Caracterização da equideocultura no estado de Minas Gerais / Characterization of equidae breeding in Minas Gerais state

Recently, horse breeding has achieved greater prominence in the Brazilian society and now it started to appear as a part of the Brazilian agribusiness. The state of Minas Gerais stands out as the main producer of equidae in Brazil. The aim of this work was to characterize the breeding of equidae in this State in order to support future researches in this sector. By the evaluation of records from 1990 to 2009 provided by the "Brazilian Institute of Geography and Statistics" (IBGE) and also 967 interviews with breeders of equidae, it was possible to characterize some important points. It was observed that equidae breeding in this State moves over R$1,500,000,000 per year and employs 86,000 people. The main investments of the properties are made in purchasing saddles, accessories and commercial feeds. The main goal of equidae breeders in Minas Gerais has been the work in rural properties (49.49%) complementing many farming activities, especially the work with cows. Although Minas Gerais holds the main herd of equidae in the country, the number of animals has decreased. On the one hand, the equidae breeding sector has demonstrated its social and economic importance in agribusiness; on the other, hand further researches are needed to develop public policies to improve the breeding of equidae in Minas Gerais.(AU)

Caracterização da equideocultura no estado de Minas Gerais / Characterization of equidae breeding in Minas Gerais state

Recently, horse breeding has achieved greater prominence in the Brazilian society and now it started to appear as a part of the Brazilian agribusiness. The state of Minas Gerais stands out as the main producer of equidae in Brazil. The aim of this work was to characterize the breeding of equidae in this State in order to support future researches in this sector. By the evaluation of records from 1990 to 2009 provided by the "Brazilian Institute of Geography and Statistics" (IBGE) and also 967 interviews with breeders of equidae, it was possible to characterize some important points. It was observed that equidae breeding in this State moves over R$1,500,000,000 per year and employs 86,000 people. The main investments of the properties are made in purchasing saddles, accessories and commercial feeds. The main goal of equidae breeders in Minas Gerais has been the work in rural properties (49.49%) complementing many farming activities, especially the work with cows. Although Minas Gerais holds the main herd of equidae in the country, the number of animals has decreased. On the one hand, the equidae breeding sector has demonstrated its social and economic importance in agribusiness; on the other, hand further researches are needed to develop public policies to improve the breeding of equidae in Minas Gerais.

Comparação entre as medidas morfométricas de equinos Mangalarga Marchador de marcha batida e marcha picada / Comparison between the morphometric measures of Mangalarga Marchador horses of batida marcha and picada marcha

The present study aimed to compare the morphometric measurements of Mangalarga Marchador horses of batida and picada marcha. Twenty-two linear and eight angular measurements of 222 males (130 of batida marcha and 92 of picada marcha) and 266 females (168 of batida marcha and 98 picada marcha) were compared in a completely randomized design, consisting of two treatments: horses of batida and picada marcha. The results were submitted to analysis of variance and means were compared by Fisher test (P<0.05). It was concluded that most of the measures of Mangalarga Marchador horses of batida and picada marcha have similar values, however, there are differences between some angles of members.(AU)

Comparação entre as medidas morfométricas de equinos Mangalarga Marchador de marcha batida e marcha picada / Comparison between the morphometric measures of Mangalarga Marchador horses of batida marcha and picada marcha

The present study aimed to compare the morphometric measurements of Mangalarga Marchador horses of batida and picada marcha. Twenty-two linear and eight angular measurements of 222 males (130 of batida marcha and 92 of picada marcha) and 266 females (168 of batida marcha and 98 picada marcha) were compared in a completely randomized design, consisting of two treatments: horses of batida and picada marcha. The results were submitted to analysis of variance and means were compared by Fisher test (P<0.05). It was concluded that most of the measures of Mangalarga Marchador horses of batida and picada marcha have similar values, however, there are differences between some angles of members...

Influence of genetic type and level of concentrate in the finishing diet on carcass and meat quality traits in beef heifers.

Carcass and meat quality traits of thirty-six feedlot beef heifers from different genetic groups (GG) fed at two concentrate levels (CL) were evaluated using 12 - Nellore (NE), 12 - ½Angus x ½Nellore (AN) and 12 - ½Simmental x ½Nellore (SN) animals. Six heifers of each GG were randomly assigned into one of two treatments: concentrate at 0.8% or 1.2% of body weight (BW). Heifers fed concentrate at 0.8% of BW had greater (P<0.05) dressing percentage. None of the proximate analysis components of the beef were affected (P>0.05) by either CL or GG. Heifers from the AN group had higher (P<0.05) carcass weights, 12th rib fat thickness and lower dressing percentage (P<0.05) compared to the other groups. NE heifers had greater WBSF values (P<0.05) than the other genetic groups. Data suggest that the concentrate level can be reduced without compromising meat quality traits.

Expression and suppression of resistance to greenbug (Homoptera: Aphididae) in synthetic hexaploid wheats derived from Triticum dicoccum x Aegilops tauschii crosses.

Fifty-eight synthetic hexaploid wheats, developed by crossing Triticum dicoccum Schrank. and Aegilops tauschii (Coss.) Schmal., were evaluated at the seedling stage, together with their parents, for resistance to greenbug (Schizaphis graminum Rondani) under greenhouse conditions. Seedlings of different synthetic hexaploids showed large phenotypic differences for resistance. All the T. dicoccum parents were susceptible, while high levels of resistance were observed in some of the Ae. tauschii parents. Of the synthetic hexaploids derived from resistant Ae. tauschii parents, a high proportion (76%) showed levels of resistance to the greenbug biotype used that were comparable to those of the resistant parent. While there were clear indications of the presence of suppressor genes for greenbug resistance in the A and/or B genomes of T. dicoccum in some synthetics, positive epistatic interaction was also found in synthetic hexaploids with higher levels of resistance than that of either parent. Resistance from different Ae. tauschii accessions was expressed differently when crossed with the same T. dicoccum, indicating diversity among the resistance genes present in the test synthetic hexaploid wheats. Based on resistance reactions, the genes conferring greenbug resistance in these synthetic hexaploids are probably different from resistance genes previously transferred to wheat from Ae. tauschii.

[Late potentials analysis in patients with malignant ventricular arrhythmia]. / Análise de potenciais tardios em pacientes com arritmias ventriculares malignas.

PURPOSE: To assess the relationship between late potentials and spontaneous ventricular arrhythmias, organic heart disease, inducibility of arrhythmias at electrophysiological study and ejection fraction. METHODS: The population is comprised by 52 patients (41 men, 11 women with mean age 50 +/- 16 years) with spontaneous clinically documented ventricular tachycardia or ventricular fibrillation. An electrophysiological study was performed with conventional programmed stimulation. Within a week of the test a study of late potentials was also performed. RESULTS: Late potentials were documented in 73% of the patients with ventricular tachycardia and only in 17% of the patients with ventricular fibrillation. Sixty-eight percent of the patients with ischemic cardiopathy presented late potentials and in these, ventricular tachycardia was inducible in 93%. Only one from a group of 7 patients with ventricular arrhythmias and no organic heart disease, presented late potentials. In patients with late potentials, 84% have inducible ventricular tachycardia, but only 26% of patients without late potentials have inducible ventricular tachycardia. The incidence of late potentials was inversely correlated with left ventricular ejection fraction. CONCLUSION: The presence of late potentials was more frequent in patients with ventricular tachycardia than in patients with ventricular fibrillation. The presence of late potentials has a sensibility of 81.5% and a specificity of 78% to detect patients with inducible ventricular tachycardia.