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首页> 外文会议>Conference of the Association of the Advancement of Animal Breeding and Genetics >GENETIC CORRELATIONS BETWEEN JUVENILE INSULIN-LIKE GROWTH FACTOR- I (IGF-I) AND MEASURES OF SOW REPRODUCTIVE PERFORMANCE ARE LOW
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GENETIC CORRELATIONS BETWEEN JUVENILE INSULIN-LIKE GROWTH FACTOR- I (IGF-I) AND MEASURES OF SOW REPRODUCTIVE PERFORMANCE ARE LOW

机译：幼年胰岛素样生长因子 - I（IGF-1）之间的遗传相关性和播种性能的播种措施较低

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Sow reproductive data (N=9 652 sows) and records on juvenile insulin-like growth factor 1 (IGF-I: N=23 730 records) were used to estimate genetic correlations between IGF-I and age at first farrowing (AFF), the total number of litters produced prior to culling (TNL), weaning to conception interval between the first and second parity (WCI_12), and number born alive (NBA_(1-3)) or average piglet birth weights (ABWT_(1-3)) recorded in parities one to three. Heritability estimates (h~2+-S.E.) were moderate (0.26±0.02) for IGF-I, but considerably lower (range:0.03+-0.01 to 0.15+-0.04) for sow reproductive traits. Estimates of genetic correlations between IGF-1 and most sow reproductive traits were generally low (range: -0.08 to +0.08), did not differ significantly from zero, and were accompanied by negligible phenotypic correlations. The exceptions were either unfavourable genetic (rg) and/or phenotypic (r_p) correlations between IGF-I and AFF (r_g: -0.15±0.10, r_p: -0.06±0.02) or WCIn (r_g: -0.45+-0.15, r_p: 0.01+-0.03). Genetic correlations between IGF-I and NBA or ABWT were low and favourable in parities one and two, unfavourable in parity three, but not significantly different from zero in all cases. In a multiple trait context, selection for improved efficiency of lean meat production using information provided by juvenile IGF-I is unlikely to result in significant unfavourable correlated responses in sow reproductive performance.
机译：母猪繁殖的数据（N = 9 652母猪）和少年记录胰岛素样生长因子1（IGF-I：N = 23个730记录）被用来在第一产仔（AFF）来估计IGF-I和年龄之间的遗传相关性，窝的总数产生的剔除（TNL），断奶受孕间隔中的第一和第二奇偶校验（WCI_12）之间之前，和出生数活着（NBA_（1-3））或仔猪平均出生体重（ABWT_（1-3 ））记录在平价一到三个。 （H〜2 + -S.E）遗传力估计是中等（0.26±0.02）为IGF-I，但显着较低（范围：0.03±0.01至0.15±0.04），用于母猪繁殖性状。 IGF-1和最母猪繁殖性状之间的遗传相关的估计数通常较低（范围：-0.08到0.08），没有从零显著不同，伴随着可忽略的表型相关。例外情况是IGF-I和AFF（r_g：-0.15±0.10，R_P：-0.06±0.02）之间的任一方不利遗传（RG）和/或表型（R_P）的相关性或WCIN（r_g：-0.45±0.15，R_P ：0.01±0.03）。 IGF-I和NBA或ABWT的遗传相关均较低，在平价一和二，奇偶3不利有利，但不显著从零在所有情况下的不同。在多特征背景下，选择以提高利用未成年人提供的信息瘦肉生产效率IGF-I是不太可能导致母猪繁殖性能显著不利的相关回应。

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