genetic diversity and population structure analysis of four populations of G. hirsutum L. r. marie-galante from Para&305;´ba state in Brazil, using the High-Volume Instrument (HVI) analytical system and Inter Simple Sequence Repeats (ISSRs) polymorphic loci, respectively. The fiber technological properties differed between populations. The average length, resistance, micronaire index, maturity index and count-strength-product of the populations are consistent with the fiber quality traits present in commercial upland cotton cultivars. The populations showed low levels of total (HT= 0.1305) and intrapopulation (HS = 0.0806) genetic diversity, besides high genetic differentiation (GST= 0.3824) and low indirect gene flow (Nm = 0.875) and are structured in two gene clusters by Bayesian inference. The positive relationship between genetic distance and geographical distance using the Mantel test (r=0.8364; p value=0.0038) suggests that genetic divergence among populations can be explained by spatial isolation. This information can support genetic conservation and the valuation of these populations for cotton breeding programs.
650 $aCotton
650 $aGenetically modified plants
650 $aGossypium
650 $aLandraces
650 $aPerennials
650 $aSemiarid soils
650 $aSpecies diversity
650 $aAlgodão
650 $aCultivo Perene
650 $aGossypium Hirsutum Marie Galante
650 $aLandrace
650 $aMelhoramento Genético Vegetal
653 $aCultivation
653 $aDiversidade genética
700 1 $aARRIEL, N. H. C.
700 1 $aMEDEIROS, E. P. de
700 1 $aLIMA, L. M. de
700 1 $aSOUZA, M. A. de
700 1 $aANDRADE, A. P. de
700 1 $aBRUNO, R. de L. A.
773 $tGenetic Resources and Crop Evolution$gv. 69, p. 1219-1227, 2022.
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Embrapa Algodão (CNPA) |
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