The use of diets with increased dietary fibre content (HF) from alternative feedstuffs is a solution to limit the impact of increased feed costs on pig production. This study aimed at determining the impact of an alternative HF diet on pig digestibility and at estimating genetic parameters of this trait. Digestibility coefficients (DC) of energy, organic matter and nitrogen were predicted from faecal samples analysed with near infrared spectrometry for 1,242 samples, and it represented 654 Large White pigs fed a conventional (CO) diet and 588 fed a HF diet. Growth and feed efficiency traits, carcass composition and meat quality traits were recorded. Pigs fed the HF diet had significantly lower DC than pigs fed the CO diet (-4.5 to 6.0 points). The DC were moderately to highly heritable (about 0.26 ± 0.12 and 0.54 ± 0.15 in the CO and the HF diet, respectively). Genetic correlations were favourable with feed conversion ratio, daily feed intake and residual feed intake, but unfavourable with average daily gain (ADG) and carcass yield (CY). To conclude, DC could be an interesting trait to include in future breeding objectives if pigs were fed diet with HF diets, but adverse genetic trends with ADG and CY would have to be taken into account.

中文翻译：

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饲喂常规或高纤维日粮的生长猪消化效率的遗传学

使用来自替代饲料的膳食纤维含量 (HF) 增加的日粮是限制饲料成本增加对生猪生产影响的解决方案。本研究旨在确定替代 HF 日粮对猪消化率的影响，并估计该性状的遗传参数。能量、有机物和氮的消化率系数 (DC) 是通过使用近红外光谱分析的 1,242 个样本的粪便样本预测的，它代表了 654 头喂食常规 (CO) 饮食的大白猪和 588 头喂食 HF 饮食的大白猪。记录生长和饲料效率性状、胴体组成和肉质性状。喂食 HF 饮食的猪的 DC 显着低于喂食 CO 饮食的猪（-4.5 至 6.0 分）。DC 具有中等至高度的遗传性（CO 和 HF 饮食中约为 0.26 ± 0.12 和 0.54 ± 0.15，分别）。遗传相关性与饲料转化率、日采食量和剩余采食量相关，但与平均日增重 (ADG) 和胴体产量 (CY) 相关。总而言之，如果猪用 HF 日粮喂养，DC 可能是一个有趣的性状，包括在未来的育种目标中，但必须考虑 ADG 和 CY 的不利遗传趋势。