Citaat:
The effect of the WFFS carrier genotype was significant for six traditional evaluating traits in the NS horses, with an advantageous effect on the following traditional evaluating traits: the three movement traits (walk, trot, canter), temperament for gaits, dressage ability, and show jumping ability (Table 1 and Fig. 2). The most advantageous effect of the WFFS allele was found for dressage, with an effect of + 7.46 (+ 0.37 genetic standard deviation) from the comparison of WFFS/N and N/N horses, followed by + 6.95 (+ 0.35 genetic standard deviation) for the trait “temperament for gaits”. In contrast, the horses that were homozygous for the wildtype allele (N/N) scored on average 2.50 higher for show jumping (+ 0.13 genetic standard deviation) compared to horses carrying the WFFS allele (Table 1 and Fig. 2). For the linear descriptive traits, 507 NS horses had EBV that were not PA and were included in the analyses. The average reliabilities for those traits ranged from 0.61 to 0.81. Of the 50 linear descriptive traits, 19 were significantly affected by the WFFS carrier genotype in the NS horses (see Additional file 3: Table S2). Overall, according to the linear description, WFFS/N NS horses Page 7 of 16Ablondi et al. Genetics Selection Evolution (2022) 54:4 had a longer body, neck, and loins compared to N/N horses. They also had a more arched neck, lower with-ers, a shorter croup, the front legs were more over the knee, and had more paddling movements. Compared to N/N horses, WFFS/N NS horses had a more even walk in terms of cadence, were more supple, and with a longer stride, their trot was more elastic with a longer stride, their hind leg was positioned more under the body, and they had a more even rhythm in canter. When jumping, WFFS/N NS horses had lower scope, were less focused, less secure in the distance estimation, and more tense than N/N NS horses (Fig. 3).