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1.
陇东绒山羊新品种培育的研究 总被引:2,自引:2,他引:0
引入辽宁绒山羊杂交改良陇东黑山羊,经过省市县科技人员30余年的联合攻关和科学研究,培育出陇东绒山羊新品种,数量达22162只,其产绒量公、母羊分别为562.50±103.21g和440.4±83.24g,比同龄陇东黑山羊分别增绒397.5g和304.4g,差异极显著(P〈0.01);比同龄辽陇杂种公母羊分别增绒155.15g和176.08g,差异显著(P〈0.05);羊绒细度公母羊分别为14.82um和14.89um;羊绒伸直长度分别为87.36mm和81.09mm;强度3.89g;伸度41.14%;含绒率47.46%。符合国际羊绒精纺要求和同类纤维理想水平。 相似文献
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通过5年的联合攻关,培育出了高产优质的品种类群羊1.68万只,其中精选群羊2896只,基础羊13900只。其产绒量精选群公母羊分别为586.22、417.78g,比同龄同性别选育前杂种羊分别提高66.04%和44%,差异均极显著(P<0.01);基础群成年母羊产绒量349.89g,比选育前杂种母羊提高18.77%,差异显著(P<0.05);羊绒细度公母羊分别为14.89μm和14.75μm;羊绒长度公母羊分别为8.22cm和7.25cm,符合国际羊绒精纺要求和同类纤维理想水平。 相似文献
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为了进一步培育优质高产陇东绒山羊群体,利用引进的绒细型和绒长型种公羊进行分区域杂交改良和品系繁育,培育出适宜陇东干旱半干旱自然生态条件的陇东绒山羊专门化品系。培育结果表明:绒细型特一级成年公母羊平均产绒量分别为601.67g和465.76g,体重分别为36.16kg和29.31kg,羊绒细度分别为14.49μm和14.25μm;绒长型特一级成年公母羊平均产绒量分别为626.49g和506.37g,体重分别为37.74kg和29.65kg,羊绒细度分别为15.02μm和14.82μm。同时利用微卫星DNA技术研究了9对基因座位在陇东绒山羊群体中的遗传多样性,通过标记多态性与生产性状的最小二乘线性模型,进行了分子标记与经济性状的相关分析,并在这些位点上找到经济性状优势基因型以及对相应性状具有正效应或负效应的等位基因。 相似文献
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选育和提高陇东绒山羊的生产性能,以陇东绒山羊为试验动物,采用数量遗传学和现代繁殖新技术,在甘肃东部地区选育出陇东绒山羊专门化新品系,数量达到18 685只,其中绒长型9 632只,绒细型9 053只。新品系被毛全白,以产绒为主,绒肉兼用,两品系特一级成年公母羊产绒量分别为626.49 g、506.87 g和601.67 g、465.76 g;羊绒细度分别为15.02μm、14.82μm和14.49μm、14.25μm;羊绒伸直长度分别为90.37 mm、75.82 mm和85.41 mm、79.78 mm;春季体重两品系公母羊分别为36 kg和28 kg以上,屠宰率为47.68%,经产母羊产羔率105%。选育结果陇东绒山羊专门化品系外貌特征一致,遗传性能稳定,白色个体稳定在97.6%以上,繁殖性能良好,其中双羔率占约5%。陇东绒山羊专门化新品系具有体质结实,角型整齐,被毛全白,产绒量高,羊绒品质优良,耐粗饲,抗病力强,适应干旱环境条件等优点。 相似文献
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通过对陇东绒山羊的选育和提高,组建了陇东优质高产绒山羊群,其成年公母羊产绒量分别为693.75±135.29 g和493.46±93.78 g,和陇东绒山羊新品系公母羊相比,产绒量显著提高(P〈0.05);公母羊羊绒细度分别为15.03±0.85μm和14.56±0.76μm,和陇东绒山羊相比,差异不显著(P〉0.05);公母羊羊绒的自然长度分别为5.89±0.63 cm和5.26±0.37cm,和陇东绒山羊相比,差异显著(P〈0.05)。因此,陇东优质高产绒山羊产绒量高,羊绒纤维细、长、延伸性好,属优质山羊绒,符合国际羊绒精纺要求并达到了同类纤维理想水平。 相似文献
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为研究牙山黑绒山羊不同年龄的产绒规律,选取240只1~8周岁牙山黑绒山羊母羊,测定放牧条件下绒山羊的产绒性能与绒毛品质。结果表明:在产绒量方面,相邻年龄间牙山黑绒山羊母羊产绒量、绒长度和绒细度均有极显著差异(P0.01);1周岁母羊产绒量最低(379.74 g),2~4周岁母羊产绒量呈逐年增长趋势(475.09~502.63 g),5周岁以后开始下降(466.95 g);在羊绒长度方面,1周岁母羊绒长度最短(5.78 cm),2~4周岁绒长度呈逐渐增长趋势(6.43~6.72 cm),4周岁母羊绒长度最长(6.72 cm),5周岁母羊绒长度开始下降(6.45 cm);在羊绒细度方面,1周岁母羊羊绒细度最小(14.43μm),2~5周岁母羊绒细度呈逐渐增长趋势(15.27~15.86μm),5周岁时达到最粗(15.86μm)。由此可见,牙山黑绒山羊母羊产绒性能和绒毛品质在2~4周岁时达到最佳阶段,5周岁以后产绒性能和绒毛品质开始下降。 相似文献
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引入辽宁绒山羊,杂交改良陇东黑山羊,经过省市县科技人员联合攻关,培育出了适应华池当地自然条件的陇东白绒山羊品种类群羊7 659只,其年产绒量公、母羊分别为528.36 g和361.47 g,比同龄陇东黑山羊分别提高90.48%和160.16%,差异极显著(P<0.01);比同龄辽陇杂种公母羊分别提高29.71%和36.75%,差异显著(P<0.05);羊绒细度公母羊分别为14.89μm和14.75μm;羊绒长度公母羊分别为8.22 cm和7.25 cm,符合国际羊绒精纺要求。 相似文献
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陇东绒山羊专门化新品系培育的研究 总被引:2,自引:2,他引:0
对陇东绒山羊的选育和提高,组建了陇东绒山羊绒长绒多型和绒细绒密型专门化新品系,其产绒量两品系公母羊分别为586.32±121.39g、467.48±95.16g和579.28±113.26g、456.13±80.78g,和陇东绒山羊公母羊相比,产绒量有一定提高,但差异不显著(P〉0.05);羊绒细度两品系公母羊分别为14.95±0.83μm、14.89±0.86μm和14.68±0.79μm、14.45±0.81μm,和陇东绒山羊相比,差异不显著(P〉0.05)。 相似文献
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本文系统分析了环境因素对辽宁绒山羊绒直径的影响、绒直径的遗传特点及其群体绒直径的分布情况。羊绒自根部至尖部逐渐变粗,尖部与根部绒直径相差3.31μm;体躯绒直径最小部位与最大部位差异为2.09μm;3周岁时绒直径最大,公羊平均绒直径比母羊高1.0μm;同一公羊雄性后代的绒直径比雌性后代平均高0.51μm;公羊年龄对后代具有显著的影响(P<0.05);绒直径的遗传力为0.421,与产绒量、体重的遗传相关分别为0.658和0.112。部分公羊的后代具有产绒量高、体重大而绒直径小的理想组合。在整个群体中26.40%的母羊和53.51%的公羊生产14.5μm以下的羊绒,9.6%的3周岁母羊和5.9%的3周岁公羊生产14.5μm以下的羊绒 相似文献
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通过 6年的联合攻关 ,我们培育出了适应华池当地自然条件的高产优质品种类群羊 765 9只 ,其中精选群羊 869只、基础群6790只 ,其产绒量精选群公母羊分别为 616.0 5 g和 43 3 .3 9g ,比同龄同性别辽陇杂种羊分别提高了 5 1.2 3 %和 63 .96% ,差异均极显著 (P <0 .0 1) ;基础群公母羊分别产绒 5 0 3 .2 6g和 3 5 1.63 g ,比同龄同性别辽陇杂种羊分别提高了 2 3 .5 4%和 3 3 .0 3 % ,差异均显著(P <0 .0 5 ) ;羊绒细度公母羊分别为 14 .89μm和 14 .75 μm ;羊绒长度公母羊分别为 8.2 2cm和 7.2 5cm ,符合国际羊绒精纺要求并达到了同类纤维理想水平。 相似文献
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试验测定了陇东绒山羊生长发育规律。结果表明:陇东绒山羊在哺乳期生长发育快,日增重高,6月龄公母羊体质量分别为14.37kg和13.23kg,是出生时的6.3倍和5.8倍,日增重分别为67.05g和60.83g,公羊生长发育速度快于母羊,差异不显著(P〉0.05);周岁公母羊体质量分别为18.52kg和17.94kg,日增重分别为23.06g和26.17g,母羊生长发育速度快于公羊,差异不显著(P〉0.05);2岁公母羊体质量分别为29.45kg和23.84kg,日增重分别为29.95g和16.16g,公羊生长速度快于母羊,差异显著(P〈0.05);成年公母羊体质量分别为33.77kg和24.01kg,日增重分别为11.58g和0.47g,公羊生长速度快于母羊,差异极显著(P〈0.01);成年以后,公母羊体尺体质量指标均有所下降。因此,应抓好各年龄阶段特别是哺乳期及育成期的饲养管理,以保证和充分发挥绒山羊的生产性能。 相似文献
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This study was designed to investigate the effects of tryptophan (Trp) supplementation on cashmere fiber characteristics and on serum Trp, melatonin (MEL), prolactin (PRL), insulin-like growth factor 1 (IGF-1), triiodothyronine (T(3)), and thyroxine (T(4)) concentrations in cashmere goats during the cashmere fast-growth period. Thirty-six Liaoning cashmere wether goats were stratified on the basis of body weight (28 ± 0.8 kg) and assigned randomly to 1 of the following 4 rumen-protected Trp treatments: 0, 2.0, 4.0, and 6.0 g per goat per day. The experimental period lasted 137 d. Blood samples were collected monthly during the daytime (8:00 AM) and at night (8:00 PM). Tryptophan supplementation improved cashmere growth rates, cashmere weight, and body weight (P = 0.001) and increased serum Trp levels, nighttime MEL concentrations, IGF-1, and T(3) and T(4) concentrations (P < 0.05). Across the treatments and sampling months, a highly positive correlation between cashmere growth rate and nighttime serum MEL concentrations was observed (r = 0.879, P = 0.001). A moderately negative correlation between cashmere growth rates and serum PRL concentrations during the day and at night (r(day) = -0.645, P = 0.007; r(night) = -0.583, P = 0.018) was observed. A moderately positive correlation between the cashmere growth rate and the daytime serum IGF-1 concentration (r = 0.536, P = 0.032) was observed, and no correlation was found between the cashmere growth rate and the other serum hormone concentrations. These data indicate that changes in serum concentrations of MEL, IGF-1, and PRL are related to cashmere growth in Liaoning cashmere goats during the cashmere fast-growth period. Under the experimental conditions of the current trial, we suggest that Trp may promote cashmere growth by increasing daytime IGF-1 and nighttime MEL secretion. 相似文献
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陇东绒山羊皮肤毛囊发生发育规律研究 总被引:3,自引:0,他引:3
对陇东绒山羊进行皮肤切片制作,实验室显微观测毛囊发生发育情况。结果表明:陇东绒山羊羔羊初生时初级毛囊已发育完全;6月龄时次级毛囊发育成熟。皮肤毛囊深度、宽度、密度、活性及s/p值随季节,以年为周期呈规律性变化。s/p值母羔6月龄时(11.2±1.9)、母羊周岁及2岁期9月份(11.5±1.0、11.5±2.1)、公羔6月龄时(11.2±1.2)最大,s/p值与绒毛的生长发育相关,具有品种特性,可以作为间接选择指标进行早期选择。 相似文献
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The aim of this study was to investigate the effects of cyclophosphamide (CPA) on cashmere shedding in cashmere goats. Thirty‐two castrated Liaoning cashmere goats were randomly allotted to four groups, with eight replicates in each group. The four groups were injected intravenously with CPA doses of 0, 15, 20 and 25 mg/kg body weight, respectively. Feed intake, body weight, body temperature, and sphygmus were recorded and the erythrocyte count, leukocyte count, hemoglobin content, and cashmere yield and length were determined. CPA has no significant effect on feed intake, body weight, body temperature, or sphygmus of cashmere goats. It was found that CPA significantly decreased the erythrocyte count and hemoglobin content in cashmere goats on the days immediately following injection, but the effects on erythrocytes diminished within 6 days, with hemoglobin content returning to normal within 10 days. Cashmere fiber began to shed on about day 10 after injection with CPA. CPA had no significant effect on cashmere length but significantly increased cashmere yield. The results indicate that CPA can induce cashmere shedding and achieve the purpose of concentrated defleecing. A dose of 20 mg/kg body weight is preferable for hair removal and regrowth in cashmere goats. 相似文献
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贵州黑马羊的选育 总被引:1,自引:0,他引:1
试验采取在农家组建核心群、基础群的开放式选育路线,制订初步淘汰标准、综合选择指数,指导整群淘汰、选种选配。结果发现,选育后核心群周岁公母羊体重分别为29.77 kg±5.51 kg、25.18 kg±5.67 kg,成年公母羊体重分别为40.08kg±7.73 kg3、4.90 kg±6.56 kg;选育后基础群周岁公母羊体重分别为26.59 kg±3.68 kg、24.09 kg±4.60 kg,成年公母羊体重分别为35.33 kg±4.09 kg3、2.16 kg±6.83 kg;产羔率达152.33%。经t检验,选育后核心群周岁公母羊、基础群周岁公母羊、成年公母羊平均体重极显著高于选育前的平均体重(P0.01)。无角对有角是显性,山羊间性与无角存在连锁关系。 相似文献