Microsporogenesis in inbred line of popcorn (Zea mays L.)

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 inbre...

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Published inGenetics and molecular research Vol. 6; no. 4; pp. 1013 - 1018
Main Authors Ricci, G C L, Silva, N, Pagliarini, M S, Scapim, C A
Format Journal Article
LanguageEnglish
Published Brazil 01.01.2007
Subjects
Chromosomes, Plant - genetics
Cytokinesis - genetics
Gametogenesis - genetics
Inbreeding
Meiosis - genetics
Sorghum
Zea mays
Zea mays - cytology
Zea mays - genetics
Zea mays - growth & development
Zea mays - physiology
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Summary: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.
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ISSN:1676-5680
1676-5680