Andrea Alves do Egito

Brazilian Agricultural Research Corporation (EMBRAPA) | Embrapa · Embrapa Beef Cattle

This study evaluated selection for backfat thickness based on genetic merit (GMB) in Nellore (N) and crossbred (½ Aberdeen Angus + ½ Nellore, AN) steers, as well as the effects of this selection on animal performance, carcass traits, and gene expression in subcutaneous adipose tissue (SAT). The animals were obtained by mating Nellore cows with Nell...

Cattle population history, breeding systems, and geographic subdivision may be reflected in runs of homozygosity (ROH), effective population size (Ne) and linkage disequilibrium (LD) patterns. Thus, the assessment of this information has become essential to the implementation of genomic selection on purebred and crossbred cattle breeding programs....

Na pecuária de corte brasileira, a intensificação sustentável visa otimizar o uso da terra, fazendo com que as áreas utilizadas atinjam, do ponto de vista econômico-ambiental, seu ponto ideal de produção, exercendo o efeito conhecido como poupa-terra. Para tanto, existem várias tecnologias empregadas na produção de carne bovina que, comprovadament...

The Brazilian Guzerá population originated from a few founders introduced from India. These animals adapted well to the harsh environments in Brazil, were selected for beef, milk, or dual-purpose (beef and milk), and were extensively used to produce crossbred animals. Here, the impact of these historical events with regard to the population structu...

The aim of this study was to explore spatial genetic structure patterns in cattle breeds adapted to local conditions in Brazil. We georeferenced 876 animals of ten breeds raised in Brazil kept in the Genebank of Brazilian Agricultural Research Corporation (Embrapa) by sample locations using the QGIS 2.4.0 software. The Mantel tests, spatial autocor...

RESUMO As raças taurinas de origem ibérica Limonero e Carora (Bos primigenius taurus) possuem o fenótipo de pelo curto, liso e com baixa densidade folicular, o que confere a esses animais maior tolerância térmica e melhor produtividade em regiões quentes. Diferentes mutações associadas a esse fenótipo foram descritas no gene do receptor de prolacti...

Growing concerns regarding sustainability in agriculture include the availability of drinking water, which is putting pressure on livestock production, especially the beef sector, for more efficient practices. Thus, genetic parameters were estimated for traits related to water intake and water use efficiency in Senepol cattle. Senepol females (n =...

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

Background: The cattle introduced by European conquerors during the Brazilian colonization period were exposed to a process of natural selection in different types of biomes throughout the country, leading to the development of locally adapted cattle breeds. In this study, whole-genome re-sequencing data from indicine and Brazilian locally adapted...

Recent molecular tools and technologies have marked the discovery of the origin and domestication processes of a wide variety of species, using either genomic or mitochondrial molecular markers to provide input for selection programs , as well as the management and conservation of animal breeds. This study aimed to analyze genes of mito-chondrial D...

This study examined the hair of Brazilian local cattle breeds in order to verify the possibility of use this technique as a racial marker. The trichological analysis is a non-invasive method that allows the determination of the species, or even the breed, of mammals by means of the combination of the main microstructures of the hairs. This kind of...

Cattle imported from the Iberian Peninsula spread throughout America in the early years of discovery and colonization to originate Creole breeds, which adapted to a wide diversity of environments and later received influences from other origins, including zebu cattle in more recent years. We analyzed uniparental genetic markers and autosomal micros...

Genetic diversity is one of the most important issues in studies on conservation of cattle breeds and endangered species. The objective of this study was to estimate the levels of genetic differentiation between locally adapted taurine (Bos taurus taurus) and zebu (Bos taurus indicus) breeds in Brazil, which were genotyped for more than 777,000 SNP...

The first horses were brought to Brazil by the colonizers after 1534. Over the centuries, these animals evolved and adapted to local environmental conditions usually unsuitable for exotic breeds, thereby originating locally adapted Brazilian breeds. The present work represents the first description of maternal genetic diversity in these horse breed...

The aim of this research was to evaluate pubertal development characteristics of Crioulo Lageano breed bulls (n = 10) using morphometric measurements and semen analysis, to identify factors that can be used to estimate age at puberty in this locally adapted breed. Monthly measurement of body weight and fortnightly measurement of scrotal circumferen...

A Embrapa Recursos Genéticos e Biotecnologia investe na conservação de recursos genéticos animais desde a década de 1980. O objetivo é preservar raças de animais domésticos de interesse zootécnico e econômico, conhecidas como localmente adaptadas, pois se desenvolveram no Brasil a partir de animais trazidos pelos colonizadores logo após o descobrim...

The objective of this study was to identify, through the DNA barcode, fishable Siluriformes which were collected from the Paraguay River basin in Pantanal. It was analyzed for genetic distance calculation using the Kimura-two-model parameters and the dendrogram was builtusing the Neighbour-Joining algorithm. The average genetic distance within spec...

The purpose of this study was to conduct the inventory of goat breed Gurgueia in the state of Piauí, Northeast region of Brazil. The inventory includes a historical survey - made by searching in the literature - and a population survey - made by gathering in loco information. The geographic location through GPS was taken in farms sheltering Gurguei...

Research conducted in different regions of the mitochondrial DNA of Ovis aries showed the existence of Asian and European haplogroups. The study aimed at applying the PCR-RFLP molecular test of mitochondrial gene cytochrome oxidase I with the restriction enzyme HinfI to molecularly characterize, over the existing haplogroups, some sheep breeds used...

The purpose of this study was to conduct the inventory of goat breed Gurgueia in the state of Piauí, Northeast region of Brazil. The inventory includes a historical survey - made by searching in the literature - and a population survey - made by gathering in loco information. The geographic location through GPS was taken in farms sheltering Gurguei...

The objective of this study was to compare physiological and thermographic responses to heat stress in three breeds of cattle. Fifteen animals of each of the Nelore, Pantaneiro and Curraleiro Pe-Duro breeds, of approximately two years of age, were evaluated. Heart and respiratory rates, rectal and surface temperature of animals as well as soil temp...

Given its history of near extinction, currently the Pantaneira cattle breed is subject to the dynamics and the risks inherent to the evolutionary processes that characterize small populations. Population studies have been conducted to the implementation of management plans and genetic handling of the breed. With this approach 204 animals that belon...

The maintenance of genetic variability in a population is important to guarantee the short and long-term responses to selection and to avoid problems with inbreeding. Thus, the objective of the present study was to investigate the genetic diversity of the Senepol breed in Brazil by pedigree analysis. The national pedigree file of the Senepol breed...

The aim of this study was to assess genetic variation between a population of Pantaneira sheep in the Brazilian state of Mato Grosso do Sul, and Creole sheep from the south of the country by molecular analysis of the ND5 gene in mitochondrial DNA. The analysis revealed the presence of 16 haplotypes with all Pantaneira sheep grouped together carryin...

A identificação de parâmetros/ métricas associados à adaptação ambiental é uma das principais tendências e desafios da pecuária mundial. Desta forma, o objetivo deste trabalho foi avaliar as características de tolerância ao calor de bovinos da raça Nelore e Pantaneiro no ecossistema do Pantanal matogrossense no pico de calor da região. Estes animai...

DNA BARCODE (ISBN 978-85-66836-07-3)

DNA BARCODE (ISBN 978-85-66836-07-3

Background The aim of the present study was to assess the genetic diversity of Pantaneiro sheep, using microsatellite markers, in order to assist maintenance and management plans, enhance mating systems and reduce the inbreeding rate. A total of 127 animals were genotyped at eight microsatellite loci. They belonged to populations from the Experimen...

As the aim of investigating the population structure of Brazilian bovine locally adapted breeds, 237 individuals from Caracu (n = 50), Creole Lageana (n = 39), Curraleira (n = 50), Mocha Nacional (n = 50) and Pantaneira breeds (n = 48) were genotyped with 28 microsatellite loci chosen from lists of FAO / ISAG and BIOBOVIS project. Indices of geneti...

Morphometry and ultrasound of carcasses were used to estimate the growth curve of Criola Lageana cows, raised under natural conditions. A total of 111 cows, raised under extensively production system in Central Plateau of Santa Catarina, were evaluated. Morphometrics and ultrasound measurements were related with the age of the animals using the tar...

Identification of parameters/metrics associated with environmental adaptation is one of the main trends and challenges for livestock worldwide. Thus, this study was conducted at Nhumirim Farm, in Nhecolândia, Pantanal, during the month of February, period with highest ambient temperatures. We used five cattle of each genetic group (White Nelore, Re...

Sheep of the Pantaneiro breed and seven other breeds, raised in the State of Mato Grosso do Sul, Brazil, were genotyped using eight microsatellite loci. The aim of the present study was to determine the genetic variability, phylogenetic relationship, and patterns of gene introgression and miscegenation among the animals surveyed, to obtain informat...

The objective of this study was to use morphometric and ultrasound evaluations to estimate the growth curve of the Pantaneiro cattle breed, raised in its natural habitat, aiming at the re-insertion of this breed in production systems. One hundred and three females, aging from months to 11 years, and raised on native pastures, were evaluated. The an...

investigación y otra almacenada en el Banco de ADN, mantenida en congelador a -80 o C. El Banco cuenta con 11.118 muestras de ADN de vacunos, equinos, mulas, búfalos, cabras y ovejas, así como aves y algunas especies productivas de tortugas, peces y roedores. El Banco contiene material para la caracterización molecular de las razas y la identificac...

The objective of this study was to evaluate and compare the transfer of passive immunity and the proteinogram in Criollo Lageano (CL) and Black and White Holstein (BWH) calves. Two groups were utilized with 13 Criollo Lageano and 10 BWH calves. Blood samples were collected for the measurement of total serum protein, electrophoresis of serum protein...

Genetic variability at 11 microsatellite markers was analyzed in five naturalized/local Brazilian horse breeds or genetic groups. Blood samples were collected from 328 animals of the breeds Campeira (Santa Catarina State), Lavradeira (Roraima State), Pantaneira (Pantanal Mato-Grossense), Mangalarga Marchador (Minas Gerais State), as well as the gen...

Studies were conducted to characterize the effect of season of the year on testicular morphology, fresh and frozen/thawed semen quality from Curraleiro (Pé-duro) bulls in the Brazilian Central west region. Five adult, healthy bulls underwent an andrological examination and semen collection using an electroejaculator, once a month for a year. Fresh...

The Guzerat breed is well adapted to the tropical conditions of Brazil. After 1940, the widespread use of Guzerat cattle for crossing has reduced its population size. In 1994, a selection program for milk production traits was initiated in some purebred herds. However, its success is compromised by genetic drift and an increased inbreeding coeffici...

The identification of new bovine male-specific DNA sequences is of great interest because the bovine Y chromosome remains poorly characterized in terms of physical and genetic maps. Since taurine and zebu Y chromosomes are structurally different, the identification of Y-specific sequences present in both sub-species is particularly important: these...

The genetic diversity within and between five genetic groups of pigs in Brazil, (n = 182) represented by three naturalized breeds (Moura, Piau and Monteiro), one commercial breed (Landrace) and one commercial composite (MS60) was estimated using 28 microsatellite markers. The genetic structure within these groups was also tested. The results showed...

El objetivo de este trabajo fue realizar un estudio preliminar del cariotipo de bovinos de razas brasileñas: Curraleiro, Crioulo Lageano y Junqueira disponibles en la granja Parque perteneciente a Embrapa Recursos Genéticos y Biotecnología, Brasília, DF y de los Pantaneiros ubicados en el norte del Pantanal, pertenecientes a la finca Promissão, Poc...

The present work is a preliminary cytogenetic study carried out on 29 males of the Brazilian breeds Curraleiro, Crioulo Lageano, Junqueira and Pantaneiro, available at Embrapa Genetic Resources & Biotechnology, Brasília, DF and Promissão farm, Poconé, MT. The objective was to investigate their Y chromosome morphology, whether submetacentric or acro...

Brazil has various species of domestic animals, which developed from breeds brought by the Portuguese settlers soon after the discovery of the country. After being submitted to a long process of natural selection, these breeds present characteristics adapted to specific Brazilian environmental conditions, and are known as "criollo", "local" or natu...

Most livestock are not indigenous to Brazil. Several animal species were considered domesticated in the pre-colonial period, since the indigenous people manage them as would be typical of European livestock production. For over 500 years there have been periodic introductions resulting in the wide range of genetic diversity that for centuries suppo...

Distribution of allele frequencies for the 22 microsatellites in the 10 cattle breeds raised in Brazil. Estimates of allele frequencies for the 22 microsatellites markers in the ten Creole and commercial cattle breeds raised in Brazil.

Blood samples were collected from Pantaneiro Horses in five regions of Mato Grosso do Sul and Mato Grosso States. Arabian, Mangalarga Marchador and Thoroughbred were also included to estimate genetic distances and the existing variability among and within these breeds by RAPD-PCR (Random Amplified Polymorphic DNA-Polymerase Chain Reaction) molecula...

Brazil holds the largest commercial cattle populations worldwide. Local cattle breeds can be classified according to their origin, as exotic or Creole. Exotic breeds imported in the last 100 years, both zebuine and taurine, currently make up the bulk of the intensively managed populations. Locally adapted Creole breeds, originated from cattle intro...

O objetivo deste trabalho foi avaliar medidas corporais associadas à tolerância ao calor em bovinos. Utilizaram-se 64 animais das raças naturalizadas Curraleiro (15), Mocho Nacional (7), Crioulo Lageano (7), Pantaneira (14) e Junqueira (11), e 26 animais de duas raças comerciais: Nelore (15) e Holandesa (11). Foram analisados dados sobre compriment...

The identification of new bovine male-specific DNA sequences is of great interest because the bovine Y chromosome remains poorly characterized in terms of physical and genetic maps. Since taurine and zebu Y chromosomes are structurally different, the identification of Y-specific sequences present in both sub-species is particularly important: these...

Oobjetivo deste trabalho foi caracterizar, por meio de marcadores RAPD, doisgrupos genéticos de búfalos, Carabao e tipo Baio, que estão sendo conservados in situ, assim como verificar as relações genéticas entre eles e os outros trêsgrupos genéticos de búfalos existentes no Brasil, Murrah, Jafarabadi e Mediterrâneo, considerados raças comerciais. F...

The objective of this work was to characterize genetically, using RAPD markers, twogenetic groups of buffalos, Carabao and Baio, which are being conserved in situ, as well as to verify the genetic relationship among them and the other threegenetic groups of buffalos raised in Brazil, considered as commercial breeds: Murrah, Jaffarabadi and Mediterr...

Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2006. 23 p. – (Documentos / Embrapa Recursos Genéticos e Biotecnologia, ISSN 0102-0110 ; 166)

The objectives of this work were to investigate the genetic structure of the Brazilian hair sheep breeds and to determine the origin of the Santa Inês breed. Molecular similarity was determined using Randomly Amplified Polymorphic DNA – Polymerase Chain Reaction markers in 238 individuals from five naturalized sheep breeds: Santa Inês (48 animals),...

The objectives of this work were to investigate the genetic structure of the Brazilian hair sheep breeds and to determine the origin of the Santa Inês breed. Molecular similarity was determined using Randomly Amplified Polymorphic DNA - Polymerase Chain Reaction markers in 238 individuals from five naturalized sheep breeds: Santa Inês (48 animals),...