Letícia Fernanda de Oliveira

• PhD in Animal Science
• Post-Doctoral Research Assistant at Purdue University West Lafayette

Background Heat stress (HS) poses significant threats to the sustainability of livestock production. Genetically improving heat tolerance could enhance animal welfare and minimize production losses during HS events. Measuring phenotypic indicators of HS response and understanding their genetic background are crucial steps to optimize breeding schem...

Introduction: Nellore cattle (Bos taurus indicus) is the main beef cattle breed raised in Brazil. This breed is well adapted to tropical conditions and, more recently, has experienced intensive genetic selection for multiple performance traits. Over the past 43 years, an experimental breeding program has been developed in the Institute of Animal Sc...

Background Non-additive genetic effects are often ignored in livestock genetic evaluations. However, fitting them in the models could improve the accuracy of genomic breeding values. Furthermore, non-additive genetic effects contribute to heterosis, which could be optimized through mating designs. Traits related to fitness and adaptation, such as h...

Non-additive genetic effects may have important roles in the phenotypic expression of performance and adaptation traits in livestock. Therefore, we aimed to evaluate the inclusion of non-additive genetic effects in genomic prediction models and variance component estimation of performance traits in a purebred pig population and heat tolerance indic...

This study is aimed at estimating genetic parameters, effective population size, inbreeding, and inbreeding depression for birth weight, weaning weight, and average pre-weaning daily weight gain (ADG) in Piau pigs. We used information from 3841 Piau pigs, and four linear models were fitted in single-trait analyses, including or excluding maternal g...

This study aimed to estimate genetic parameters, effective population size, inbreeding, and inbreeding depression for birth weight, weaning weight, and average pre-weaning daily weight gain (ADG) in Piau breed pigs. We used information from 3841 Piau pigs, and four linear models were fitted in single trait analyzes including or excluding maternal g...

We aimed to evaluate the effects of two brands of bST (bovine somatoropin) on productive performance and on Minas Padrão cheese yield. Fifteen Girolando cows with more than 60 days of lactation were used. The animals were distributed in a randomized block design, according to days in milk, with three treatments (somatotropin A, somatotropin B, and...

Resumo: Neste estudo, objetivou-se avaliar como diferentes herdabilidades e arquiteturas genéticas das características afetam a acurácia de predição genômica dos animais cruzados a partir de informações das linhas puras. Foram simulados quinze diferentes cenários considerando diferentes herdabilidades total (poligênica + QTL): 0,50, 0,30 e 0,10; e...

Objetivou-se avaliar o comportamento ingestivo de bezerros da raça Girolando recebendo duas estratégias de aleitamento. Foram utilizados 10 bezerros machos e 8 fêmeas distribuídos em um delineamento em blocos casualizados. As diferentes estratégias de aleitamento foram a oferta de 10 % do peso vivo (PV) em leite e 20 % do PV em leite nos primeiros...

l-arginine supplementation of sows has led to improvement of reproductive performance, but the mechanisms responsible for the positive effects of arginine during gestation on conceptuses survival and development are still poorly understood. Thus, we aimed to evaluate effects of 1.0% l-arginine supplementation (ARG) on phenotypic traits of commercia...

Resumo: A caracterização de raças naturalizadas é importante para que se possa traçar estratégias de conservação eficientes. Objetivou-se estimar parâmetros genéticos para peso ao nascimento e peso ao desmame para suínos da raça Piau. Foram utilizadas 3813 pesagens de leitões provenientes do programa de conservação de suínos da raça Piau da Unidade...