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- W2525485401 abstract "ABSTRACT - The characterization of 26 populations with varying levels of exotic germplasm was conducted in two environments representing distinct locations and planting seasons. The whole set was identified by five subsets: I ≡ local adapted germplasm; II ≡ exotic derived from tropical germplasm; III ≡ semi-exotic derived from tropical germplasm; IV ≡ semi-exotic derived from varying proportion of tropical and temperate germplasm; and V ≡ semi-exotic derived from temperate germplasm. In the experiment eI (Anhembi, SP; three replications) the mean yield (EW - ear weight, t ha-1) for the five sets were 9.49, 8.88, 9.11, 8.68 and 8.51; which are equivalent to 79.5, 74.4, 76.3, 72.7 and 71.3 in percent of the hybrid check. Means for other traits (E10 – weight of ten ears, EL – ear length, ED – ear diameter, and TB – tassel branch number) were also shown. In the experiment eII (Piracicaba, SP; no replications), the following traits were evaluated: EW, GW (grain weight), GR (grain yield ratio), MF (days to male flowering), and SW (specific weight). A low correlation (0.220) was observed for EW between environments. In general, the populations under study presented a fairly good potential to be used in breeding programs. Key words: exotic germplasm, population improvement, Zea mays. SOBRELEVACAO DO VALOR GENETICO DE GERMOPLASMA SEMIEXOTICO DE MILHO RESUMO - A caracterizacao de 26 populacoes com varios niveis de germoplasma exotico foi conduzida em dois ambientes, representando locais e epocas de plantio distintas. O conjunto total foi identificado por cinco subconjun-tos: I ≡ germoplasma local adaptado; II ≡ exotico derivado de germoplasma tropical; III ≡ semiexotico derivado de germoplasma tropical; IV ≡ semiexotico derivado de variadas proporcoes de germoplasma tropical e temperado; e V ≡ semiexotico derivado de germoplasma temperado. No experimento eI (Anhembi, SP; tres repeticoes), as medias de producao (EW – peso de espigas, t ha-1) para os cinco subconjuntos foram 9,49, 8,88, 9,11, 8,68 e 8,51, que sao equivalentes a 79,5%, 74,4%, 76,3%, 72,7% e 71,3% da media da testemunha. As medias de outros caracteres (E10 – peso de 10 espigas, EL – comprimento da espiga, ED – diâmetro da espiga e TB – numero de ramificacoes do pendao) tambem foram apresentadas. No experimento eII (Piracicaba, SP; sem repeticao), foram avaliados os caracteres: EW; GW (peso de graos); GR (rendimento de graos); MF (dias para florescimento masculino); e SW (peso especifico). Uma baixa correlacao (0.220) foi observada para EW entre ambientes. As populacoes avaliadas apresentam bom potencial para serem usadas em programas de melhoramento. Palavras chave: germoplasma exotico, melhoramento de populacoes, Zea mays." @default.
- W2525485401 created "2016-10-07" @default.
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- W2525485401 date "2016-08-30" @default.
- W2525485401 modified "2023-10-18" @default.
- W2525485401 title "Genetic Enhancement of Semi-Exotic Maize Germplasm" @default.
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- W2525485401 doi "https://doi.org/10.18512/1980-6477/rbms.v15n2p346-356" @default.
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