Comparison of methods for selection of parents and segregating populations applied to wheat breeding [Comparação de métodos de seleção de genitores e populações segregantes aplicados ao melhoramento de trigo]
Pimentel A.J.B.,Federal University of Vicosa |
Ribeiro G.,Federal University of Pampa |
de Souza M.A.,Federal University of Vicosa |
Moura L.M.,Federal University of Vicosa |
And 2 more authors.
Bragantia | Year: 2013
The methods used for selecting crosses in one crop species are not necessarily appropriate for others. The present study aimed to evaluate the application of diallel analysis, genetic diversity, parental average, and the Jinks and Pooni method for the selection of parents and superior segregating populations for the grain yield character in wheat. Thus, two experiments were conducted and the treatments were arranged in lattice (experiment I) and randomized blocks with individual information within the plot (experiment II). Twelve parental individuals and 36 segregating populations in the F3 generation resulting from the crossing of these parents in a partial diallel arrangement were evaluated. The application of the evaluated methodologies led to distinct results. The parental average and genetic diversity alone are not efficient prediction methods. The methodology of Jinks and Pooni presents practical limitation because it is not adequate for wheat crop system. Among the evaluated methodologies, diallel analysis is the most promising method for the identification of parents and superior segregating populations.
Londe V.,Federal University of Ouro Preto |
da Silva J.C.,Centro Universitario Do Planalto Of Araxa
Acta Botanica Brasilica | Year: 2014
Despite their extreme importance for environmental balance, riparian forests have been severely disturbed over time. This study aimed to identify grass species and determine their distribution in a disturbed stretch of riparian forest along Pimentas creek, in the municipality of Matutina, which is in the state of Minas Gerais, Brazil. Among four plots established within the study area, we recorded Pennisetum purpureum Schumach., Urochloa mutica (Forssk.) T.Q. Nguyen, Urochloa decumbens (Stapf) R.D. Webster, Paspalum notatum Flüggé and Andropogon bicornis L. The most common species was Pennisetum purpureum, which occurred in all of the plots, more frequently in those that had been disturbed. The proportions of exotic and native grasses, as well as their distribution, differed significantly among the plots. The distribution of the grass species varied according to the level of degradation of the creek bank, occurring more frequently where the bank had been disturbed. Therefore, we assume that grasses can be used as indicators of degradation in riparian zones. We also found that grasses are less efficient in preventing erosion than is the typical riparian vegetation.
Juliano R.C.,Federal University of Uberlandia |
Juliano R.C.,Centro Universitario Do Planalto Of Araxa |
Travencolo B.A.N.,Federal University of Uberlandia |
Soares M.S.,Federal University of Uberlandia |
Maia M.D.A.,Federal University of Uberlandia
Proceedings of the International Conference on Software Engineering and Knowledge Engineering, SEKE | Year: 2013
Use cases are widely used in early software development phases such as requirements analysis. In this paper, we investigate how use case similarity can impact the classes that implement them. We studied whether the similarity of use cases can have impact on the lines of code shared between them and on metrics of classes that implement them, such as coupling, cohesion and method complexity. We have also successfully applied an automated approach to assess the similarity of use case names.We found that there is a statistically significant correlation, although not strong, between use case similarity and sharing of lines of code. Interestingly, we have also found that classes that are shared between different use cases tend to have lower cohesion. Moreover, classes that are shared between similar use cases tend to have higher method complexity in classes. We found no relation between use case similarity and coupling. Copyright © 2013 by Knowledge Systems Institute Graduate School.
Occurrence of external morphological abnormalities in marine crabs (Decapoda, Brachyura) from North Coast of the São Paulo State [Ocorrência de anormalidades morfológicas externas em caranguejos marinhos (Decapoda, Brachyura) no litoral norte do estado de são paulo]
Fransozo A.,Sao Paulo State University |
Teixeira G.M.,Federal University of Mato Grosso do Sul |
Gomes R.R.,Sao Paulo State University |
Silva J.C.,Centro Universitario Do Planalto Of Araxa |
Bolla Jr. E.A.,Sao Paulo State University
Acta Scientiarum - Biological Sciences | Year: 2012
Deformities and abnormalities in crustaceans have been associated to genetic problem, which occurred during molt process, damage caused by ectobionts, predators or environmental stress caused by chemical wastes. Some crab specimens collected in the São Paulo littoral were found having body abnormalities. They belong to the following crab species: Callinectes ornatus (Ordway, 1863), Arenaeus cribrarius (Lamarck, 1818) and Leurocyclus tuberculosus (H. Milne Edwards; Lucas, 1843). Samplings were performed by trawling during July 2008, August and October 2009 at the Ubatuba region, São Paulo State, Brazil. Body abnormalities were verified in the cheliped dactyl (C. ornatus an adult male), carapace deformities (A. cribrarius an adult male) and abdominal alterations (C. ornatus an adult female; L. tuberculosus an adult male and an ovigerous female). The record and analysis of such occurrences can help in the distinction of natural or human impact caused alterations. In this way, the occurrence study of this kind of body alterations could provide tools in order to control unprotected environmental areas, as well as bring subsides to understand the unusual variations during the ontogeny of important species in the benthic community.
Santana H.A.P.,Catholic University of Brasilia |
Santana H.A.P.,Centro Universitario Do Planalto Of Araxa |
Moreira S.R.,Federal University of Vale do Sao Francisco |
Neto W.B.,Catholic University of Brasilia |
And 10 more authors.
BMC Cardiovascular Disorders | Year: 2011
Background: The absence of the I allele of the angiotensin converting enzyme (ACE) gene has been associated with higher levels of circulating ACE, lower nitric oxide (NO) release and hypertension. The purposes of this study were to analyze the post-exercise salivary nitrite (NO 2 -) and blood pressure (BP) responses to different exercise intensities in elderly women divided according to their ACE genotype.Methods: Participants (n = 30; II/ID = 20 and DD = 10) underwent three experimental sessions: incremental test - IT (15 watts workload increase/3 min) until exhaustion; 20 min exercise 90% anaerobic threshold (90% AT); and 20 min control session without exercise. Volunteers had their BP and NO 2 -measured before and after experimental sessions.Results: Despite both intensities showed protective effect on preventing the increase of BP during post-exercise recovery compared to control, post-exercise hypotension and increased NO 2 -release was observed only for carriers of the I allele (p < 0.05).Conclusion: Genotypes of the ACE gene may exert a role in post-exercise NO release and BP response. © 2011 Santana et al; licensee BioMed Central Ltd.