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Análise genética no melhoramento da macaúba

quinta-feira, junho 13, 2019


Author: MANFIO, Candida Elisa

Abstract: The aim of this work was to identify the genetic variability of some characters phenotypic, genetic diversity and estimate the number of measurements necessary (fruit) for evaluation of matrices plants of macaw palm. The work was developed by the Department of Plant Science of Universidade Federal de Viçosa (Federal University of Viçosa, Brazil), analyzing the fruits of 145 matrices plant in six Brazil states, Minas Gerais, São Paulo, Maranhão, Pará, Pernambuco and Mato Grosso do Sul and juvenile plants of 51 progeniesfrom Minas Gerais and São Paulo states. 

The results showed that there was genetic variability among 145 macaw palm matrices plant with high variation for most traits. The traits that had most contributed to the study of genetic diversity were the thickness of the endocarp, the fruit diameter, the kernel volume, the fruit weight for 145 plant matrices of six states studied. Studying separately the 91 matrices plant of Minas Gerais states the traits that had most contributed were the fruit volume, the kernel volume, and fruit diameter. The clustering methods of Tocher and UPGMA grouped the 145 matrices plants in nine and 10 groups. 

When analyzed only de 91 matrices plans of Minas Gerais states, these same methods grouped the matrices plants in 17 and eight groups. The composition of each group varied according methods studied. Selecting the 145 matrices plant by method of “ranks” adapted from Mulamba and Mock (1978) the 30 matrices plant were selected were: 81, 34, 42, 75, 10, 14, 22, 82, 24, 9, 65, 33, 15, 45, 78, 7, 6, 11, 13, 19, 64, 32, 67, 25, 29, 50, 16, 66, 74 and 76. The same matrices plants were selected when analyzed only the 91 matrices plants of Minas Gerais states. Studying the estimative of repeatability coefficients the results showed that four fruits are sufficient to analyzed matrices plant of macaw palm with determination coefficient of 90%. Studying 51 progenies of macaw palm from Minas Gerais and São Paulo states the results showed existence of genetic variability. 

The clustering methods of Tocher and UPGMA grouped the 51 progenies in seven and four groups, respectively. The 25 progeies selected by the method of "ranks," adapted from Mulamba and Mock (1978) were: 20, 16, 36, 9, 31, 26, 29, 12, 5, 39, 14, 21, 28, 3, 25, 4, 10, 34, 22, 48, 51, 6, 35 and 38.

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Page: Locus UFV

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