数字农科院2.0

Two-Generation Crossbreeding of White-Headed Suffolk and Small-Tailed Han Sheep: Heterosis, Sustainable Production Traits, and Morphological Features in Central China

文献类型： 外文期刊

作者： Kai Quan;Jun Li;Haoyuan Han;Kun Liu;Huibin Shi;Huihua Wang;Meilin Jin;Wei Sun;Caihong Wei

作者机构：

关键词： crossbreeding;heterosis;meat quality;small-tailed Han sheep;white-headed Suffolk sheep

期刊名称： Animals

ISSN： 2076-2615

年卷期： 2025 年 15 卷 7 期

页码：

收录情况： SCIE（2025版）

摘要： To address the bottleneck in meat production efficiency within China’s mutton sheep industry, this study established a two-generation crossbreeding program between WHS rams and STH ewes. Hybrid offspring (F1 and BC1) were evaluated for growth performance, slaughter traits, meat quality, and reproductive performance. The F1 generation exhibited significant improvements over STH in 6-month body weight (52.3 kg, +27.3%), dressing percentage (56.1%, +6.3%), and feed efficiency ratio (FER) of 4.6 (p < 0.05). The BC1 generation shows a mixed state of paternal and maternal characteristics and further enhanced these traits, achieving a 6-month body weight of 55.2 kg (+5.4% vs. F1), a dressing percentage of 58.3%, and an optimized gain-to-feed ratio (G:F) of 4.2 (−8.7%). Meat quality parameters, including shear force (32.5 N vs. 41.6 N in F1 vs. STH) and intramuscular fat content (4.5% vs. 3.8% in F1 vs. STH), demonstrated superior tenderness and marbling. Despite a decline in lambing rate (F1: 178%; BC1: 142%), the hybrids combined the dam’s adaptability with the sire’s meat traits, forming a novel germplasm for sustainable mutton production. This study provides a replicable model for balancing genetic improvement and ecological sustainability in central China.

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