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Studies on realized genetic gain in milk production traits


, : Studies on realized genetic gain in milk production traits. Tierzucht 37(8): 366-368

Annual genetic trends were estimated from trends in modified Contemporary Comparisons of 86 German Black Pied (GBP), 20 Jersey and 38 GBP X Jersey bulls with an average of 53, 155.8 and 83.3 daughters calving in 1967-1978, 1968-1980 and 1968-1980 resp.


Accession: 001469236

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Brade, W., 1983: Studies on realized genetic progress in milk performance traits. Tierzucht 37(8): 366-368

Puff, H., 1976: Expected and realized genetic gain in swine breeding of Lower Bavaria. I. Realized genetic gain

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Ducrocq V., 1984: Effects of selection for secondary traits on genetic gain for milk production in cattle. After successive selection on several traits, using the exact relationship of Jain and Amble, genetic gain could be computed by the algorithm of numerical integration of a multinormal distribution, proposed by Dutt. It reduces the usual restrictio...

Kallabis, P.; Mosenthin, J.; Klautschek, G.; Neumann, W., 1981: Methodical possibilities of evaluating the genetic progress and results of investigations into the realized breeding progress in milk performance traits in the Potsdam and Schwerin breeding areas. II. Results of investigations into the realized breeding progress in milk performance traits. 1st lactation records of 3594 cows in Potsdam province born in 1963, 1966 or 1969, and 7556 cows in Schwerin born in 1956-1972 were used. Lactation milk yield in the 2 areas resp. averaged 3934 and 3860 kg with coeff. of variation 18.2 and 10.8% r...

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Jain, L.S.; Banerjee, A.K.; Visvas, P.G.; Tailor, S.P., 1994: Incorporation of production efficiency traits and reproduction traits for maximisation of genetic gain. The efficiencies of 6 selection indices for Surti buffaloes, based on various combinations of milk yield, lactation length, calving interval, ages at first and second calvings and dry period, were compared. Although the highest net genetic economi...

Brade, W., 1984: Studies on the realised genetic gain in dairy traits during the development of Black Pied cattle. 3. Determination of the realised genetic gain in systematically bred mixed population. The animals used, described in Pt. 2 [see ABA 52, 6387], consisted of a Black Pied population containing infusions of Danish Jersey, British Friesian and Holstein-Friesian blood. Two methods were used to estimate realised genetic gain: (1) from da...

Brade, W., 1984: Studies on the realised genetic gain in dairy traits of Black Pied cattle. 2. Realised genetic gain of AI bulls of different genotypes. First-lactation records of 177 136 cows in 1967-80, representing the German Black Pied (GBP), Friesian and Jersey breeds and 12 crossbred combinations involving 2 or 3 of these breeds, were analysed. For the GBPs, Jerseys and crossbreds there were...