Zeng Yaqi, Meng Jun, Wang Jianwen, Kong Qisen, Li Linling, Ge Shimeng, Ren Xiang, Yao Xinkui, Liu Wujun
College of Animal Science, Xinjiang Agricultural University, Urumqi, China.
College of Animal Science, Xinjiang Agricultural University, Urumqi, China.
J Equine Vet Sci. 2019 Apr;75:19-24. doi: 10.1016/j.jevs.2018.12.022. Epub 2018 Dec 30.
In this study, we aimed to explore correlations among stride characteristics, time records, and bonus amounts to identify relevant indices for evaluating racing abilities of 2-year-old Yili horses. In total, 41 and 26 Yili horses were enrolled in the 1600 and 3600 m races, respectively. This experiment was performed by measuring their stride characteristics using a high-speed video and collecting time records during the competition and the bonus amounts. The results showed that the 2-year-old Yili horses' stride length (SL), stride frequency (SF), middle SL (mid SL), hind limb SL (hind SL), forelimb SL (fore SL), aerial duration SL (AD SL), stride angle, and advanced placement (AP) between the leading hind limb and trailing forelimb (AP LH-TF) were significantly and positively correlated with the bonus (P < .01). The bonus group had significantly higher values for these variables than the nonbonus group (P < .05); the stance duration and the overlap between LH and TF (overlap LH-TF) were negatively correlated with the bonus (P < .01), and the bonus group had a significantly lower overlap LH-TF value than the non-bonus group (P < .01). These findings indicated that 2-year-old Yili horses with greater SL, SF, mid SL, fore SL, AD SL, and stride angle values have better racing abilities. Likewise, smaller stance and overlap LH-TF values correspond to better horse racing abilities. The swing trailing hind limb, mid SL, AP LH-TF, and SF were filtrated by stepwise regression analysis as the primary indices for evaluating the racing ability of 2-year-old Yili horses.
在本研究中，我们旨在探索步幅特征、时间记录和奖金数额之间的相关性，以确定评估2岁伊犁马比赛能力的相关指标。总共有41匹和26匹伊犁马分别参加了1600米和3600米的比赛。本实验通过使用高速摄像机测量它们的步幅特征，并收集比赛期间的时间记录和奖金数额来进行。结果表明，2岁伊犁马的步长（SL）、步频（SF）、中间步长（mid SL）、后肢步长（hind SL）、前肢步长（fore SL）、空中步长时间（AD SL）、步幅角以及领先后肢与落后前肢之间的前进位置（AP）（AP LH-TF）与奖金显著正相关（P <.01）。奖金组这些变量的值显著高于无奖金组（P <.05）；站立时间以及后肢与前肢的重叠部分（重叠LH-TF）与奖金呈负相关（P <.01），奖金组的重叠LH-TF值显著低于无奖金组（P <.01）。这些发现表明，步长、步频、中间步长、前肢步长、空中步长时间和步幅角值较大的2岁伊犁马具有更好的比赛能力。同样，较小的站立时间和重叠LH-TF值对应着更好的赛马能力。通过逐步回归分析筛选出摆动落后后肢、中间步长、AP LH-TF和步频作为评估2岁伊犁马比赛能力的主要指标。
