Evaluation of microsporogenesis in an interspecific Brachiaria hybrid (Poaceae) collected in distinct years
Genet. mol. res. (Online)
;
7(2): 424-432, 2008. tab, ilus
Artículo
en Inglés
| LILACS
| ID: lil-640996
ABSTRACT
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.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Brachiaria
/
Meiosis
Idioma:
Inglés
Revista:
Genet. mol. res. (Online)
Asunto de la revista:
Biologia Molecular
/
Genética
Año:
2008
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
Embrapa Gado de Corte/BR
/
Universidade Estadual de Maringá/BR
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