Genetic and environmental effects upon dairy cows performance in particular life periods

Sawa, A.

Genetic and environmental effects upon dairy cows performance in particular life periods

1998

Sawa, A.

The main aim of this work was an analysis of some genetic phenomena (addition, heterosis, recombination losses), resulting from crossbreeding of local cattle with Holstein Friesian cows, and evaluation of fundamental genetic parameters (heritability, repeatability, correlation) of milky dairy performed on the basis of data taken from the Regional Breeding Office in Bydgoszcz in the period 1988-95. The influence of genetic (G), environmental (E) and interaction (GxE) factors on the lifetime production of cows was also taken into consideration. Evaluation of parameters connected with the investigated factors, allowed to point out the reasons of appearance of extremal lifetime milk production values and "insignificant traits"

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AGROVOC Keywords

age structure animal reproducteur animal reproductor breeding stock crossbreds culling dairy cows environmental factors estructura por edades facteur du milieu factores ambientales genetic parameters genotipos genotype environment interaction genotypes lactation duration longevidad longevity milk yield poland pologne polonia productos del cruzamiento produit de croisement rendement laitier rendimiento lechero vacas lecheras

Bibliographic information

Published in

Akademia Techniczno-Rolnicza w Bydgoszczy. Rozprawy (Poland)

Issue 88 ISSN 0209-0597

Publisher

Wydawnictwo Uczelniane ATR

Pagination

68 p.

Other Subjects

Parametre genetique; Interaction genotype environnement; Repartition des ages; Interaccion genotipo ambiente; Genotype; Reforme des animaux; Duracion de la lactancia; Eliminacion; Duree de la lactation; Longevite; Parametros geneticos; Vache laitiere

Language

Polish

Note

Summary (En)

10 fig., 22 tables; 129 ref.

Translated Title

Genetyczne i srodowiskowe uwarunkowania uzytkowosci krow w poszczegolnych okresach zycia

Type

Summary; Thesis; Bibliography

Corporate Author

Akademia Techniczno-Rolnicza, Bydgoszcz (Poland). Wydzial Zootechniczny

In AGRIS since: 1999-08-15

Format: AGRIS AP

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Genetic and environmental effects upon dairy cows performance in particular life periods

1998

AGROVOC Keywords

Bibliographic information