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| Martuscello,Janaina Azevedo; Braz,Thiago Gomes dos Santos; Jank,Liana; Cunha,Daniel de Noronha Figueiredo Vieira da; Fonseca,Dilermando Miranda da. |
| The objective of this experiment was to evaluate the genetic divergence between hybrids obtained from 10 sexual genitors of the Panicum maximum breeding program at Embrapa Beef Cattle. For this, the following morphological descriptors were used: plant height, growth habit, leaf aspect, leaf waxiness, hair density on the sheath (DePB) and blade (DePL), degree of hardiness of the hairs on the leaf sheath (DuPB) and blade (DuPL) and length of hairs on the sheath and blade. The characteristics growth habit and waxiness were not included in the analysis for being invariant. The phenotypic correlations were low and, therefore, not used to eliminate variables. By the principal component analysis, an 84.3% accumulation of the variation was observed until the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Discriminating analysis; Optimization method; Principal components; Relative importance of the characteristics; Tocher. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000900002 |
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| Arnhold, Emmanuel; Universidade Federal do Maranhão; Silva, Ricardo Gonçalves; Universidade Federal do Maranhão; Viana, José Marcelo Soriano; Universidade Federal de Viçosa (UFV). |
| O objetivo deste trabalho foi selecionar famílias S5 de milho-pipoca com base na divergência genética e no desempenho per se. Foram avaliadas 144 famílias S5, obtidas da população Beija-flor. O experimento foi instalado em Viçosa, na safra 2002/2003, no delineamento em blocos aumentados, com as testemunhas IAC 112 e Zélia, intercaladas a cada dez famílias. A divergência genética foi predita pelo método de otimização de Tocher, utilizando a distância generalizada de Mahalanobis. Foram formados 23 grupos. Dentro de cada grupo, estipularam-se pontos de corte para índice de prolificidade (≥ 1), peso de 100 grãos (≤ 15 g) e rendimento de grãos (≥ 1.000 kg ha-1). As famílias restantes dentro de cada grupo foram selecionadas em capacidade de... |
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Palavras-chave: Ciências agrárias agronomia; Produção vegetal genética e melhoramento melhoramento vegetal genética quantitativa análise multivariada biometria Zea mays; Tocher; Mahalanobis; Agrupamento 5.01.03.05-9 - Melhoramento Vegetal Zea mays; Tocher; Mahalanobis; Grouping. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3886 |
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| Silva,Danilo Fernando Guimarães; Coelho,Caroline de Jesus; Romanek,Cristiane; Gardingo,José Raulindo; Silva,Anderson Rodrigo da; Graczyki,Brenda Luiza; Oliveira,Eduardo Augusto Teixeira; Matiello,Rodrigo Rodrigues. |
| ABSTRACT The present study aimed to estimate the genetic divergence among corn half-sib progenies seeking to direct recombination between contrasting and superior progenies for green corn production. Ninety-six progenies were evaluated in a randomized block design with 3 replications, and 18 characteristics associated with agronomic adaptation and green corn yield were measured. The genetic divergence was estimated using generalized square Mahalanobis distance and the progenies grouped by UPGMA and Tocher’s methods. The joint analysis of variance showed genetic variability among the progenies for the characteristics evaluated. The UPGMA method was more sensitive than Tocher’s, since it led to the formation of 11 groups genetically dissimilar compared to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Ears yield; Potential; UPGMA; Tocher. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000400401 |
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