Heterosis for lifetime production in hereford, angus. Remote work advice from the largest allremote company. Reproductive records of beef cows were collected in 2000, 2001. This advantage was documented during a threeyear, realworld commercial heterosis project comparing progeny by hereford and angus bulls when crossed on angusbased cows. The user is free to download, print, store and share this work. Additive genetic group and heterosis effects on growth. Estimates of breed average direct, maternal and heterosis. American hereford harris heterosis project american. Sistema nervioso del bovino by maria alejandra rodriguez. Lifetime production of crossbred beef cows 2399 1971 breeding seasons and to multisire breeding pastures for the 1972 through 1975 breeding seasons, according to the mating plan of the.
The genetics and exploitation of heterosis in crops. Pdf heterosis for lifetime production in hereford, angus. Maternal and heterosis effects were not significant p 0. Efectos geneticos directos, maternos y heterosis individual. Heterosis is a phenomenon in which a progeny of distinct individuals exhibitshigherlower values for the traits than the average of. The study also documented a maternal advantage of 7% higher pregnancy rate when comparing the herefordsired females to. Combining ability and heterosis for yield and related. Analysis of mid and better parent heterosis indicates the existence of sufficient heterosis on fresh and dry fruit yield and oleoresin content 45 abrham s, mandefro n, sentayehu a. After maize hybrid was first utilized in field on a large scale in usa in 1930s, heterosis of other crops such as rice, sorghum, rape, and vegetable etc began to be widely used in production, and had made great achievements in crop breeding by the end of last century, mainly contributed to notable increasing of crop yield. Download fulltext pdf heterosis for lifetime production in hereford, angus, shorthorn, and crossbred cows article pdf available in journal of animal science 708. Heterosis, hybrid vigor, or outbreeding enhancement is the improved or increased function of any biological quality in a hybrid offspring.1241 1241 863 1443 1120 1397 497 901 628 1383 1148 803 881 1373 1448 374 599 406 1018 734 757 186 1045 970 200 1106 1359 499 59 1302 238 1030 1194 1017 367 866 54 1458 1340 513