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Provedor de dados:  Repositório Alice
País:  Brazil
Título:  Evaluation of microsporogenesis in an interspecific Brachiaria hybrid (Poaceae) collected in distinct years.
Autores:  FUZINATO, V. A.
PAGLIARINI, M. S.
VALLE, C. B. do.
Data:  2009-04-20
Ano:  2008
Palavras-chave:  Pastagem
Melhoramento genético vegetal
Citogenética vegetal
Microsporogênse
Meio ambiente
Planta Forrageira
Gramínea forrageira
Braquiária
Híbrido
Campo Grande
Mato Grosso do Sul
Brasil
Resumo:  Microsporogenesis in an interspecific Brachiaria hybrid, grown in the field under natural environmental conditions in Brazilian savannas, was analyzed in three distinct years of collection. Several types of meiotic abnormalities were recorded during those three years, but varied in type and frequency depending on the year. The average temperature and rainfall 15 days before collection was unusually high in those years. The percentage of abnormal meiocytes recorded was 62% in 2001, 73% in 2004, and 77% in 2005. The abnormalities observed during microsporogenesis compromised pollen viability by generating unbalanced gametes or affecting nucleolus organization. The environmental conditions under which the hybrid was growing could have affected the genetic control of meiosis. More detailed studies, under controlled conditions, are necessary to better understand the effects of environmental factors on Brachiaria microsporogenesis hybrids.

2008
Tipo:  Artigo em periódico indexado (ALICE)
Idioma:  Inglês
Identificador:  12389

http://www.alice.cnptia.embrapa.br/handle/doc/326850

http://ainfo.cnptia.embrapa.br/digital/bitstream/item/42707/1/gmr430.pdf
Editor:  Genetics and Molecular Research, Ribeirão Preto, v.7, n. 2, p. 424-432, 2008.
Relação:  Embrapa Gado de Corte - Artigo em periódico indexado (ALICE)
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