Crossbreeding to increase beef production: additive and non-additive effects on weight traits
نویسندگان
چکیده
منابع مشابه
Livestock Production Estimated Additive and Non - additive Breed Effects and Genetic Parameters for Ultrasound Scanned Traits of a Multi - breed Beef Population in Tropical Australia
Direct additive, dominance and genetic parameters for ultrasound scan traits of a multi-breed population involving European, British, Sanga and Brahman breed types were estimated. A generalized ridge regression technique was used to eliminate high associations among some of the genetic effects in the model. Clear breed type effects were observed for all scanned traits. European breeds had negat...
متن کاملCrossbreeding for dairy production in the lowland tropics of Kenya I. Estimation of individual crossbreeding effects on milk production and reproductive traits and on cow live weight
Crossbreeding parameters for milk production and reproductive traits and for cow live weight (LW) of crosses of Ayrshire (A), Brown Swiss (B), Friesian (F) and Sahiwal (S) cattle were estimated using data from a dairy herd in the lowland coastal tropics of Kenya. An individual animal model was fitted to the data to estimate the breed cross means of 25 genotypes. The means were then regressed on...
متن کاملAdditive Increase Appears Inferior
Feedback-based adjustment of load is a common mechanism for resource allocation in computer networks. This paper disputes the popular beliefs that the additive-increase multiplicative-decrease adjustment policy is optimal or even necessary for convergence to fair resource sharing. We demonstrate that, in the classic synchronous model, additive increase does not guarantee the quickest convergenc...
متن کاملCongruence of Additive and Non-Additive Effects on Gene Expression Estimated from Pedigree and SNP Data
There is increasing evidence that heritable variation in gene expression underlies genetic variation in susceptibility to disease. Therefore, a comprehensive understanding of the similarity between relatives for transcript variation is warranted--in particular, dissection of phenotypic variation into additive and non-additive genetic factors and shared environmental effects. We conducted a gene...
متن کاملNon-additive and additive genetic effects on extraversion in 3314 Dutch adolescent twins and their parents.
The influence of non-additive genetic influences on personality traits has been increasingly reported in adult populations. Less is known, however, with respect to younger samples. In this study, we examine additive and non-additive genetic contributions to the personality trait of extraversion in 1,689 Dutch twin pairs, 1,505 mothers and 1,637 fathers of the twins. The twins were on average 15...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: South African Journal of Animal Science
سال: 2013
ISSN: 2221-4062,0375-1589
DOI: 10.4314/sajas.v43i2.4