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Registro Completo |
Biblioteca(s): |
Embrapa Agropecuária Oeste; Embrapa Mandioca e Fruticultura; Embrapa Meio Norte / UEP-Parnaíba; Embrapa Meio-Norte; Embrapa Semiárido; Embrapa Unidades Centrais. |
Data corrente: |
09/09/2004 |
Data da última atualização: |
18/05/2016 |
Autoria: |
SOARES FILHO, W. dos S.; VILARINHOS, A. D.; ALVES, A. A. C.; CUNHA SOBRINHO, A. P.; OLIVEIRA, A. A. R.; SOUZA, A. da S.; LEDO, C. A. da S.; CRUZ, J. L.; SOUZA, L. D.; CASTRO NETO, M. T. de; GUERRA FILHO, M. dos S.; PASSOS, O. S.; MEISSNER FILHO, P. E. |
Título: |
Citrus breeding program at Embrapa Cassava & Fruits: development of hybrids. |
Ano de publicação: |
2003 |
Fonte/Imprenta: |
Cruz das Almas: Embrapa Mandioca e Fruticultura, 2003. |
Páginas: |
39 p. |
Série: |
(Embrapa Mandioca e Fruticultura. Documentos, 107). |
ISSN: |
1516-5728 |
Idioma: |
Inglês Português |
Conteúdo: |
In order to obtain new citrus varieties, better adapted to tropical conditions, the Embrapa - National Cassava & Fruits Research Center (CNPMF), as known as Embrapa Cassava & Fruits, has started in September 1988 a hybridization program based on its own Active Germplasm Bank, which shows a great genetic variability, represented for about 700 accesses, comprising several Citrus species and varieties, besides close relative genera, among which are inclused Poncirus, Fortunella, Microcitrus, Eremocitrus and Severinia, among others of smaller importance, under the point of view of genetic improvement. The program was set up due to the relatively low longevity of the citurs orchards, whose life span is around 15 to 18 years in the main producing areas of São Paulo State, that represents about 75% of the Brazilian production, and from 12 to 15 years in the North and Northeast regions of the country. As immediate objectives, the program aims at selection of genotypes, particularly rootstocks, tolerant to drought conditions and aluminum toxicity, resistant to diseases such as Phytophthora root rot and Citrus Tristeza Virus - CTV, and adapted to high density tree population. A multidisciplinary research group is involved in these studies and several research activities are underway, mainly: a) hybridization, including varieties of high agronomic valoe and/or adaptive potential to grow in abiotic and biotic stresses; b) identification of hybrid embryos and early identification of zygotic seedlings by analysis of foliar morphology, isoenzymes, polymorphic DNA segments and chromosome banding; c) studies concerned to in vitro cultivation of citrus embryos, as well as to the complement of the embryogenesis of zygotic embryos starting from early stages, avoiding or restricting the presence of nucellar embryos, particularly in polyembryonic varieties, used as female parents in artificial hybridizations; d) identification of promising parents regarding to obtaining new hybrid varieties, rootstocks and scions; e) definition of methodologies for early selection of hybrids tolerant to drought and aluminum toxicity, as well as resistant to Phytophthora root rot and CTV; f) establishment of methodologies for early flowering induction, aiming at shortening the pre-reproductive period of selected hybrids; g) development of somatic hybrids by protoplast fusion. MenosIn order to obtain new citrus varieties, better adapted to tropical conditions, the Embrapa - National Cassava & Fruits Research Center (CNPMF), as known as Embrapa Cassava & Fruits, has started in September 1988 a hybridization program based on its own Active Germplasm Bank, which shows a great genetic variability, represented for about 700 accesses, comprising several Citrus species and varieties, besides close relative genera, among which are inclused Poncirus, Fortunella, Microcitrus, Eremocitrus and Severinia, among others of smaller importance, under the point of view of genetic improvement. The program was set up due to the relatively low longevity of the citurs orchards, whose life span is around 15 to 18 years in the main producing areas of São Paulo State, that represents about 75% of the Brazilian production, and from 12 to 15 years in the North and Northeast regions of the country. As immediate objectives, the program aims at selection of genotypes, particularly rootstocks, tolerant to drought conditions and aluminum toxicity, resistant to diseases such as Phytophthora root rot and Citrus Tristeza Virus - CTV, and adapted to high density tree population. A multidisciplinary research group is involved in these studies and several research activities are underway, mainly: a) hybridization, including varieties of high agronomic valoe and/or adaptive potential to grow in abiotic and biotic stresses; b) identification of hybrid embryos and early identification of zyg... Mostrar Tudo |
Palavras-Chave: |
Bandeamento cromossômico; Citros; Citrus trieza virus; Cultura de tecidos; Cultura dos tecidos; Early flowering induction; Florescimento; Fusão de protoplastos; Gomose de Phytophthora; Indução de florescimento; Marcadores moleculares; Molecular makers; Molecular markers; Phutophthora root rot; Phytophthora root rot; Tolerance to aluminum toxicity; Tolerance to alumium toxicity; Tolerância à seca; Tolerância ao alumínio; Tristeza dos citrus; Vírus da tristeza dos citros. |
Thesagro: |
Alumínio; Fruta cítrica; Hibridação; Indução; Marcador Molecular; Melhoramento; Poliembrionia; Seca; Vírus. |
Thesaurus Nal: |
breeding; chromosome banding; Citrus; Citrus tristeza virus; drought tolerance; hybridization; polyembryony; protoplast fusion; tissue culture. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/143115/1/Citrus-Breeding-Program-Doc-107-2003.pdf
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Marc: |
LEADER 04574nam a2200757 a 4500 001 1652737 005 2016-05-18 008 2003 bl uuuu u0uu1 u #d 022 $a1516-5728 100 1 $aSOARES FILHO, W. dos S. 245 $aCitrus breeding program at Embrapa Cassava & Fruits$bdevelopment of hybrids. 260 $aCruz das Almas: Embrapa Mandioca e Fruticultura$c2003 300 $a39 p. 490 $a(Embrapa Mandioca e Fruticultura. Documentos, 107). 520 $aIn order to obtain new citrus varieties, better adapted to tropical conditions, the Embrapa - National Cassava & Fruits Research Center (CNPMF), as known as Embrapa Cassava & Fruits, has started in September 1988 a hybridization program based on its own Active Germplasm Bank, which shows a great genetic variability, represented for about 700 accesses, comprising several Citrus species and varieties, besides close relative genera, among which are inclused Poncirus, Fortunella, Microcitrus, Eremocitrus and Severinia, among others of smaller importance, under the point of view of genetic improvement. The program was set up due to the relatively low longevity of the citurs orchards, whose life span is around 15 to 18 years in the main producing areas of São Paulo State, that represents about 75% of the Brazilian production, and from 12 to 15 years in the North and Northeast regions of the country. As immediate objectives, the program aims at selection of genotypes, particularly rootstocks, tolerant to drought conditions and aluminum toxicity, resistant to diseases such as Phytophthora root rot and Citrus Tristeza Virus - CTV, and adapted to high density tree population. A multidisciplinary research group is involved in these studies and several research activities are underway, mainly: a) hybridization, including varieties of high agronomic valoe and/or adaptive potential to grow in abiotic and biotic stresses; b) identification of hybrid embryos and early identification of zygotic seedlings by analysis of foliar morphology, isoenzymes, polymorphic DNA segments and chromosome banding; c) studies concerned to in vitro cultivation of citrus embryos, as well as to the complement of the embryogenesis of zygotic embryos starting from early stages, avoiding or restricting the presence of nucellar embryos, particularly in polyembryonic varieties, used as female parents in artificial hybridizations; d) identification of promising parents regarding to obtaining new hybrid varieties, rootstocks and scions; e) definition of methodologies for early selection of hybrids tolerant to drought and aluminum toxicity, as well as resistant to Phytophthora root rot and CTV; f) establishment of methodologies for early flowering induction, aiming at shortening the pre-reproductive period of selected hybrids; g) development of somatic hybrids by protoplast fusion. 650 $abreeding 650 $achromosome banding 650 $aCitrus 650 $aCitrus tristeza virus 650 $adrought tolerance 650 $ahybridization 650 $apolyembryony 650 $aprotoplast fusion 650 $atissue culture 650 $aAlumínio 650 $aFruta cítrica 650 $aHibridação 650 $aIndução 650 $aMarcador Molecular 650 $aMelhoramento 650 $aPoliembrionia 650 $aSeca 650 $aVírus 653 $aBandeamento cromossômico 653 $aCitros 653 $aCitrus trieza virus 653 $aCultura de tecidos 653 $aCultura dos tecidos 653 $aEarly flowering induction 653 $aFlorescimento 653 $aFusão de protoplastos 653 $aGomose de Phytophthora 653 $aIndução de florescimento 653 $aMarcadores moleculares 653 $aMolecular makers 653 $aMolecular markers 653 $aPhutophthora root rot 653 $aPhytophthora root rot 653 $aTolerance to aluminum toxicity 653 $aTolerance to alumium toxicity 653 $aTolerância à seca 653 $aTolerância ao alumínio 653 $aTristeza dos citrus 653 $aVírus da tristeza dos citros 700 1 $aVILARINHOS, A. D. 700 1 $aALVES, A. A. C. 700 1 $aCUNHA SOBRINHO, A. P. 700 1 $aOLIVEIRA, A. A. R. 700 1 $aSOUZA, A. da S. 700 1 $aLEDO, C. A. da S. 700 1 $aCRUZ, J. L. 700 1 $aSOUZA, L. D. 700 1 $aCASTRO NETO, M. T. de 700 1 $aGUERRA FILHO, M. dos S. 700 1 $aPASSOS, O. S. 700 1 $aMEISSNER FILHO, P. E.
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Embrapa Mandioca e Fruticultura (CNPMF) |
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1. | | SOARES FILHO, W. dos S.; VILARINHOS, A. D.; ALVES, A. A. C.; CUNHA SOBRINHO, A. P.; OLIVEIRA, A. A. R.; SOUZA, A. da S.; LEDO, C. A. da S.; CRUZ, J. L.; SOUZA, L. D.; CASTRO NETO, M. T. de; GUERRA FILHO, M. dos S.; PASSOS, O. S.; MEISSNER FILHO, P. E. Citrus breeding program at Embrapa Cassava & Fruits: development of hybrids. Cruz das Almas: Embrapa Mandioca e Fruticultura, 2003. 39 p. (Embrapa Mandioca e Fruticultura. Documentos, 107).Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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