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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: |
20/04/2023 |
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Autoria: |
ORTIZ, R.; VUYLSTEKE, D. |
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Afiliação: |
International Institute of Tropical Agriculture(IITA). |
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Título: |
Factors influencing seed set in triploid Musa spp. L. and production of euploid hybrids. |
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Ano de publicação: |
1995 |
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Fonte/Imprenta: |
Annals of Botany, v.75, n.2, p.151-155, 1995. |
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Idioma: |
Inglês |
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Conteúdo: |
Seed set in triploid Musa spp. L. is very low due to high levels of sterility. This makes cross breeding of plantain and banana difficult. Nonetheless, several triploid plantain and banana cultivars produce seeds after hand pollination with diploid parents. This paper reports results about the pattern of seed vatiation, success of in vitro germination and hybrid production after triploid-diploid crosses. Between-and within-clones differences in seed set were observed. ABB cooking bananas had the highest rates of seed production followed by AAB French plantains. Plantains produced more diploid than tetraploid offsprings after triploid-diploid crosses, which suggests thet meiosis resulted in the production of balanced haploid gametes(n=x) due to normal chromosome behaviour between homologous genomes. Seed set variation within clones was influenced by both the production of 2n(=3x) gametes in the triploid parent and climatic factors. Indeed, seed production, embryo and seed germination success, and euploid and tetraploid hybrid production followed a pattern of seasonal variation reaching a peak in September. High frequency of seed with tetraploid embryos was obtaind in the period from January to mid-March. The results demonstrate that production of desirable tetraploid would be more efficient when hand pollinations are done under high temperature, high solar radiation and low relative humidity. These seem to be the most convenient conditions for relatively high production of 2n eggs as compared to haploid gametes. MenosSeed set in triploid Musa spp. L. is very low due to high levels of sterility. This makes cross breeding of plantain and banana difficult. Nonetheless, several triploid plantain and banana cultivars produce seeds after hand pollination with diploid parents. This paper reports results about the pattern of seed vatiation, success of in vitro germination and hybrid production after triploid-diploid crosses. Between-and within-clones differences in seed set were observed. ABB cooking bananas had the highest rates of seed production followed by AAB French plantains. Plantains produced more diploid than tetraploid offsprings after triploid-diploid crosses, which suggests thet meiosis resulted in the production of balanced haploid gametes(n=x) due to normal chromosome behaviour between homologous genomes. Seed set variation within clones was influenced by both the production of 2n(=3x) gametes in the triploid parent and climatic factors. Indeed, seed production, embryo and seed germination success, and euploid and tetraploid hybrid production followed a pattern of seasonal variation reaching a peak in September. High frequency of seed with tetraploid embryos was obtaind in the period from January to mid-March. The results demonstrate that production of desirable tetraploid would be more efficient when hand pollinations are done under high temperature, high solar radiation and low relative humidity. These seem to be the most convenient conditions for relatively high production of 2n... Mostrar Tudo |
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Palavras-Chave: |
2n gametes; AAA group; AAB group; ABB group; Fertility; Musa spp. |
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Thesagro: |
Banana. |
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Thesaurus Nal: |
embryo culture; seed set. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02177naa a2200241 a 4500
001 1646670
005 2023-04-20
008 1995 bl uuuu u00u1 u #d
100 1 $aORTIZ, R.
245 $aFactors influencing seed set in triploid Musa spp. L. and production of euploid hybrids.$h[electronic resource]
260 $c1995
520 $aSeed set in triploid Musa spp. L. is very low due to high levels of sterility. This makes cross breeding of plantain and banana difficult. Nonetheless, several triploid plantain and banana cultivars produce seeds after hand pollination with diploid parents. This paper reports results about the pattern of seed vatiation, success of in vitro germination and hybrid production after triploid-diploid crosses. Between-and within-clones differences in seed set were observed. ABB cooking bananas had the highest rates of seed production followed by AAB French plantains. Plantains produced more diploid than tetraploid offsprings after triploid-diploid crosses, which suggests thet meiosis resulted in the production of balanced haploid gametes(n=x) due to normal chromosome behaviour between homologous genomes. Seed set variation within clones was influenced by both the production of 2n(=3x) gametes in the triploid parent and climatic factors. Indeed, seed production, embryo and seed germination success, and euploid and tetraploid hybrid production followed a pattern of seasonal variation reaching a peak in September. High frequency of seed with tetraploid embryos was obtaind in the period from January to mid-March. The results demonstrate that production of desirable tetraploid would be more efficient when hand pollinations are done under high temperature, high solar radiation and low relative humidity. These seem to be the most convenient conditions for relatively high production of 2n eggs as compared to haploid gametes.
650 $aembryo culture
650 $aseed set
650 $aBanana
653 $a2n gametes
653 $aAAA group
653 $aAAB group
653 $aABB group
653 $aFertility
653 $aMusa spp
700 1 $aVUYLSTEKE, D.
773 $tAnnals of Botany$gv.75, n.2, p.151-155, 1995.
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| 1. |  | BASTIANEL, M.; NICOLINI, F.; RODRIGUES, V.; MEDINA, C.; SEGATTI, N.; FREITAS-ÁTUA, J.; NOVELLI, V. M.; MACHADO, M. A. Incidência de leprose em variedades de tangerinas e híbridos. Fitopatologia Brasileira, Brasília, DF, v. 32, p. 293, ago. 2007. Suplemento. Edição dos Resumos do XL Congresso Brasiliero de Fitopatologia, Maringá, ago. 2007.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
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