litter size

Estimation of Phenotypic and Genetic Parameters for Litter Size in Pigs

猪窝产仔数的表型和遗传参数估计

The results of fitness test indicated that additive-dominant genetic model was adequate for litter size.

适合性检验结果表明,窝产仔数符合加性 — 显性遗传模式.

The purpose of this paper is to find genetic markers affecting litter size with modern molecular biotechnology, thus to provide some bases for using marker assisted selection ( MAS) to develop pig breeds or lines with high reproductive efficiency.

本项研究目的就是利用现代分子技术寻找影响猪产仔数的标记基因座，为应用标记辅助选择培育高繁殖率猪的品种或品系提供依据。

The affinity of reproductive performances, namely litter size, alive-litter size, pigs at weaning, individual weaning weight and litter weight at weaning of Landrace, Harbin White and Black Pied were compared.

本文对长白猪、哈白猪、黑花猪三品种的产仔数、产活数、成活数、断奶重、断奶窝重等繁殖性状进行了配合力的测定。

Litter Size and Related Life History Characteristics in Rodents

啮齿动物胎仔数与生活史变量的关系

The freezing extender and thawing solution and the operation procedure, were made, survival rate was 0. 5, conception rate was 70. 59% for one estrous cycle, litter size was 8. 34-9. 73.

研制优选出的冷冻、解冻稀释保护液及成套冷冻技术操作程序、其冻精活率0.5左右、情期受胎率70.59%，窝产仔8.34～9.73头。

In the breeding, selection of the combined genotype AAAA will further improve the litter size of Laiwu black pigs.

在育种实践中，选择AAAA合并基因型可进一步提高莱芜黑猪的繁殖性能。

Pig is prolific livestock. The average litter size of the pluriparous sows is about 10-11.

猪是多产家畜, 经产母猪平均产仔数可达10～11头.

Polymorphism of BMPR-IB gene and its relationship to litter size and growth and development in Chinese Merino meat-Prolificacy strain

绵羊BMP-RIB基因多态性及其与中国美利奴肉用多胎品系产羔数和生长发育的相关性

The differences of LSM for litter size of KK, KL and LL were nonsignificant ( P> 0.05) in Small Tail Han sheep.

小尾寒羊KK、KL和LL基因型之间产羔数的最小二乘均值差异均不显著（P>0.05）。

Through conversion, the heritability estimates of litter size and live-litter size for three continous birthes are 0.35 and 0.36 in proper order, they are near high heritability.

经换算，连续三胎产仔数及活仔数的n次遗传力值分别为0.35及0.36，接近于高遗传力。

Effect of Different Months on Litter Size and Live Piglet Percent of Sows

不同月份对母猪产仔及活仔率的影响

The total pregnant rate of the three years was 29.2%. The mean litter size was 5.13 ± 0.12.The mean nest size was 4.33 ± 0.27.The fecundity of the voles'increased with the increase of age.

3年合计总怀孕率为29.2%.平均胎仔数（x±SE）为5.13±0.12只，平均窝仔数4.60±0.27只，雌鼠和雄鼠的繁殖强度随年龄增长而递增。

The average birth weight of piglets is negatively related to the litter size.

窝仔数与平均出生重负相关.

Breeding period to the islands on the litter size.

繁殖时期到海岛上产仔.

ESR gene had no significant effects on litter size traits in this analysis.

ESR基因与头胎产仔数性状的关联分析未达显著水平。

Effect of gene Bcu ⅰ polymorphism of bone morphogenetic protein-15 on the litter size of pigs

骨形成蛋白15基因BcuⅠ多态性对猪产仔性能的影响

Effects of ob Gene on Litter Size in Sw in e

ob基因对猪产仔数遗传效应的研究

Crossbred Duroc was not better than pure ones for litter size at birth.

系间杂交公猪所配母猪的产仔数也与纯系所配母猪的产仔数相近.