皖系粗毛兔超数排卵及胚胎移植的研究

采用国产激素,以ＦＳＨ＋ ＬＨ、ＦＳＨ＋ ＨＣＧ、ＰＭＳＧ＋ ＬＨ、ＰＭＳＧ＋ ＨＣＧ ４种不同的处理方法对３２ 只皖系粗毛兔进行超排处理,旨在筛选确立皖系粗毛兔最有效的超排方法及胚胎移植的最佳时期。结果表明：４种超排方法处理后的排卵数分别为４２．５０枚、４６．２５ 枚、３０．６３ 枚、３３．３８ 枚;回收胚胎数分别为２７．６３ 枚、３１．２５ 枚、２２．３７ 枚、２０．７５ 枚;有效胚胎数分别为２０．５０ 枚、２４．１３枚、１７．６３枚、１５．２５枚。这３ 项指标均以ＦＳＨ＋ ＨＣＧ组最高。将收集到的２３７枚胚胎移植给２４只受体,每只受体移植胚胎１０枚左右。结果表明：２－ ,４－ ,８－ １６ 细胞期及桑椹胚移植后的妊娠率、产仔率及窝产活仔数分别为５０％ 、１６．６％ 和３．３ 只,６６．７％ 、２０．６％ 和３只,６０％ 、２４．５％ 和４．３ 只,７１％ 、４０．９％ 和５．４只。其中以桑椹胚组指标最高     

沂蒙巨型长毛兔品系选育研究

以德系长毛兔为母本,先导入哈白兔血液,再迁入浙系兔、法系兔基因,从５０００余只杂种后代中选择３６０只优秀个体（公母比为１∶５）组建育种核心基础群,经５个世代的系统选育,培育出产毛量高、粗毛率高、繁殖力强、适应性好、体型大的粗毛型长毛兔新品系。该品系核心群的主要性能指标为：成年体重公兔５１２０ｇ、母兔５３８５ｇ,窝产活仔数７．４３只,年产毛量１８３０ｇ,粗毛率１８．２０％,料毛比４２．５∶１,毛纤维品质优良。研究过程中共推广良种长毛兔２５４．７７万只,杂交改良兔３０６．２８万只,累计创造经济效益达１３７８４．９７万元。     

乔科羊羊毛品质初步分析

对甘南州乔科羊育种和发展中心的本品种选育群中的乔科羊随机采取毛样,在实验室进行羊毛物理性能测定,测定结果表明:(1)乔科羊不同类型羊毛的毛强度、细度和长度差异显著(P<0.01);(2)乔科羊不同类型羊毛伸度差异不显著(P>0.05);(3)乔科羊被毛中干死毛含量较高。     

影响多胎细毛羊主要经济性状的非遗传因素分析

为探索非遗传因素对细毛羊主要经济性状的影响,本文对新疆科创畜牧繁育中心2009—2017年的鉴定记录进行统计分析,利用最小二乘方差分析鉴定年份、年龄及性别3个非遗传因素对多胎细毛羊头部评分、体型评分、密度评分、细度评分、匀度评分、弯曲度评分、油汗评分、总评分8个主观鉴定性状和羊毛长度、剪毛后体重、剪毛量3个客观测定性状的影响。结果表明:鉴定年份对各性状均有极显著影响;性别对密度评分、毛长度、匀度评分、油汗评分、总评分、剪毛后体重、剪毛量均有极显著影响,对头部评分、体型评分、细度评分、弯曲评分的影响均不显著。年龄对细度评分有极显著影响,对头部评分、剪毛量有显著影响,对其他性状的影响均不显著。     

Metal ion adsorbability of electrospun wool keratose/silk fibroin blend nanofiber mats

In this study, electrospun wool keratose (WK)/silk fibroin (SF) blend nanofiber was prepared and evaluated as a heavy metal ion adsorbent which can be used in water purification field. The WK, which was a soluble fraction of oxidized wool keratin fiber, was blended with SF in formic acid. The electrospinnability was greatly improved with an increase of SF content. The structure and properties of WK/SF blend nanofibers were investigated by SEM, FTIR, DMTA and tensile test. Among various WK/SF blend ratios, 50/50 blend nanofiber showed an excellent mechanical property. It might be due to some physical interaction between SF and WK molecules although FTIR result did not show any evidence of molecular miscibility. As a result of metal ion adsorption test, WK/SF blend nanofiber mats exhibited high Cu²⁺ adsorption capacity compared with ordinary wool sliver at pH 8.5. It might be due to large specific surface area of nanofiber mat as well as numerous functional groups of WK. Consequently, the WK/SF blend nanofiber mats can be a promising candidate as metal ion adsorption filter.     

优秀湖羊种公羊被毛特性的研究

对湖羊优秀种公羊与一般种公羊的被毛特性进行羊毛学分析。结果表明:不同种用价值的公羊在毛纤维类型、无髓毛/有髓毛比值,以及羊毛强度等指标均存在明显差异;毛样经氨基酸分析显示,不同种用价值的公羊与其羊毛中各种氨基酸含量无显著关系。     

增毛添加剂对毛用生长幼兔产毛量的影响

经77天的饲养试验,表明增毛添加剂以每日每头1克的剂量可使试验组毛用兔平均每头产毛量比对照组多37.76%(P<0.01),效果十分显着。     

羊毛生长的内分泌调节研究进展

本文综述了GH、IGF、T3 、T4、PRL、褪黑激素、EGF、肾上腺皮质激素等激素对羊毛生长影响的研究进展 ,并对一些激素对羊毛生长的作用机制进行了分析。     

Divergent selection for total fleece weight in Angora rabbits: Correlated responses in wool characteristics

An experiment was carried out to study direct and indirect responses to selection in the Angora rabbit. There were two selection lines, one selected for high fleece weight and the other for low fleece weight. Data from 669 female rabbits born in 1994–2001 and having produced a total of 2923 harvest of wool were analysed to quantify the correlated responses to selection. By 2001, there had been eight cohorts of selection. The correlated responses analysed included compression, resilience, fleece quality traits (bristle and down length, average fibre diameter, comfort factor, bristle diameter) and secondary to primary follicle ratio (S/P). Genetic correlations were obtained by restricted maximum likelihood techniques. In response to selection, a positive difference of 0.92, 0.21 and 0.55 genetic standard deviation were observed for bristle length, comfort factor and S/P, respectively. No correlated response was observed on down length while negative differences of 1.00, 1.31, 0.38 and 0.50 genetic standard deviations were observed for compression, resilience, bristle diameter and average fibre diameter, respectively. Selection for increasing total fleece weight results in an increase of qualitative component traits of wool production in the French Angora rabbit. The quantitative traits were examined in the first (published) part of the paper.     

皖系粗毛兔血浆酶活性及其与产毛量相关的研究

对49只1岁龄皖系粗毛兔进行产毛量和血浆中碱性磷酸酶、谷丙转氨酶、谷草转氨酶活性的测定.结果表明,皖系粗毛兔1岁时血浆碱性磷酸酶活性与产毛量之间呈显著的正相关(P＜0.05);血浆中谷丙转氨酶和谷草转氨酶活性与产毛量之间的相关均不显著(P＞0.05).