TABLE 7.
Least squares means1 (SE) for reproductive traits across PRRS2 phases for genotypes at the WUR10000125 and MARC0034894 SNP3 in Duroc and Landrace sows.
| WUR10000125 | MARC0034894 | ||||||
|
|
|
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| Trait4 | AA | AB | P-value | AA | AB | BB | P-value |
| Pre-PRRS phase | |||||||
| Duroc | |||||||
| TNB | 9.62 (0.29) | 9.38 (0.24) | 0.308 | 9.70 (0.35) | 9.50 (0.26) | 9.29 (0.25) | 0.386 |
| NBA | 8.46 (0.28) | 8.22 (0.23) | 0.290 | 8.61 (0.34) | 8.30 (0.25) | 8.10 (0.24) | 0.273 |
| NBD5 | 0.77 (0.05) | 0.79 (0.04) | 0.794 | 0.72 (0.06) | 0.81 (0.05) | 0.80 (0.04) | 0.633 |
| NSB5 | 0.52 (0.05) | 0.53 (0.04) | 0.847 | 0.50 (0.06) | 0.54 (0.04) | 0.53 (0.04) | 0.832 |
| NBM5 | 0.23 (0.04) | 0.24 (0.03) | 0.788 | 0.20 (0.04) | 0.24 (0.03) | 0.25 (0.03) | 0.574 |
| NW | 7.32A(0.22) | 7.05B(0.19) | 0.095 | 7.33 (0.26) | 7.17 (0.20) | 7.06 (0.19) | 0.465 |
| Landrace | |||||||
| TNB | 13.58 (0.30) | 13.31 (0.36) | 0.365 | 13.12 (0.58) | 13.75 (0.30) | 13.48 (0.27) | 0.428 |
| NBA | 12.15 (0.26) | 11.84 (0.31) | 0.236 | 11.71 (0.51) | 12.27 (0.27) | 12.01 (0.24) | 0.393 |
| NBD5 | 1.01 (0.04) | 1.07 (0.05) | 0.508 | 1.03 (0.09) | 1.03 (0.04) | 1.06 (0.04) | 0.949 |
| NSB5 | 0.72 (0.04) | 0.72 (0.05) | 0.899 | 0.73 (0.08) | 0.70 (0.04) | 0.73 (0.03) | 0.934 |
| NBM5 | 0.27 (0.03) | 0.32 (0.04) | 0.189 | 0.27 (0.06) | 0.30 (0.03) | 0.30 (0.03) | 0.918 |
| NW | 9.61a(0.20) | 9.23b(0.24) | 0.037 | 8.96b(0.37) | 9.80a(0.21) | 9.50ab(0.18) | 0.033 |
| PRRS phase | |||||||
| Duroc | |||||||
| TNB | 8.73 (0.37) | 8.72 (0.29) | 0.969 | 8.99 (0.47) | 8.76 (0.32) | 8.42 (0.32) | 0.372 |
| NBA | 5.49 (0.37) | 5.44 (0.30) | 0.861 | 5.35 (0.48) | 5.56 (0.32) | 5.49 (0.32) | 0.898 |
| NBD5 | 1.91 (0.08) | 2.02 (0.07) | 0.613 | 2.04 (0.11) | 2.01 (0.07) | 1.84 (0.07) | 0.654 |
| NSB5 | 0.65 (0.06) | 0.76 (0.05) | 0.266 | 0.65 (0.08) | 0.70 (0.05) | 0.77 (0.05) | 0.624 |
| NBM5 | 1.21 (0.08) | 1.18 (0.06) | 0.826 | 1.43 (0.10) | 1.16 (0.07) | 1.02 (0.07) | 0.184 |
| NW | 3.68 (0.40) | 3.68 (0.32) | 0.990 | 3.79 (0.48) | 3.56 (0.35) | 3.69 (0.36) | 0.837 |
| Landrace | |||||||
| TNB | 12.51 (0.34) | 12.24 (0.41) | 0.484 | 11.74b(0.72) | 12.27b(0.36) | 13.12a(0.29) | 0.033 |
| NBA | 7.69 (0.40) | 7.38 (0.48) | 0.507 | 8.26A(0.83) | 6.75B(0.41) | 7.60A(0.34) | 0.077 |
| NBD5 | 3.16 (0.07) | 3.17 (0.09) | 0.980 | 2.29B(0.15) | 3.61AB(0.07) | 3.76A(0.06) | 0.055 |
| NSB5 | 1.02 (0.05) | 1.00 (0.07) | 0.870 | 0.87 (0.11) | 1.05 (0.06) | 1.11 (0.05) | 0.571 |
| NBM5 | 1.82 (0.07) | 1.84 (0.09) | 0.945 | 1.16b(0.16) | 2.14ab(0.08) | 2.33a(0.06) | 0.027 |
| NW | 5.11 (0.33) | 4.89 (0.41) | 0.562 | 5.60 (0.67) | 4.44 (0.35) | 4.96 (0.30) | 0.158 |
| Post-PRRS phase | |||||||
| Duroc | |||||||
| TNB | 8.95 (0.25) | 8.93 (0.18) | 0.946 | 9.58a(0.35) | 8.70ab(0.21) | 8.54b(0.20) | 0.023 |
| NBA | 8.00 (0.23) | 7.99 (0.17) | 0.969 | 8.70a(0.32) | 7.74ab(0.20) | 7.53b(0.19) | 0.003 |
| NBD5 | 0.63 (0.04) | 0.65 (0.03) | 0.784 | 0.62 (0.06) | 0.66 (0.03) | 0.64 (0.03) | 0.900 |
| NSB5 | 0.45 (0.03) | 0.44 (0.03) | 0.770 | 0.41 (0.05) | 0.46 (0.03) | 0.46 (0.03) | 0.733 |
| NBM5 | 0.16 (0.03) | 0.19 (0.02) | 0.363 | 0.21 (0.04) | 0.17 (0.02) | 0.16 (0.02) | 0.688 |
| NW | 6.80 (0.27) | 6.72 (0.22) | 0.740 | 7.29A(0.35) | 6.51AB(0.23) | 6.47B(0.23) | 0.055 |
| Landrace | |||||||
| TNB | 13.73 (0.24) | 13.63 (0.29) | 0.745 | 13.86 (0.51) | 13.38 (0.25) | 13.79 (0.20) | 0.312 |
| NBA | 12.46 (0.23) | 12.34 (0.27) | 0.656 | 12.63 (0.47) | 12.10 (0.24) | 12.45 (0.20) | 0.302 |
| NBD5 | 0.87 (0.04) | 0.84 (0.04) | 0.771 | 0.82 (0.08) | 0.86 (0.04) | 0.89 (0.03) | 0.833 |
| NSB5 | 0.53 (0.03) | 0.53 (0.04) | 0.977 | 0.53 (0.07) | 0.52 (0.03) | 0.54 (0.03) | 0.945 |
| NBM5 | 0.29 (0.02) | 0.29 (0.03) | 0.953 | 0.24 (0.05) | 0.31 (0.03) | 0.32 (0.02) | 0.599 |
| NW | 9.95 (0.23) | 9.85 (0.26) | 0.710 | 10.24 (0.44) | 9.84 (0.23) | 9.63 (0.20) | 0.371 |
1Expressed as number of piglets;
2Porcine Reproductive and Respiratory Syndrome (PRRS);
3SNPs are located on Sus scrofa chromosome 7 according to the Sscrofa 11.1 as follow: (GCA_000003025.6) assembly: WUR10000125/rs80800372 (4:127,441,677) and MARC0034894/rs80841011 (1:28,912,680). Frequencies of the A and B alleles for the WUR10000125 SNP were 0.51 and 0.49, respectively, for Duroc, and 0.81 and 0.19, respectively, for Landrace, while for the MARC0034894 SNP were 0.31 and 0.69, respectively, for Duroc, and 0.25 and 0.75, respectively, for Landrace for the PRRS-phase;
4TNB, total number of piglets born; NBA, number of piglets born alive; NBD, number of piglets born dead; NSB, number of stillborn piglets; NBM, number of mummified piglets; NW, number of piglets weaned;
5Results were back-transformed from ln(phenotype+1);
a,bMeans lacking the same superscript indicate differences at P-value < 0.05 between genotypes with an SNP;
A,BMeans lacking the same superscript indicate differences at P-value < 0.10 between genotypes with an SNP.