19 uppsatser · sida 1 av 2
… and white setter, no calculations were made regarding genetic correlations and heritability. The hunting performance included 13 different traits. Due to the few observations for five of the traits, only eight traits were used in the analysis: speed, style, hunting eagerness …
… of chest and cannon bone. To analyse the data an animal model was used. Heritability varied for three-year-olds between 0.09 and 0.35 and for stallions between 0.003 and 0.04. Heritability for height at withers was 0.72 and 0.11 for the three-year-olds and stallions …
… Holstein and Swedish red and white dairy cattle. The results showed that the heritability of the heat intensity is low in dairy cattle; the heritability was around one percent both in the heifer period and in lactation one to three in both breeds. About one fourth of the herds …
… the variation in these milkability traits, estimate the repeatability and the heritability. The goal was to get an understanding of whether data from automatic milking systems can be used in future for evaluating breeding values for milkability traits. The study covered 2437 …
… explained by one broad trait, which I have called Herding characteristic. The heritability for Herding characteristic was estimated to 0.55 with standard error 0.055. To try to explain the outcome of the factor analyses, I have discussed two different models. According to the …
… programme a trait needs to have enough genetic variation, a moderate to high heritability or to be correlated to another measurable trait. Behaviour is a quantitative trait affected by many genes and the environment. The temperament of dairy cows has a moderate to high …
More than 1000 Swedish Warmblood foals are shown every year at foal inspections which are arranged around the country. Six traits are evaluated at these inspections: type, head-neck-body, correctness of legs, walk, trot and canter. No previous genetic studies have been done on …
finns det genetisk variation som kan användas i avelsarbetet?
The Swedish beef cattle population is growing when the dairy cattle become fewer. The fertility of the beef cows is important for the profitability in beef cattle production. Today there is no genetic evaluation for female fertility in Swedish beef cows. The purpose of this …
… a more obvious expression of oestrus. The ability to express oestrus has a low heritability and an unfavourable genetic correlation to milk production. Therefore it is very important to have good recordings of this trait and to consider the trait when breeding for increased milk …
… to know how long a large proportion of his daughters lived. Moreover, the heritability is low for longevity, and in the range between 0,03-0,26. Length of life differs in different beef breeds and is also affected by time of year when the cow gets her first calf and calving …
Osteochondros (OC) och osteochondrosis dissekans (OCD) är en störning i den indirekta, endochondrala bentillväxten hos unga snabbt växande hästar. När prestationskraven på hästen ökar vid en högre ålder kan det leda till att den utvecklar hälta. Flera studier har visat att …
… was to describe and estimate the prevalence of these defects and estimate the heritability for the most frequent defects, scrotal hernia and cryptorchidism in purebred Swedish Hampshire, Landrace and Yorkshire populations. Furthermore, information and opinions from herdsmen in …
… through controlled breeding, to make them less sensitive to the photoperiod. Heritability for fertility traits is low, but there is genetic variation in these traits which make selection possible. Nevertheless it has seemed difficult to make the animals completely aseasonal …
… important selection traits are unfavorably correlated and have low to moderate heritability. Therefore many traits have to be taken into account simultaneously and the genetic progress is slow. Consequently a long, sustainable breeding is required. Future improvements include …
… which cannot be identified by the MH that is being used today. Since the heritability for the behavior traits described in the MH is considered to be high enough to form the basis for an effective genetic evaluation for dog mentality, there are good possibilities to breed for …
