Komlósi István; Húth Balázs: Genetic parameters for fitness traits of the Hungarian Fleckvieh. In: Review on agriculture and rural development, (1) 1. pp. 5-9. (2012)
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Absztrakt (kivonat)
Genetic parameters were calculated and breeding value evaluation was introduced for heifer and cow fertility, calving ease and stillbirth. Regarding fertility traits, the number of inseminations to conception (NINS) and non-return rate until 56 days (NR56) of heifers, NINS, NR56 and days open of cows were evaluated by REML procedure. The h2 of the heifers’ two traits were 0.006 with a very strong genetic correlation (-0.95) between them. The h2 for cow fertility traits varied between 0.018 and 0.041. Due to the low correlation between heifer and cow fertility (r=0.14), it is recommend that selection be based on both age groups. For calving ease and stillbirth variance components estimation and breeding value prediction threshold model. The heritability of heifer direct calving ease was 0.070, the maternal heritability was 0.226, the cow direct and maternal heritability was 0.034 and 0.135 respectively. An antagonism were observed between direct and maternal calving ease both for heifers (-0.635) and cows (-0.453). The correlation between heifer and cow calving ease was 0.2, which necessitates a separate breeding value evaluation, and different use of bulls for heifers and cows. For stillbirth, direct h2 was 0.047, the maternal h2 was 0.053 for heifers’ stillbirth rate. The same parameters were 0.019 and 0.029 for cows. The genetic correlation between calving ease and stillbirth was 0.71 for heifers, and 0.43 for cows. Despite the decreasing tendency in stillbirth breeding value over the years, the inclusion of the trait in selection index is advisable for economic and animal welfare consideration.
| Mű típusa: | Cikk, tanulmány, mű |
|---|---|
| Befoglaló folyóirat/kiadvány címe: | Review on agriculture and rural development |
| Dátum: | 2012 |
| Kötet: | 1 |
| Szám: | 1 |
| ISSN: | 2063-4803 |
| Oldalak: | pp. 5-9 |
| Nyelv: | angol |
| Befoglaló mű URL: | http://acta.bibl.u-szeged.hu/39770/ |
| Kulcsszavak: | Természettudomány, Agrártudomány |
| Megjegyzések: | Bibliogr.: p. 8-9. |
| Szakterület: | 01. Természettudományok 01. Természettudományok > 01.06. Biológiai tudományok |
| Feltöltés dátuma: | 2016. okt. 17. 09:56 |
| Utolsó módosítás: | 2024. már. 26. 16:08 |
| URI: | http://acta.bibl.u-szeged.hu/id/eprint/30318 |
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