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Showing 1 to 7 of 7 for “"Progeny testing"”.
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Characteristics of progeny test herds and their effects on the genetic evaluation of young sires
Our purpose was to examine characteristics of progeny test herds and their effects on the genetic evaluation of young sires. Data for a study of response to pedigree selection by stud were evaluated from 6238 Holstein sires in four USDA animal model evaluations from January 1995 to February 1997. …
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Mælidagalíkan fyrir íslenska kúastofninn
… of estimated breeding values for bulls in progeny testing with artificial insemination and cows in production. Additive genetic variance was highest in the beginning of lactation for all traits in second and third lactation and FY and SCS in first. Permanent environment variance was highest …
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The use of real-time-ultrasound to predict genetic attributes of body composition traits in live beef cattle
… variance is reduced by increasing the number of progeny per sire. It is concluded that UPIFAT can be used to accurately rank sires BV for PIFAT by using progeny testing. When there are more than 8 progeny per sire, RTU determined BV are correlated with carcass determined BV at a level of.80.</p>
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Genetic improvement of swine
… especially in the Yorkshire breed. Where sib or progeny testing is being employed and test groups are not balanced for sex it is advisable to apply a sex correction to age at slaughter (adjusted to a constant carcass weight) before it is included in a selection index. Heritability estimates were …
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Predicting topcrossing performance of inbred and selection lines of beef cattle
… had been selected on individual performance or progeny testing, were mated to enough unrelated cows to produce thirty-two daughters. Sixteen from each set of the thirty-two daughters were randomly assigned to one of the four inbred lines and of the remaining sixteen, eight were assigned to the …
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Inheritance of smut in New Hampshire chickens
… clean male X clean females gave 11.4% smutty progeny, clean male X smutty females gave 30.2% smutty progeny. The smutty male X clean females gave 45.2% while smutty male X smutty females gave 69.4% smutty progeny. Of the chicks that had black heads or necks 76% showed smut as adults, but there …
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Physiological and genetic investigations of iron deficiency in field peas (Pisum sativum L.).
… for example individual F2 plants with progeny testing in the F3, to identify homozogyous tolerant selections. Although this project was not successful in identifying molecular markers linked to tolerance to Fe deficiency chlorosis, as molecular maps for field pea are further developed …