seleção genética em progênies híbridas de coqueiro genetic selection in hybrid progenies of coconut palm

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ID: 243803
2009
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Abstract
O presente trabalho objetivou realizar a seleção genética de indivíduos híbridos superiores de coqueiro a partir da avaliação de 1.080 plantas para produção de frutos e de albúmen fresco, visando a ao fornecimento de sementes e/ou clones melhorados para plantio no Pará. Empregaram-se o delineamento experimental de blocos ao acaso e os métodos Blupis e Blupis-Biefeitos, visando identificar em quais parcelas estão os melhores indivíduos e quantos indivíduos devem ser selecionados de cada parcela. Foram avaliados os caracteres número de frutos (NF), peso de albúmen fresco por fruto (PAFF) e peso de albúmen fresco por planta (PAFP), em nove safras anuais. As estimativas dos coeficientes de determinação genética entre médias de progênies variaram de 81,12% a 97,38%, propiciando acurácias seletivas de 90,07% a 98,68% para a seleção entre famílias híbridas. A interação famílias x safras foi de grande magnitude para os caracteres NF e PAFP, conforme revelado pelas baixas (40,77% a 63,36%) correlações genotípicas através das safras. O procedimento Blupis - Biefeitos indicou a seleção de 66 plantas, sendo 48 da família PB113 e 18 da família PB111, propiciando intensidade de seleção de 6,1% e ganho genético de 9,95%.
The present study aimed the genetic selection of superior hybrid individuals of coconut palm from the evaluation of 1080 plants for the production of fruits and fresh albumen, aiming the supply of improved seeds and/or clones for plantation in Pará. The experimental design was randomized blocks and the methods Blupis and Blupis-Biefeitos were used to identify in which plots were the best individuals and how many individuals had to be selected in each plot. The characters evaluated were: number of fruits (NF), weight of fresh albumen per fruit (WFAF) and weight of fresh albumen for plant (WAFP), in nine annual harvests. The estimates of the coefficients of genetic determination between averages of progenies varied from 81.12% to 97.38%, promoting a selective accuracy from 90.07% to 98.68% for the selection among hybrid families. The interaction families x harvests was of great magnitude for the characters NF and WFAF, as revealed by the low (40.77% 63.36%) genotypic correlations throughout the harvests. The Blupis -Biefeitos procedure indicated the selection of 66 plants, being 48 from the PB113 family and 18 from the PB111 family, propitiating a selection intensity of 6.1% and a genetic gain of 9.95%.
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Authors João Tomé Farias Neto, Paulo Manoel Pontes Lins, Marcos Deon Vilela de Resende, Antônio Agostinho Muller
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Journal technocom
Year 2009
DOI
10.1590/S0100-29452009000100026
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452009000100026
Keywords
selection blup/reml

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