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| Molecular genetics is an additional tool which provides information for the detection and exploitation of genes or chromosomal regions with large influence on economic traits. This comes from the development of dense maps of linkage disequilibrium among genetic markers for many livestock species. Although each type of genetic marker has advantages and disadvantages, the only polymorphisms with enough density to meet important requirements for gene mapping are the Single Nucleotide Polymorphisms Status: Completed Start date: Tue Jan 01 00:00:00 GMT-03:00 2013 |
| raditional breeding has generated significant genetic gain over time. However, this strategy falls short of yielding information on the biological processes involved. Additionally, there are great difficulties for the genetic improvement of characteristics which are measured solely in one gender and/or late in the life span of the animal. With the development of DNA chips it became possible maximizing genetic gain by reducing the generation interval and increasing the intensity of selection. The Status: Completed Start date: Wed Sep 01 00:00:00 GMT-03:00 2010 |
| Recent evidence from observational studies and controlled clinical trials indicates that milk fat, although predominantly saturated, has neutral or positive effects on cardiometabolic health. Such benefits have been attributed to the complex and unique chemical nature of milk fat, which contains several compounds potentially beneficial to health, such as butyric acid (C4:0), vaccenic acid ( trans-11 C18:1), rumenic acid ( cis--9, trans-11 CLA), oleic acid ( cis-9 C18 ... Status: Completed Start date: Tue Jan 01 00:00:00 GMT-03:00 2019 |
| Recent evidence from observational studies and controlled clinical trials indicates that milk fat, although predominantly saturated, has neutral or positive effects on cardiometabolic health. Such benefits have been attributed to the complex and unique chemical nature of milk fat, which contains several compounds potentially beneficial to health, such as butyric acid (C4:0), vaccenic acid ( trans-11 C18:1), rumenic acid ( cis--9, trans-11 CLA), oleic acid ( cis-9 C18 ... Status: Completed Start date: Fri Jul 01 00:00:00 GMT-03:00 2016 |
| Selection for desirable bovine phenotypes has been practiced since the domestication of cattle, which occurred approximately 10,000 years ago. This process of domestication has brought about a marked change in behavioral and morphological characteristics in the subspecies and, together with the development of breeds and genetic breeding programs, has given rise to the enormous variety of patterns and racial types known today. Since then, traditional breeding tools, based on quantitative theory, Status: Completed Start date: Thu Jan 01 00:00:00 GMT-03:00 2015 |
| Selection for desirable phenotypes has been practiced in cattle since their domestication approximately 10,000 years ago. This process, alongside breed development and genetic improvement programs, has led to the vast diversity of cattle breeds known today. Traditional breeding methods, grounded in quantitative theory, have facilitated continuous genetic gains in most economically important traits. However, until recently, selection has been conducted without knowledge of the specific genes infl Status: Completed Start date: Tue Jan 01 00:00:00 GMT-03:00 2019 |
| Heat along with high humidity is one of the causes of impaired milk production and fertility of cattle, especially in the summer or in tropical and semitropical regions. Such problems can be aggravated with the prospect of global warming. In the hottest regions of Brazil there is a preference for crossbred Holstein (H) X zebu (Z), mainly Gir (G) cattle that form the Girolando synthetic breed whose composition is mainly ⅝ GxH. Girolando animals are more tolerant to heat than breeds of European or Status: Completed Start date: Wed Jul 01 00:00:00 GMT-03:00 2015 |
| Cattle farming is one of the most important activities of Brazilian agribusiness. Brazil is the world's largest beef exporter, holds the world's largest commercial herd, and is the world's third largest producer and consumer of beef and the world's seventh largest milk producer, with about 4% of the world's total. In spite of its large overall production, Brazilian cattle farming remains low in productivity, indicating a great potential for improvement and expansion of this sector of the economy Status: Completed Start date: Tue Jan 01 00:00:00 GMT-03:00 2008 |