Título:	Evaluation of microsporogenesis in an interspecific Brachiaria hybrid (Poaceae) collected in distinct years.
Autoria:	FUZINATO, V. A. PAGLIARINI, M. S. VALLE, C. B. do
Afiliação:	Veridiana Aparecida Fuzinatto, UEM; Maria Suely Pagliarini, UEM; CACILDA BORGES DO VALLE, CNPGC.
Ano de publicação:	2008
Referência:	Genetics and Molecular Research, Ribeirão Preto, v.7, n. 2, p. 424-432, 2008.
Conteúdo:	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.
Thesagro:	Melhoramento genético vegetal Pastagem Citogenética vegetal Meio ambiente Hibrido Planta Forrageira
Palavras-chave:	Microsporogênse Braquiária Campo Grande Mato Grosso do Sul Brasil
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPGC)