Microsporogenesis in inbred line of popcorn (Zea mays L)
Genet. mol. res. (Online)
;
6(4): 1013-1018, 2007. ilus, tab
Artigo
em Inglês
| LILACS
| ID: lil-520049
ABSTRACT
Endogamy places genes for several characteristics in homozygosis, which include those related to meiosis causing abnormalities that may impair gamete viability. An original population (S0) of popcorn (CMS-43) produced by Embrapa Maize and Sorghum was self-pollinated for seven years, generating inbred lines (S1 to S7). Conventional studies of microsporogenesis revealed that meiotic abnormalities did not increase with endogamy. Univalent chromosomes, irregular chromosome segregation, abnormal cell shape, partial asynapsis, cell fusion, absence of cytokinesis, abnormal spindle orientation, and chromosome stickiness were recorded in low frequency in meiocytes. Since the frequency of abnormalities was low, mainly in S7, inbred lines from CMS-43 have a high potential for hybridization.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Zea mays
/
Endogamia
/
Meiose
Idioma:
Inglês
Revista:
Genet. mol. res. (Online)
Assunto da revista:
Biologia Molecular
/
Genética
Ano de publicação:
2007
Tipo de documento:
Artigo
/
Documento de projeto
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade Estadual de Maringá/BR
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