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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
14/07/1995 |
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Data da última atualização: |
14/07/1995 |
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Autoria: |
ORTIZ, R.; VULYSTEKE, D. |
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Afiliação: |
International Institute of Tropical Agriculture, Ibadan, Nigeria. |
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Título: |
Inheritance of Black Sigatoka disease resistance in Plantain-banana (Musa spp.) hybrids. |
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Ano de publicação: |
1994 |
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Fonte/Imprenta: |
Theor Aggl Genet, v.89, p.146-152, 1994. |
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Idioma: |
Inglês |
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Conteúdo: |
Black sigatoka (Mycosphaerella fijiensis Morelet), an airborne fungal leaf-spot disease, is a major constraint to plantain and banana (Musa spp.) production wold-wide. Gaining further Knowledge of the genetics of host-plant resistance will enhance the development of resistant cultivars, which is considered to be the most appropriate means to achieve stable production. Genetic analysis was conducted on 101 euploid (2x, 3x and 4x) progenies, obtained from crossing two susceptible tripoid plantin cultivars with the resistant wild diploid banan 'Calcutta 4'. Segregating progenies, and a susceptible reference plantain cultivars, were evaluated over 2 consecutive years. Three distinct levels of host response to black sigatokawere defined as follows: susceptible (<8 leaves without spots), less susceptible (8-10), and partially resistant (>10). Segregation ratios for resistance at the 2x level fitted a genetic model having one major recessive resistant allele (bs) and two independet alleles with additive effects (bsr(2) and bsr(3)). |
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Palavras-Chave: |
2n eggs; Horrizontal durable resistance; Trisomic segregation. |
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Thesagro: |
Mycosphaerella Fijiensis. |
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Thesaurus Nal: |
resistance mechanisms. |
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Categoria do assunto: |
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Marc: |
LEADER 01609naa a2200193 a 4500
001 1646674
005 1995-07-14
008 1994 bl --- 0-- u #d
100 1 $aORTIZ, R.
245 $aInheritance of Black Sigatoka disease resistance in Plantain-banana (Musa spp.) hybrids.
260 $c1994
520 $aBlack sigatoka (Mycosphaerella fijiensis Morelet), an airborne fungal leaf-spot disease, is a major constraint to plantain and banana (Musa spp.) production wold-wide. Gaining further Knowledge of the genetics of host-plant resistance will enhance the development of resistant cultivars, which is considered to be the most appropriate means to achieve stable production. Genetic analysis was conducted on 101 euploid (2x, 3x and 4x) progenies, obtained from crossing two susceptible tripoid plantin cultivars with the resistant wild diploid banan 'Calcutta 4'. Segregating progenies, and a susceptible reference plantain cultivars, were evaluated over 2 consecutive years. Three distinct levels of host response to black sigatokawere defined as follows: susceptible (<8 leaves without spots), less susceptible (8-10), and partially resistant (>10). Segregation ratios for resistance at the 2x level fitted a genetic model having one major recessive resistant allele (bs) and two independet alleles with additive effects (bsr(2) and bsr(3)).
650 $aresistance mechanisms
650 $aMycosphaerella Fijiensis
653 $a2n eggs
653 $aHorrizontal durable resistance
653 $aTrisomic segregation
700 1 $aVULYSTEKE, D.
773 $tTheor Aggl Genet$gv.89, p.146-152, 1994.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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