Kiko is a meat breed of goats originating from New Zealand, they are recognized for their hardiness and parasite resistance. There is a lack of information on economically important traits for this breed in the US, particularly in the Southeast. The Kiko buck performance test allows producers to make educated breeding decisions through impartial data. These tests have occurred in the United States for years; however, this is the first buck test performed on commercial farm grazing conditions in Mississippi (MS). A goat that performs well in a test in another state may not perform well in high temperatures, humidity, ground moisture, and availability of parasites in MS. The objective of the test was to collect data on the performance of weaned Kiko bucks grazing under commercial farm conditions in south MS from July to October of 2023 (IACUC-23-138). Forty-five farmers from 14 different states (KY, OK, FL, NC, MS, AL, IN, IL, GA, TN, AR, VA, MO, and WV) consigned 88 Kiko bucks. Every 2 wk measurements were taken on the goats including body weight (BW), body condition score (BCS), FAMACHA, and fecal count of nematode eggs (FEC expressed as eggs per gram of feces – EPG), also at the start and end of the test loin eye area (LEA) was measured through ultrasound. Forage samples were collected for quality analysis, the average values starting the test were 13% CP and 47.4 TDN. Upon arrival, the bucks were dewormed using a combination of drugs, and after 2 wk of confinement went out with only grazing to start the 10 wk of test. During the test bucks were dewormed using the following parameters: >2,500 EPG and FAMACHA 4 or 5 or BCS < 1.5, any goat falling in these criteria was not considered for the final ranking. Bucks were separated into two groups: those born on or before February 8th, 2023 (group 1-G1, n = 44) and those born after (group 2-G2 n = 34). Ratios of the average daily gain (ADG), nematode FEC, and the ratio of LEA/BW were used in the final index. As all values are considered of equal economic importance, they all contributed the same to the final index. For G1 ADG, FEC, LEA/BW was 60 g/d (SD 20), 832.75 EPG (SD = 504.32), and 0.88 cm²/kg (SD = 0.20), respectively. For G2 ADG, FEC, and LEA/BW was 50 g/d (SD = 40), 907.86 EPG (SD = 492.61), and 0.81 cm²/kg (SD = 0.19), respectively. Bucks were ranked by highest index value in the group, for G1 the 1st place buck was from MS with ADG, FEC, LEA/BW of 90 g/d, 175 EPG, and 1.41 cm²/kg, respectively. For G2 the 1st place buck was from IN with ADG, FEC, and LEA/BW of 140 g/d, 116.67 EPG, and 1.00 cm²/kg, respectively.

中文翻译：

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111 密西西比州首次 Kiko Buck 性能测试

Kiko 是原产于新西兰的肉用山羊品种，因其耐寒性和抗寄生虫性而闻名。在美国，特别是在东南部，缺乏有关该品种经济重要特征的信息。Kiko 雄鹿性能测试使生产者能够通过公正的数据做出明智的育种决策。这些测试在美国已进行多年；然而，这是在密西西比州 (MS) 商业农场放牧条件下进行的首次降压测试。在另一个州的测试中表现良好的山羊可能在高温、潮湿、地面潮湿和多发性硬化症中寄生虫的情况下表现不佳。该测试的目的是收集 2023 年 7 月至 10 月断奶 Kiko 雄鹿在密西西比州南部商业农场条件下放牧的表现数据 (IACUC-23-138)。来自 14 个不同州（肯塔基州、俄克拉荷马州、佛罗里达州、北卡罗来纳州、密苏里州、阿拉巴马州、印第安纳州、伊利诺伊州、佐治亚州、田纳西州、阿肯色州、弗吉尼亚州、密苏里州和西弗吉尼亚州）的 45 名农民委托捐赠 88 美元。每两周对山羊进行一次测量，包括体重 (BW)、身体状况评分 (BCS)、FAMACHA 和粪便线虫卵计数（FEC 表示为每克粪便中的卵数 - EPG），也在开始和结束时进行测量通过超声波测量测试腰眼面积（LEA）。收集草料样品进行质量分析，开始测试的平均值为 13% CP 和 47.4 TDN。抵达后，雄鹿使用组合药物进行驱虫，2周后只放牧，开始10周的测试。在测试期间，使用以下参数对雄鹿进行驱虫：＞2,500 EPG和FAMACHA 4或5或BCS＜2,500。1.5，任何符合这些标准的山羊都不会被考虑进入最终排名。雄鹿被分为两组：2023 年 2 月 8 日或之前出生的（组 1-G1，n = 44）和之后出生的（组 2-G2 n = 34）。最终指数中使用了平均日增重（ADG）比率、线虫FEC以及LEA/BW比率。由于所有值都被认为具有同等的经济重要性，因此它们对最终指数的贡献相同。对于 G1 ADG，FEC、LEA/BW 分别为 60 g/d (SD 20)、832.75 EPG (SD = 504.32) 和 0.88 cm²/kg (SD = 0.20)。G2 的 ADG、FEC 和 LEA/BW 分别为 50 g/d (SD = 40)、907.86 EPG (SD = 492.61) 和 0.81 cm²/kg (SD = 0.19)。雄鹿按组内最高指数值进行排名，对于 G1，第一名雄鹿来自 MS，ADG、FEC、LEA/BW 分别为 90 g/d、175 EPG 和 1.41 cm²/kg。对于 G2，第一名来自 IN，ADG、FEC 和 LEA/BW 分别为 140 g/d、116.67 EPG 和 1.00 cm²/kg。