| Registro completo |
| Provedor de dados: |
Genet. Mol. Biol.
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| País: |
Brazil
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| Título: |
Meiosis in elephant grass (Pennisetum purpureum), pearl millet (Pennisetum glaucum) (Poaceae, Poales) and their interspecific hybrids
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| Autores: |
Techio,Vânia Helena
Davide,Lisete Chamma
Pereira,Antônio Vander
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| Data: |
2006-01-01
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| Ano: |
2006
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| Palavras-chave: |
Meiosis
Pennisetum
Elephant grass
Interspecific hybrids
Pearl millet
Pollen
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| Resumo: |
The cultivated and sexually compatible species Pennisetum purpureum (elephant grass, 2n = 4x = 28) and Pennisetum glaucum (pearl millet, 2n = 2x = 14) can undergo hybridization which favors the amplification of their genetic background and the introgression of favorable alleles into breeding programs. The main problem with interspecific hybrids of these species is infertility due to triploidy (2n = 3x = 21). This study describes meiosis in elephant grass x pearl millet hybrids and their progenitors. Panicles were prepared according to the conventional protocol for meiotic studies and Alexanders stain was used for assessing pollen viability. Pearl millet accessions presented regular meiosis with seven bivalents and high pollen viability. For elephant grass, 14 bivalents in diakinesis and metaphase I were observed. The BAG 63 elephant grass accession, derived from tissue culture, presented a high frequency of meiotic abnormalities. The three hybrid accessions presented a high frequency of abnormalities characterized by irregular chromosomal segregation which resulted in the formation of sterile pollen.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000200025
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| Editor: |
Sociedade Brasileira de Genética
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| Relação: |
10.1590/S1415-47572006000200025
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| Formato: |
text/html
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| Fonte: |
Genetics and Molecular Biology v.29 n.2 2006
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| Direitos: |
info:eu-repo/semantics/openAccess
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