[Genetic interrelationship between lactation maturity, fertility and life productivity in Simmental cows].
In Ukrainian simmental heritabilities of maturity rate defined as ratio of the highest to first lactation yields were 0.17. Single lactation production and longevity are negatively correlated (-0.45). Waiting for third lactation records of test daughters and including secondary trains like reproduction or persistency into selection should slow down or stop the decrease.
Vinnichuk
D T
DT
D000818:Animals; D002417:Cattle / Q000235:genetics*; D005260:Female; D005298:Fertility / Q000235:genetics*; D007774:Lactation / Q000235:genetics*; D008136:Longevity / Q000235:genetics; D012741:Sexual Maturation / Q000235:genetics*
Geneticheskaia vzaimosviaz' mezhdu zrelost'iu laktatsii, plodovitost'iu i pozhiznennoĭ produktivnost'iu u simmental'skikh korov.