Number of ovulations in culled Landrace × Yorkshire gilts in the tropicsassociated with age, body weight and growth rate

Journal of Veterinary Medical Science

Padet TUMMARUK¹  Sawang KESDANGSAKONWUT² 

[1] Department of Obstetrics, Gynaecology and Reproduction, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand;Department of Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand

关键词: corpora lutea;    ovary;    puberty;    reproduction;    swine;   

DOI  :  10.1292/jvms.13-0496

学科分类：兽医学

来源: Japanese Society of Veterinary Science

【 摘 要 】

References(25)Cited-By(1)The objective of the present study was to determine the number of ovulations in culledLandrace × Yorkshire (LY) crossbred gilts in the tropics associated with age, body weightand growth rate. The genital organs from 316 gilts were examined for gross abnormalities,and those with normal cyclic ovaries (n=155, 307 ± 4.1 days of age, 148 ± 1.6 kg bodyweight) were included in the analyses. Number of ovulations was defined by a count of thecorpora lutea (CL) from both ovaries. On average, the number of ovulations in LY gilts was15.9 ± 0.3 (range 4 to 27). The number of ovulations correlated with the body weight(r=0.31, P<0.001) and growth rate (r=0.20, P=0.015)of the gilts, but not with their age (P>0.05). Gilts with a bodyweight of 141 to 150 kg (17.0 CL, n=31) ovulated more than those with a body weight �?130kg (14.1 CL, P=0.014, n=23). In conclusion, both the body weight andgrowth rate of the gilts were significantly correlated with the number of ovulations. Themaximum number of ovulations was found in gilts at a body weight of above 141 kg.

【 授权许可】

Unknown