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Type: Artigo de periódico
Title: Genic and genotypic frequencies of endosperm mutants in maize populations under natural selection
Author: Martins, MEQP
da Silva, WJ
Abstract: The genic and genotypic frequencies of four maize endosperm mutants, opaque 2 (o2), shrunken 2 (sh2), sugary(su), and waxy(wx), which alter protein, sugar, soluble polysaccharides, and starchy fractions, respectively, were monitored throughout five successive generations in synthetic populations of the same genetic background under natural selection. The effect of selection was studied in the vegetative and reproductive phases through the comparison of the recessive homozygous frequencies in the seeds and in the adult plants. Data showed that natural selection acted diversely, in direction and intensity, on the mutants and in the phases of the plant life cycle. The genic frequencies indicated the occurrence of stabilizing selection over o2 and wx, and directional selection against sh2 and su.
Country: EUA
Editor: Oxford Univ Press Inc
Citation: Journal Of Heredity. Oxford Univ Press Inc, v. 89, n. 6, n. 516, n. 524, 1998.
Rights: fechado
Identifier DOI: 10.1093/jhered/89.6.516
Date Issue: 1998
Appears in Collections:Unicamp - Artigos e Outros Documentos

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