Ogawa Shinichiro, Konta Ayane, Kimata Makoto, Ishii Kazuo, Uemoto Yoshinobu, Satoh Masahiro
Graduate School of Agricultural Science, Tohoku University, Sendai, Japan.
Faculty of Agriculture, Tohoku University, Sendai, Japan.
Anim Sci J. 2019 Jan;90(1):23-28. doi: 10.1111/asj.13120. Epub 2018 Oct 28.
Genetic parameters were estimated for six reproductive traits related to farrowing events in Landrace and Large White pigs; total number born (TNB), number born alive (NBA), number stillborn (NSB), total litter weight at birth (LWB), mean litter weight at birth (MWB), and gestation length (GL). We analyzed 62,534 farrowing records for 10,637 Landrace dams and 49,817 farrowing records for 8,649 Large White dams. Estimated heritabilities of TNB, NBA, NSB, LWB, MWB, and GL by single-trait repeatability model analyses were 0.12, 0.12, 0.08, 0.18, 0.19, and 0.29, respectively, in Landrace, and 0.12, 0.10, 0.08, 0.18, 0.16, and 0.34, respectively, in Large White. Genetic correlation between NBA and NSB was unfavorable: 0.20 in Landrace and 0.33 in Large White. Genetic correlations of GL with the other five traits were weak: from -0.18 with NSB to -0.03 with NBA in Landrace, and from -0.22 with NSB to -0.07 with NBA in Large White. LWB had a highly favorable genetic correlation with NBA (0.74 in both breeds), indicating the possibility of using LWB for the genetic improvement of NBA.
对长白猪和大白猪与产仔事件相关的六个繁殖性状进行了遗传参数估计；总产仔数（TNB）、活产仔数（NBA）、死产仔数（NSB）、出生时总窝重（LWB）、出生时平均窝重（MWB）和妊娠期长度（GL）。我们分析了10,637头长白母猪的62,534条产仔记录以及8,649头大白母猪的49,817条产仔记录。通过单性状重复性模型分析，长白猪中TNB、NBA、NSB、LWB、MWB和GL的估计遗传力分别为0.12、0.12、0.08、0.18、0.19和0.29，大白猪中分别为0.12、0.10、0.08、0.18、0.16和0.34。NBA与NSB之间的遗传相关性不利：长白猪中为0.20，大白猪中为0.33。GL与其他五个性状的遗传相关性较弱：长白猪中从与NSB的-0.18到与NBA的-0.03，大白猪中从与NSB的-0.22到与NBA的-0.07。LWB与NBA具有高度有利的遗传相关性（两个品种均为0.74），表明有可能利用LWB对NBA进行遗传改良。
