A scientific substantiation of the main directions program for creating a domestic breed red dairy cattle has been developed, which provides pure breeding and various cross-breeding options to obtain high-producing animals with good reproductive performance productive longevity.

Plant breeding largely depends on phenotypic selection in plots and only for some, often disease-resistance-related traits, uses genetic markers. The more recently developed concept of genomic selection, using a black box approach with no need of prior knowledge about the effect or function of individual markers, has also been proposed as a great opportunity for plant breeding. Several empirica...

The private sector is playing an increasingly important role in livestock genetic improvement. Specialized breeding firms now supply virtually all commercial poultry breeding stock and growing market shares of improved genetic material for swine, beef, and dairy cattle. This article examines how incentives for private investment in livestock breeding are affected by consumer demand, market stru...

The main purpose of this investigation was to evaluate the presence of Neospora caninum infection in beef cattle from Hamedan province, Western Iran. Blood samples were collected from 514 industrial beef cattle and tested using ELISA. IgG antibodies against N. caninum were found in 102 (19.8%) sera. Significant differences were observed between seropositive cattle and age group (p=0.022). No si...

John M. Marsh (406) 994-5621 [email protected] Prices received by cow-calf producers depend upon many factors including retail beef demand, red meat and poultry supplies, food safety, trade in live cattle and beef, and breeding cattle inventories. In addition, feed grain supplies and prices are important since they impact the cost of gain in cattle finishing. Cost of gain influences feedlot de...

Studies on bioecology of An. philippinensis a vector of malaria was carried out in eight islands of the Andaman group. It was found that An. philippinensis preferred to rest and bite outdoors. Maximum biting was observed during 1800 to 2100 hrs on both cattle and human bait. The maximum breeding of An. philippinensis was recorded in slow moving stream followed by ponds with vegetation. The bree...

We investigated the effect of stage of pregnancy on estimates of breeding values for milk yield and milk persistency in Gyr and Holstein dairy cattle in Brazil. Test-day milk yield records were analyzed using random regression models with or without the effect of pregnancy. Models were compared using residual variances, heritabilities, rank correlations of estimated breeding values of bul...

AIM The aim of the present investigation was to optimize the age at first use (AAFU) of semen of Murrah breeding bulls, which will help in early selection of bulls under progeny testing program for improving the reproductive performance in the herd. MATERIALS AND METHODS The data on AAFU, conception rate based on first A.I. (CRFAI), overall conception rate (OCR), and birth weight (B.WT) of 57...

INTRODUCTION In any discussion of beef cattle production in a particular environment the matter of climatic adaptability is of prime consideration. Adaptation for beef cattle might be defined as the ability to reproduce, grow and thrive under local environmental conditions. Much has been written about the ability or inability of temperate zone breeds of cattle to adapt to hot, humid, subtropica...

At present, bovine neosporosis is an important worldwide concern because of its wide geographic distribution and economic impact. Abortion is the main clinical sign of bovine neosporosis in both dairy and beef cattle. Ruminant challenge models are critical to evaluate potential vaccine candidates to help tackle bovine neosporosis and to study pathogenesis and host responses to infection. Severa...