Báo cáo sinh học: "Genetic and environmental factors affecting some reproductive traits of Holstein cows in Cuba" ppt

... quantitative inheritance XI Genetic and environmental... (1979) A significant increase in body size in comparison with both treated and control lines and in the size of the ... decrease in wing size and cell... stress In: Advances in Genetics (Scandalios JG, ed) Academic Press, San Diego, CA, vol 28, 73-97 Delcour J, Lints FA (1966) Environmental and genetic ... condition (Watkins and Goodell...

Ngày tải lên: 14/08/2014, 20:20

... of the individual in ao and a!, respectively. Note that this has the effect of increasing the size of the system of equations by twice the number of unknown dams of ... have a single progeny represented in a. Let P6 (of order a x b) and P (of order a x a) be matrices relating BV of progeny to BV of unknown and identified individuals, ... equations to be solved increases However, the procedure...

Ngày tải lên: 14/08/2014, 20:20

... during the hunting seasons of 1988-1989 and 1989- 1990 and stored at -20°C. Preparation of tissue extracts, electrophoretic and staining procedures and the genetic interpretation ... package of Felsenstein (see Felsenstein, 1985). To check the influence of sample size and the composition of genetic loci chosen, the statistical methods of bootstrap and ... of molecular evolutionary rates among...

Ngày tải lên: 14/08/2014, 20:20

... red deer, according to Lang (1987) all animals living in the Vosges originate from a small remaining population in the mountain range of Donon (m 500 individuals in 1870) From there ... Harris H, Hopkinson DA (1976) Handbook of Enzyme Electrophoresis in Human Genetics North Holland, Amsterdam Harris H (1980) The Principles of Human Biochemical Genetics North Holland, Amsterdam, ... If in the...

Ngày tải lên: 14/08/2014, 20:20

... variability of the traits. The estimates of heritability, genetic and phenotypic standard deviations and genetic coefficient of variation (defined as the ratio of the genetic standard ... traits were the following: milk, fat and protein yields, fat and protein contents. Day of kidding and age at kidding were also taken into account in the breed comparison ... fat and protein yields, fat and p...

Ngày tải lên: 14/08/2014, 19:23

... of a breeding , where I and L refer to the genetic superiorities and generation intervals of selected animals, and and C represent bulls and cows respectively Thus the average genetic merit of ... nucleus offspring and donors to breed nucleus offspring The expected steady state rates of annual genetic change are given in Table V In setting up a nucleus scheme, genetic response in the nucleus...

Ngày tải lên: 14/08/2014, 19:23

... Tucker HA (1989) Effects of infusions of various doses of bovine-growth-hormone-releasing factor on blood hormones and metabolites in lactating Holstein cows J Endocrinol 122, 671-679 Hanset ... intermediaries of lipid metabolism, creatinine (CREA) and urea (UREA), as indicators of protein degradation, and insulin-like growth factor-1 (IGF). Details of assay methodologies ... variability of p...

Ngày tải lên: 14/08/2014, 19:22

... Mediterranean and North-African origin of the cat introduced into Balearics,... points This can be proved by the existence of significant spatial autocorrelation of a clinal kind and of ... the population of Mahon (one of the assumed points of introduction of cats into Minorca). Percentage of genetic heterogeneity attributed to each locus and to each population ... tail). The inheritance and...

Ngày tải lên: 14/08/2014, 19:22

... Steinberg and Hunter, 1984): maximization of p and A-optimality (maximization of the trace of the coefficient matrix); and t maximization of p and D-optimality (maximization of the determinant of ... criterion concerning a linear combination of estimates The CD of a linear combination u’u will be a function of the ratio of the variance of x’u after the experiment to the variance of x’u before...

Ngày tải lên: 14/08/2014, 19:22

... the isofemale heritability according to Parsons (1983) and Hoffmann and Parsons (1988). Means and standard deviations of intraclass correlations are given in table IV. In both ... analyze their phenotypic and genetic variability for various kinds of traits, in order to determine whether they share similar genetic architectures. In this work, we have ... Original article Phenotypic and genetic...

Ngày tải lên: 14/08/2014, 19:22

... smaller and invest less into each offspring while Far Eastern populations develop more slowly, are larger and invest more energy into each individual (Taylor and Condra, 1980 and references ... patterns in the genetic variability of their natural populations. During the last 2 decades, they have been compared for numerous kinds of traits, including: chromosomal inversions ... 100); wing lengt...

Ngày tải lên: 14/08/2014, 19:22

... vector of random polygenic breeding values e = vector of random errors X,Z = known incidence matrices T = unknown incidence matrix indicating true major locus genotypes of all ... contains fixed and random effects, and the genetic sense (Morton and MacLean, 1974), as it contains a single locus and a polygenic effect. Strictly additive gene action of ... where xi and t ik are the ith rows of X...

Ngày tải lên: 14/08/2014, 19:22

... Agrifood Research Finland, 31600 Jokioinen, Finland 3 All-Russian Research Institute of Animal Genetics and Breeding, Russian Academy of Agricultural Science, 189620 St Petersburg-Pushkin, Russia 4 ... breed, was studied in Merino, Sarda Sheep and Finnsheep [6, 14, 23], in Holstein-Friesian cattle [8] and in the Lipizzan Horse [1]. These molecular studies showed that genetic profiles of farm a...

Ngày tải lên: 14/08/2014, 13:22

... daily gain. Changes due to selection have been widely reported in mice and estimation of realised heritability for post-weaning gain and realised genetic correlations for post- weaning gain and body ... modelling of heterogeneity is based on the hypothesis of the existence of a pool of genes controlling the mean of the performance and another pool of genes controlling the homogeneity of the ....

Ngày tải lên: 14/08/2014, 13:22

... knowledge of the biology and genetic control of the accumulation of androstenone and skatole in fat tissue Two QTL mapping studies have shown the complexity of the genetic control of these traits During ... synthesis or/and a low intensity of liver degradation or/and a low intensity of testicular metabolism 3.2 Genes involved in the testicular synthesis of androstenone The initial step in ste...

Ngày tải lên: 14/08/2014, 13:22