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Data corresponding to weights from birth to 90 days of age of 4 425 lambs, and to 3 355 litters at lambing of 964 ewes, taken from 1987 to 1995 were used. The main objective of the study was to quantify the possible relationship between litter size of the ewes and their maternal effects on offspring weights. The results showed that the additive genetic(More)
Lipoprotein lipase (LPL) is a glycoprotein that plays a central role in plasma triglyceride metabolism by hydrolyzing triglyceride-rich chylomicrons and very low density lipoproteins. The activity of milk LPL has been shown to differ among several goat breeds, suggesting the existence of a genetic polymorphism influencing the functional properties of this(More)
We develop a new discrete-time model, called the boundary-layer model, to describe the dynamics of single species that have a capacity for fast growth at very low population densities. The model explicitly separates the dynamics of the population at very low densities (within the "boundary layer") and at high densities. The boundary-layer model provides a(More)
The main goal of the current work was to infer the demographic history of seven Spanish goat breeds (Malagueña, Murciano-Granadina, Florida, Palmera, Mallorquina, Bermeya and Blanca de Rasquera) based on genome-wide diversity data generated with the Illumina Goat SNP50 BeadChip (population size, N = 176). Five additional populations from Europe (Saanen and(More)
Records from the milk recording scheme of Spanish Murciano-Granadina goats were studied to estimate genetic (co)variance components and breeding values throughout the first and second lactations. The data used consisted of 49,696 monthly test-day records of milk (MY), protein (PY), fat (FY), and dry matter (DMY) yields from 5,163 goats, distributed in 20(More)
In this paper we give an algorithm that detects real singularities and counts local branches of real rational curves without knowing an implicitization. The main idea behind this is a generalization of the D-resultant (see van den Essen and Yu (1997)) to n rational functions. This allows us to describe all the singularities as solutions of a system of(More)
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