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Articles by Guilherme Fernando Capristo Silva
Total Records ( 2 ) for Guilherme Fernando Capristo Silva
  Carlos Antonio da Silva Junior , Francisco Eduardo Torres , Paulo Eduardo Teodoro , Guilherme Fernando Capristo Silva and Eduardo Souza Silva
  In Pantanal South Matogrossense croplands pasture are around four million hectares, subject to flooding in the period of the waters. However, water deficit can lead to dehydration in the plant, reducing its growth and acceleration of senescence of tissues by decreasing the rate of leaf expansion and consequently showing less height and photosynthesis by reducing the leaf area. The objective of this research was to study the development of different cultivars of Brachiaria brizantha, which best thrives under two types of environments (conventional pasture and vereda-type of Cerrado vegetation formation) in periods of drought and rain. The experimental design was of randomized blocks with four repetitions in each environment in the two periods. Every 15 DAE (days after emergence) was rated the height of tiller, stem diameter and width of the leaf blade. Was employed Kruskal Wallis statistical method = {P (x>X2); (α = 0.05)} and for comparisons between the means obtained from the variables was carried out the Mann-Whitney test the probability 0.05. To cultivate larger values presented to Xaraés height of plant, stem diameter and width of the leaf blade in relation to the cultivars Marandu, Piatã and MG-4. Cultivating MG-4 presented the lower plant height, stem diameter, width of the leaf blade and a smaller thatched elongation in respect of other cultivars. Cultivating Xaraés was which adapted better to the region of the Cerrado-Pantanal ecotone, showing superior results to the other cultivars.
  Carlos Antonio da Silva Junior , Paulo Eduardo Teodoro , Guilherme Fernando Capristo Silva , Larissa Pereira Ribeiro , Flavia Alves da Silva , Caio Cezar Guedes Correa , Roque Apolinario Alves da Luz Junior and Francisco Eduardo Torres
  Determining the genetic variability and correlations between traits of interest for selection in a population is one of the stages in a breeding program. The objectives of this study was to evaluate the potential for genetic improvement of a population composed of twelve commercial soybean genotypes, were estimated genetic and phenotypic descriptors and correlations between morphological traits of the population. The experimental design was used in randomized block design with four replications. The descriptors measured were plant height and first pod insertion, number of pods and ramifications, mass of hundred grains and yield grains. The yield grains presented more genotypic coefficient of variation, ratio b and herdability. This descriptor obtained phenotypic correlations significant positive (p<0.01), with number of pods, ramifications and mass hundred grains, indicating that the selection of plants with larger number of ramifications entailed, therefore, more productive genotypes. The genotype correlations had the same sign and in most cases superior to their corresponding phenotypic correlations values, indicating that the phenotypic expression is decreased compared to environmental influences. Environmental correlations between descriptors with differences in magnitude and sign, in relation to the respective genotype correlations, revealed that the environment favored one character over another and that the genetic and environmental causes of variation have different physiological mechanisms, defaulting the indirect selection.
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