Abstract：
This study was attempted to estimate the genetic parameters of semen quality traits in buffalo bulls. The study data consisted of 10975 ejaculates from 45 Murrah buffalo bulls (aged 24-72 months) used for breeding program during year 2010 to 2020. Semen quality traits (ejaculate volume, concentration of sperm, mass activity, initial and post-thaw motility, number of sperms per ejaculate, motile sperm number and discard rates) were studied. It was observed that average ejaculate volume was 2.82 ± 1.45 mL with mean concentration of 1040.12 ± 523.26 million/mL. Higher heritability was observed for number of sperms per ejaculate, number of motile sperm and sperm concentration. Significant phenotypic correlation was obtained between volume and number of sperms per ejaculate as well as volume and number of motile sperms. Likewise, significant phenotypic correlation was evident between sperm concentration with sperm number per ejaculate. Highest phenotypic correlation was obtained between sperm count per ejaculate and motile sperm count. Estimated genetic trends showed significant change in volume and motile sperm number. In conclusion, this study ascertains that genetic parameters of semen traits can be considered during the selection of buffalo bulls in breeding program.
摘要：
本研究试图估计水牛公牛精液品质性状的遗传参数。研究数据包括2010年至2020年期间用于育种计划的45头Murrah水牛公牛（年龄24-72个月）的10975次射精。精液质量性状(射精量，精子浓度，群众性活动,初始和解冻后的运动性，每次射精的精子数量，活动精子数量和丢弃率)进行了研究。观察到平均射精量为2.82±1.45mL,平均浓度为1040.12±523.26百万/mL。每个射精的精子数具有较高的遗传力，活动精子数量和精子浓度。在每个射精的精子体积和数量以及活动精子的体积和数量之间获得了显着的表型相关性。同样，精子浓度与每次射精的精子数量之间存在显着的表型相关性。在每次射精的精子数量和活动精子数量之间获得了最高的表型相关性。估计的遗传趋势显示出体积和活动精子数量的显着变化。总之,本研究确定了在育种程序中选择水牛公牛时可以考虑精液性状的遗传参数。
