Data/hora: 20/06/2024 17:18:41

Biblioteca(s): | Embrapa Milho e Sorgo.
Data corrente: | 27/10/2008
Data da última atualização: | 24/05/2018
Autoria: | PEREIRA, L. K.; SCAPIM, C. A.; MANGOLIN, C. A.; MACHADO, M. de F. P. da S.; PACHECO, C. A. P.; MORA, F.
Afiliação: | lLiz Kazmirczak Pereira, Universidade Estadual de Maringá; Crlos Alberto Scapim, Universidade Estadual de Maringá; Claudete Aparecida Mangolin, Universidade Estadual de Maringá; Maria de Fátima Pires da Silva Machado, Universidade Estadual de Maringá; CLESO ANTONIO PATTO PACHECO, CNPMS; Freddy Mora, Universidade Estadual de Maringá.
Título: | Heterozygosity following half-sib recurrent selection in popcorn using isoenzyme markers.
Ano de publicação: | 2008
Fonte/Imprenta: | Electronic Journal of Biotechnology, v. 11, n. 1, p. 107-115 , 2008.
DOI: | 10.2225/vol11-issue1-fulltext-2
Idioma: | Inglês
Conteúdo: | lsozyme biochemical marker may be useful tool for genomic analysis of maize populations undergoing recurrent selection. Thus, isozymes markers was utillzed for assess tbe changes in tbe genetic variability and distance in a BraziUan composite population of popcorn following four cyeles of recurrent selection for yield. Qne hundred and ninety-six half-sib families were evaluated from each cyele and tbe ten highest-yielding families (5.2%) were recombined to produce the next cyele. lsozyme analysis considered 80 seedlings per cyele. Simple linear regression equations were estimated among tbe allele frequencies in each locus in function of tbe selection cyeles, the genetic distances among the cyeles and tbe average heterozygosity per locus for each cyele. Regression analysis did not reveal any common trend for changes in aUele frequencies presumably due to selection. The estimates of tbe number of polymorphic locus, of tbe mean of aUele per locus and tbe mean heterozygosity did not reveal any reduction in variability. lt was concluded tbat four selection cyeles did not cause relevant changes in tbe variability or genetic distance among the selection cyeles of CMS-43 popcorn population. lsozymes markers analysis showed that tbe number of recombined half-sib families in recurrent selection was suitable.
Palavras-Chave: | Allozymes frequency; Milho de pipoca; Selection cycles.
Thesagro: | Zea mays.
Thesaurus Nal: | genetic distance.
Categoria do assunto: | --
Registro original: | Embrapa Milho e Sorgo (CNPMS)
Exemplares: | CNPMS - (20973-1) - UPC - AP - DD -  -  -  - DIS