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山东省农科院畜牧所良种猪技术研究中心1998年10月从法国引进大约克原种猪,经过三年多的饲养、观察和选育,发现该品种猪具有适应性强,体质较粗壮,蹄质坚实,产仔数多,泌乳力强,胴体瘦肉率高等特点。现将法系大约克猪的生产性能测定结果报告如下。1材料与方法1.1测定猪的选择选择2000年春季产仔的法系大约克猪37窝,2000年秋季产仔的34窝和2001年春季产仔的42窝,统计母猪的繁殖性能;选择血统一致、体重相近、发育良好的健康生长猪进行生长肥育性能和胴体性状的测定。1.2测定性状母猪的繁殖性状、生长猪肥育性能和胴体性状。1.2.1母猪繁殖性状。… 相似文献
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利用GWAS研究母猪繁殖性状的进展 总被引：1，自引：0，他引：1
母猪繁殖性状一直是猪的重要性状之一,母猪繁殖性能的高低关乎着养猪场的规模和养猪业的发展。目前利用GWAS(全基因组关联分析)发现影响母猪产仔数、初生重、断奶重和乳头数等繁殖性状的SNP(单核苷酸多态性)位点,进而发现关联的基因已经成为研究热点之一,并且利用GWAS研究母猪的繁殖性状取得了一定的进展。因此,文章主要对利用GWAS研究母猪繁殖性状的进展进行概述。 相似文献
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中国瘦肉型猪母本新品系（DVI号系）的选育，是国家“七五”、“八五”的攻关课题之一，在选育的性状中提高繁殖性能是其重点。内蒙古乌海市种猪场1992年底从北京农林科学院畜牧兽医研究所引人DVI号系原种猪。1993年～1996年向宁县及内蒙西部区提供优良种猪1000余头。为使用户场家全面了解DVI号系种猪的繁殖性能，本文根据我场引入DVI号系种猪以来的产仔、哺育记录，进行统计分析，探讨DVI号系种猪的繁殖性能，为推广和发展DVI号系种猪提供参考资料。1．观羹内容及词养方法：1．l各胎次母猪的总产仔数、产活仔数、初生窝重、平均初… 相似文献
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1品种、年龄
有些猪品种自身的繁殖能力低,造成产仔数少.如皮特兰、杜洛克等,由于品种的原因,提高产仔数非常困难.在商品猪生产的母系选育过程中,不能只注重猪种的体形和瘦肉率,而忽视其繁殖能力.要尽量避免使用有产仔数少的品种血缘的母猪.
猪的年龄及胎次可影响产仔数的多少,同时影响产活仔数的多少.怀1～2胎的母猪繁殖性能低,排,卵数少,产仔数少;怀3～5胎的母猪繁殖性能较好,产仔数及产活仔数较高;怀6胎以上的母猪繁殖性能有所下降,产仔数及产活仔数下降,且由于体力的影响,产仔过程易疲劳,时间过长,造成死胎比例过大.在生产中,应充分发挥3～5胎母猪的繁殖性能,加强低胎次和高胎次母猪的助产,减少产仔的间隔时间. 相似文献
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本文统计分析了屯昌母猪、大屯母猪（大约克夏猪×屯昌猪）和长屯母猪（长白猪×屯昌猪）共135头母猪的繁殖性能。结果表明,在母猪的繁殖生理方面,屯昌母猪的初次发情及适配日龄均早于其杂交后代母猪,但平均妊娠天数稍高于杂交后代母猪;在两个杂交后代母猪中,长屯猪的初次发情及适配日龄又早于大屯猪。在母猪的繁殖性能方面,屯昌母猪的平均窝产仔数为12.6头,比大屯和长屯母猪的产仔数分别高12.5%和8.62%。3种母猪相比,窝产仔数、窝产活仔数均以屯昌母猪最高,而长屯母猪的繁殖性能要好于大屯母猪;初生窝重则杂交母猪后代明显好于屯昌母猪的后代,并且窝产仔数越多,初生重越小。 相似文献
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川藏黑猪高繁殖力新品系繁殖性能世代选育试验 总被引：1，自引：0，他引：1
为了探明川藏黑猪高繁殖力新品系(F01系)的繁殖性能,对F01系04世代母猪的繁殖性能进行统计分析。结果显示:F01系产仔数和活仔数均比较高,04世代母猪的繁殖性能进行统计分析。结果显示:F01系产仔数和活仔数均比较高,04各世代初产产仔数均在10头以上,经产产仔数12头以上,第4世代初产、经产产仔数分别为11.19、12.37头,产仔数和产活仔数随着世代选育逐步提高;新品系的发情周期为21.26 d,持续期为4 d,妊娠期为114.21 d。数据分析结果,F01系经过5世代继代选育后,产仔数和产活仔数的繁殖性状已趋于稳定,是一个理想的母系种猪。 相似文献
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撒坝猪乳头数遗传力及其与繁殖性能关系的研究 总被引：4，自引：0，他引：4
本研究对 4个世代共 577头撒坝猪的乳头数进行了分析 ,并用HARVEY程序对乳头数的遗传力进行了估计 ,同时利用 1 2 8头有繁殖性能记录的母猪资料对乳头数与繁殖性状的关系进行了分析。结果表明 ,各世代的乳头数存在着显著差异 ,且逐代均有显著提高 ;乳头数的遗传力为 0 .331 ;乳头数与总产仔数和活产仔数间遗传相关和表型相关均为负值 ,与初生窝重、2 0日窝重、断奶仔数和断奶窝重间则存在着正的遗传相关和表型相关 ;乳头数与所有繁殖性状的环境相关都较弱 ( -0 .0 0 2～ 0 .0 94 ) 相似文献
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To determine the effectiveness of a single injection of vitamin A to increase litter size, 1,375 sows were assigned randomly to 11 treatment groups (125 sows per treatment). Treatments included injection of 1 x 10(6) IU of vitamin A dissolved in corn oil at weaning or on d 0, 2, 6, 10, 13, 19, 30, 70, or 110 after breeding. Sows in the control group were injected with corn oil on corresponding days. A total of 396 sows were removed from the study following treatment or treatment assignment. Therefore, farrowing data were collected for 979 sows. Injection of vitamin A did not influence (P > . 10) total litter size, live litter size, litter weight, pig weight, number of runts, or number of mummies. Mean live litter size was 10.1 +/- .1 for all sows that farrowed in the experiment. Parity group affected total litter size, live litter size, live litter weight, and number stillborn (P < .01) but not pig weight, number of runts, number of mummies, or gestation length (P > . 10). In this study, a single injection of vitamin A at any time from weaning to farrowing did not increase litter size in sows. 相似文献
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旨在研究VRTN（vertebrae development homolog）基因在巴马香猪群体中的编码区序列特征、组织表达情况、脊椎数性状因果突变位点ins291的等位基因频率及其与乳头数和产仔数性状的关联。本研究采集3头0日龄巴马香猪组织,利用cDNA克隆技术获得VRTN基因编码区全长序列并进行生物信息学分析,利用荧光定量PCR技术检测VRTN在心、肝、脾、肺、肾、背最长肌和皮下脂肪组织中的表达情况;采集279头经产巴马香猪母猪血液,检测ins291位点在该群体中的频率分布,并与乳头数、产仔数性状进行关联分析。结果表明,巴马香猪VRTN基因编码区全长2 097 bp,其编码的氨基酸序列在不同物种间存在大量保守区域;VRTN基因编码698个氨基酸,预测为亲水性蛋白质,存在1个螺旋转角螺旋域超家族结构功能区、2个低复杂度区域和2个内部重复结构,并与核受体辅抑制子1（NR6A1）、果蝇同源框基因Prospero的脊椎动物同源蛋白2（PROX2）和富亮氨酸重复序列74亚基（LRRC74A）等蛋白具有相互作用;VRTN基因在0日龄巴马香猪各组织中均有表达,其中在背最长肌组织中表达量最高;巴马香猪保种群体中VRTN基因有利突变位点ins291的等位基因频率为21.15%,不同基因型个体之间平均产仔数、总乳头数、左侧乳头数、右侧乳头数和单侧最大乳头数性状均无显著差异（P>0.05）,但纯合突变型（ins/ins）个体的乳头数性状均高于其他基因型个体。结果提示,在巴马香猪产业化生产中可通过分子育种手段提高VRTN ins291有利等位基因频率,但不影响其产仔数性状。 相似文献
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《中国畜牧杂志》2019,(2)
为探究胎次对母猪产弱仔、死胎的影响,实验对广西某猪场2015年12月——2017年11月的8 028窝大白母猪的胎次和产弱仔数、死胎数进行统计分析。结果表明:不同胎次母猪产弱仔数和死胎数具有极显著差异(P<0.01),其中第1胎次母猪弱仔数显著高于其他胎次母猪(P<0.05),且弱仔数均值呈逐渐下降趋势;第5胎次母猪的死胎数显著低于其他胎次(P<0.05),且死胎数均值近似呈先下降后上升的趋势;对产弱仔数和死胎数占总产仔数的比例进行分析进一步证明了上述结果。综上,第2～6胎次母猪产弱仔数和死胎数都相对较少,产仔性能最好,规模化猪场可以考虑淘汰7胎以上的母猪;对第1胎次的母猪建设P1场(第1胎次母猪场),制定更为严格的"驯化"和饲养工作。 相似文献
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Martínez-Giner M Noguera JL Balcells I Alves E Varona L Pena RN 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2011,128(5):344-353
Teat number is an important trait in sows that should accompany the increase in litter size that has been achieved in the last decades through selection. We have previously identified a genome-wide significant QTL for teat number in porcine chromosome SSC5 by means of an experimental Meishan by Iberian F(2) intercross population. In the present report, we have studied the porcine parathyroid hormone-like hormone (PTHLH) gene, which maps to SSC5, as a candidate gene for this trait, as PTHLH is involved in nipple formation during embryogenesis and nipple development during pregnancy and lactation. We have found that porcine PTHLH gene is transcribed into three mRNA species differing in the 5'UTR region. Two of these variants are reported in pigs here for the first time: one was similar to variant 1 described in humans while the other, which was generated by the retention of two small introns, has not been identified before in any other species. In addition, mRNA expression profile for two of the mRNA variants was assessed in 19 pig tissues. Porcine PTHLH showed a widespread expression as it was present in all tested tissues and relative expression of each variant was tissue dependent. Finally, we have performed an association study between a non-synonymous mutation in the coding region of this gene and sow teat number. The PTHLH polymorphism was segregating in our Meishan by Iberian F(2) population at intermediate allelic frequencies. We compared here six different statistical models to choose the one with a better fit and a lower degree of complexity. However, despite the potential negative effect of the PTHLH mutation in the signal peptide of this protein, we did not detect any association between the PTHLH genotype and the sow teat number phenotype, concluding that the causal mutation of the observed QTL is very likely not related to this gene. 相似文献
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试验旨在研究催乳素受体（prolactin receptor,PRLR）和卵泡刺激素β（follicle-stimulating hormone β,FSHβ）基因的多态性及其与母猪繁殖性状的关联分析。采用PCR-RFLP方法对大白猪、杜洛克猪和长白猪3个猪种共487头母猪进行了PRLR和FSHβ基因多态性检验,并采用单因子方差分析、LSD法分析不同基因型与母猪总产仔数、产活仔数、断奶窝重和断奶窝仔数等繁殖性状的相关性。结果表明,PRLR基因在大白猪和长白猪中B等位基因均为优势基因,基因频率分别为0.717和0.548,大白猪BB基因型总产仔数显著高于AA基因型（P<0.05）,长白猪BB基因型断奶窝重显著高于AB基因型（P<0.05）;FSHβ基因在大白猪、杜洛克猪和长白猪3个猪种中B等位基因均为优势基因,基因频率分别为0.804、0.760和0.789,长白猪BB基因型总产仔数和产活仔数均显著高于AB基因型（P<0.05）,呈现BB>AA>AB趋势。因此,PRLR和FSHβ基因对荣昌猪场母猪繁殖性能有一定影响,可作为母猪繁殖性能分子选育的候选参考基因。 相似文献
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以华南某1 500头规模种猪场2009年到2010年1 502窝长白猪分娩信息进行优化、选配减少近交畸形的研究,结果显示血缘选配优化时将近交系数控制在1%比3%效果明显,平均产活仔数从10.39头/窝提高到10.46头/窝(P＞0.05),畸形率从10.30%下降到4.79%(P＜0.01);对其中402窝出现畸形仔猪... 相似文献
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为了解台系杜洛克母猪重复力遗传参数在国内的适应性,充实完善台系杜洛克猪产仔数的重复力,继续选育提高杜洛克猪育种水平及经济效益。通过采用组内相关的方法,对某大型种猪企业的台系杜洛克猪1~8胎次产仔数的重复力进行估测。结果表明:台系杜洛克猪1~8胎次的平均产仔数分别为8.6头、9.65头、9.35头、9.00头、8.30头、8.80头、7.65头;台系杜洛克猪8个胎次平均产仔数为8.44头;台系杜洛克猪产仔数的重复力为0.42。 相似文献
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Marianna Norring Anna Valros Lene Munksgaard Maarit Puumala Kim O. Kaustell Hannu Saloniemi 《Acta Agriculturae Scandinavica, Section A - Animal Sciences》2013,63(3-4):148-154
Abstract The aim of the study was to investigate lesions in sows and their piglets kept on two flooring materials – bare concrete and concrete coated with polyurethane containing sand. In total, 13 lactations on concrete and 11 on polyurethane were evaluated. The severity of skin lesions was scored and teat and claw lesions were recorded. The sand-filled coating was rougher compared to the concrete floor. Larger litter sizes were associated with a higher proportion of wounded teats in sows. Only seven of the 230 piglets had no skin lesions. The piglet skin lesions generally healed, since the number of more severe lesions decreased (p<0.001) and the number of less severe lesions (p<0.001) increased over time. Piglet lesions were associated with daily weight gain and litter size. The number of skin lesions on sows and piglets did not differ between animals kept on concrete and polyurethane-covered flooring. However, piglets kept on the latter flooring had more frequent claw lesions. On both types of flooring the majority of the piglets had skin lesions. Piglets had more claw lesions on polyurethane coating due to its roughness. In addition to the possibility of lower weight gains in piglets due to severe lesions, pig skin lesions are themselves a severe welfare problem in this type of housing system. 相似文献