共查询到20条相似文献，搜索用时 78 毫秒
1.
平武黄牛本尺外貌的研究 总被引：1，自引：1，他引：0
对平武黄牛主产区生态条件的调查,外貌的观察和体尺的测定,与四川现有黄牛地方品种的比较分析,结果表明平武黄牛在体尺,外貌,体尺指数等方面有别于其它黄牛品种,是川西北山区良好的役用型黄牛种群,具有向役肉兼用型方向发展的优良特性。 相似文献
2.
3.
4.
秦川、淮北及秦淮Ｆ_１黄牛体尺体重回归分析焦平林（安徽省蒙城县农牧渔业局，２３３５００）秦川牛原产渭河流域，属我国优秀的肉役兼用型黄牛品种．近年来许多省区都引进了秦川公牛或冻精改良本地黄牛，仅安徽淮北地区目前秦川杂交牛存栏比重就达３０％以上。为了解秦?.. 相似文献
5.
利木赞牛与延边黄牛杂交效果的研究 总被引：4，自引：0，他引：4
延边黄牛是我国五大地方优良品种之一，是我国宝贵的黄牛资源，原产于朝鲜及我国延边朝鲜族自治州。延边黄牛体躯粗壮结实、结构匀称、骨骼致密，具有耐寒、耐粗饲、抗病力强、肉质细嫩、肉味鲜美等特点，属寒温带山区的役肉兼用品种。但由于饲养管理不善，使该品种牛生长慢、产肉少。为了适应市场经济的需要，保持该品种优良性状，提高屠宰率，使延边黄牛由役肉兼用型向肉役兼用型发展， 相似文献
6.
7.
黄牛体尺差异性分析方法的研究 总被引：5，自引：0，他引：5
本研究借助于IBM电子计算机、运用最小二乘分析、主成分分析和聚类分析法对较复杂、难以直观分析的7个黄牛品种的8项体尺资料,经过一系列完整的处理运算,最终给出了形象逼真,使人容易理解和分析的简化形式的数据结构和图形,从而容易揭示出一些有意义的规律。研究结果把7个黄牛品种依体格大小分为大、中、小三种类型群,这与现存事实基本相符,借此方法可大大提高比较品种差异的准确性。 相似文献
8.
9.
10.
旨在鉴定固原黄牛是相对独立的肉牛遗传资源，进一步描述其生长发育规律，为固原黄牛肉用种质资源的鉴定和选育提供一定的理论依据。本研究通过历史文献和调查研究分析固原黄牛的演变历史；使用GGP Bovine 100K基因芯片检测和公共数据库中下载包括固原黄牛在内共计13个品种、337个个体全基因组遗传变异数据，通过多维标度分析和构建邻接法系统发育树，分析固原黄牛遗传背景；以红安格斯牛×固原黄牛杂交牛为对照群体，测定与收集不同生长发育阶段固原黄牛的体重、体尺、背膘厚和眼肌面积等表型数据，参照《中国畜禽遗传资源志·牛志》公开发表的秦川牛和蒙古牛的表型数据，从表型描述挖掘固原黄牛相关指标的群体规律。结果表明，固原黄牛是固原本土黄牛与周边蒙古牛和秦川牛相互影响，经过长期选育形成的体型外貌一致的独特类群；现存固原黄牛群体在遗传结构上与邻近的秦川牛和晋南牛遗传关系较近，是相对独立的资源群体；与固原黄牛青年母牛相比较，固原黄牛成年母牛体躯指数提升了9.57%;用红安格斯牛杂交改良后，固原黄牛杂交牛母牛胸围指数和体躯指数分别提升了11.59%、12.70%,固原黄牛杂交牛公牛体长指数、胸围指数分别提升了15.... 相似文献
11.
12.
如皋鸡生长发育规律和体尺性状研究 总被引：4，自引：0，他引：4
本试验对0～12周龄如皋鸡的体重生长规律及12周龄体尺性状进行了研究。结果表明：①1～12周龄公母鸡间体重存在极显著差异（P<0.01），公鸡的体重整齐度较差；②Gompertz模型能很好地描述鸡体重生长模式（R2＞0.996）,其生长拐点在6～7周龄，如皋鸡成熟体重和生长高峰体重的遗传力均为0.09，初生重估计值、平均生长速率、生长高峰周龄的遗传力分别为0.21、0.32、0.37；③用全同胞和半同胞2种遗传模型估计的体重方差组分及遗传力结果有明显差异。用全同胞遗传模型计算的公鸡体重遗传力明显高于母鸡（都是高遗传力），体重遗传力总体上随饲养周龄的增长呈下降趋势，随周龄增加母本效应越来越小，并且公鸡受母本效应的影响明显大于母鸡，用半同胞遗传模型计算的公鸡体重遗传力7周龄前小于母鸡，8～9周龄等于母鸡，10～12周龄大于母鸡；④12周龄体尺性状中除胸角性别间差异不显著（P>0.05）、公鸡胫色显著黄于母鸡（P<0.05）外，其他性状均为公鸡极显著大于（红于）母鸡（P<0.01）；⑤12周龄胸角与其它体尺性状表型相关都不显著（P>0.05），其余绝大部分性状间存在显著（P<0.05）或极显著（P<0.01）相关。⑥活重、体斜长、龙骨长、胫长、胫围、冠长、冠高、冠色、胫色、胸角、胸宽的遗传力分别为0.53、0.11、0.64、0.92、0.42、0.16、0.15、0.52、0.25、0.16、0.40。 相似文献
13.
14.
Geórgia Camargo Góss Fabricio Desconsi Mozzaquatro Raphaela Vanhove Lilian Pinto Camargo Gabriela Döwich Pradella Carla Teixeira Leite Etiele Maldonado Gomes Ana Luisa Moreira Carneiro Gabriel Feix Heckler Claudia Acosta Duarte 《Anatomia, histologia, embryologia》2021,50(3):493-499
The physiological measurements of collateral ligaments of distal interphalangeal joint (CL-DIPJ) differ in the literature. The factors that influence these differences are not well described. The aims of this study are to compare CL-DIPJ sizes in equines with different withers height, as well as to correlate body weight and hoof size to the size of these ligaments. In total, 52 horses were used in the study. They were divided into two groups according to wither height: Group 1 (G1) - 21 animals with up to 147 cm - and group 2 (G2) - 21 animals with greater than 148 cm. CL-DIPJ was ultrasonographically measured in order to find the mean of dorso-palmar (DPD) and latero-medial (LMD) diameters and the cross-sectional area (CSA). Hoof width and length were measured, and the results were used to calculate the hoof surface area. Withers height and body weight were also measured. Groups were statistically compared by Student's t test and Pearson's correlation application to each group. Groups were different in body size, HS and CL-DIPJ size when p < .05, except for the LMD of the medial collateral ligament of left thoracic limb. Withers height and body weight did not show significant correlations to CL-DIPJ size in G1, but they had little influence on the size of CL-DIPJ on G2. No correlation between the hoof size and the CL-DIPJ was noted in any of the two groups. In conclusion, the CL-DIPJ were larger in taller horses and their sizes were correlated to their height and weight, but they were not correlated to hoof size. 相似文献
15.
奶牛体温评价指标及测定方法研究进展 总被引：1，自引：0，他引：1
体温是动物重要的基本生理指标,其变化可以灵敏指示机体的健康状况、生理功能和所处环境变化。体温及其变化的准确测定是生产中进行奶牛发情鉴定、疾病诊断和热应激程度评估的重要依据。可用于反映奶牛体温的指标很多,每种指标的测定方法不尽相同,本文总结了血液、鼓膜、腹膜、乳房、牛奶、直肠、阴道、瘤/网胃、体表等部位温度作为奶牛体温评价指标的研究和应用,并结合上述指标的应用现状,阐述了直肠温度、阴道温度、牛奶温度、瘤/网胃温度和体表温度的常见测定方法,以供奶牛生产或相关研究参考。 相似文献
16.
太湖鹅体尺测量及屠宰性能测定 总被引：1，自引：0，他引：1
对70日龄太湖鹅体尺及屠宰性能进行测定,并对相关参数进行相关性分析。结果表明,太湖鹅平均体斜长、龙骨长、胸深、胸宽、胫长、胫围、髋骨宽、半潜水长、颈长分别为26．23cm、12．03cm、10．31cm、9．94cm、8．42cm、4．38cm、6．01cm、49．08cm、35．85cm,除龙骨长、髋骨宽外,其它体尺指标公母间差异显著;平均屠宰率、全净膛率、半净膛率、胸肌率、腿肌率分别为87．84％、69．66％、78．31％、7．35％、18．74％,半净膛率、胸肌率公母间差异极显著（P〈0．01）,全净膛率公母间差异显著（P〈0．05）;体尺各指标间仅有半潜水长和髋骨宽呈负相关,屠宰性能各指标间存在高等或中等强度相关,胸肌重与胫长呈负相关。 相似文献
17.
为挖掘和利用太湖鹅遗传资源,利用太湖保种场核心群对太湖鹅的繁殖性能进行测定,在相同饲养管理条件下比较太湖鹅与四川白鹅、皖西白鹅、豁眼鹅、扬州鹅的肉质特性差异。结果表明:太湖鹅3%开产日龄188d,66周入舍母鹅产蛋76.3个,52周龄蛋重142.7g,种蛋受精率91.2%,受精蛋孵化率90.1%;太湖鹅胸肌肉水分含量与四川白鹅差异显著(P<0.05),与其它品种差异不显著,太湖鹅胸肌剪切力、肉色、系水力、pH值、粗蛋白和粗脂肪含量与其它品种间差异均不显著;太湖鹅肌纤维密度显著大于四川白鹅、豁眼鹅和扬州鹅(P<0.05),但显著小于皖西白鹅(P<0.05);太湖鹅肌纤维直径显著小于其它品种(P<0.05)。研究表明,太湖鹅经过进一步选育可以作为优质肉鹅配套系的理想母本。 相似文献
18.
M.H. Sadek A.Z. Al-Aboud & A.A. Ashmawy 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2006,123(6):369-377
Data of 13 body measurements have been analysed from 166 Arabian horses, 123 mares and 43 stallions, ranging from 49 to 298 months of age, belonging to Alzahraa stud, Cairo, Egypt. General linear model was used to study age and gender effects on these measures. Gender was a significant source of variation for most studied traits, but not for neck girth, cannon bone circumference of fore and hind legs, and pastern girth of fore and hind legs. Age significantly affected pastern girths of fore and hind legs and cannon bone circumference of fore legs, while there was no significant effect on the other measurements. Pearson correlations, adjusted for age effect, between measurements were estimated and ranged from 0.02 to 0.84 for mares and from ?0.05 to 0.90 for stallions. Factor analysis with promax rotation for each gender was carried out to derive fewer independent common factors. Three factors were extracted which accounted for 66% and 67% of the total variance in mares and stallions respectively. The first, second and third factors in mares tended to describe body thickness, leg thickness and general size respectively; whereas in stallions they tended to differentiate among general size, leg thickness and body thickness respectively. The three extracted factors for each gender determine the main sources of shared variability that control body conformation in Arabian horses. These factors could be considered in selection programmes to acquire highly coordinated bodies in pure Arabian horses with fewer measurements. 相似文献
19.
陕西省富平县是全国著名的奶山羊基地县,近年由于商品经济的迅速发展,奶山羊产奶量低,经济效益不高,已远远不能满足农村家庭经济发展的要求,因而出现奶山羊大幅度“滑坡”现象,以致鲜奶供不应求,乳品加工厂奶源严重不足。为了解决奶源问题,富平县于1987年开始用丹麦红牛改良秦川牛,二年来共配2367头,产犊670头。丹秦F_1体型外貌与秦川牛相比,背腰宽广,后躯宽平,乳房大,毛色多呈紫红或红色;其初生重平均为29.69kg,比秦川牛提高49.20％,30、90、180、360日龄体重分别提高43.9、30.6、4.5和23.0％;F_1牛耐粗饲,适应性强,能耐寒、耐热,深受当地群众喜爱。 相似文献
20.
Estimates of genetic parameters were obtained for body measurement traits of 648 animals at 4 months of age, of 545 at 8 months and carcass traits of 14 972 animals with the use of an animal model by the restricted maximum likelihood procedure. The estimated heritabilities for carcass traits were high (0.41 to 0.54). At 4 months the estimated direct heritabilities for body measurement traits were moderate to high (0.28 to 0.64), except for chest width (0.19); at 8 months they were also moderate to high (0.23 to 0.49), except for chest depth and chest width (0.18 and 0.06, respectively). Maternal heritabilities for all body measurement traits were low at both ages. The results indicate that because of their moderate direct genetic correlations with body measurement traits, carcass weight, rib thickness and subcutaneous fat thickness can be improved; however, rib eye area and beef marbling standard show little such possibility considering their correlation with body measurement traits. 相似文献