对鸡体重进行 divergent 选择对其三种骨骼肌特征的影响。注：“divergent selection”直译为“发散选择”，这里可能是一种特定的专业术语表达，在没有更多背景信息的情况下，按字面意思翻译了。你可根据实际情况进一步确认其准确含义。

Effects of divergent selection for body weight on three skeletal muscles characteristics in the chicken.

Remignon H, Lefaucheur L, Blum J C, Ricard F H

Institut National de la Recherche Agronomique, Station de Recherches Avicoles, Nouzilly, France.

Br Poult Sci. 1994 Mar;35(1):65-76. doi: 10.1080/00071669408417671.

Abstract

Histochemical (fibre type distribution and areas) and biochemical (myosin isoforms) characteristics of three muscles, M. anterior latissimus dorsi, M. pectoralis major and M. sartorius, were compared among male chickens of two lines at 11 and 55 weeks of age. 2. The lines were derived from a divergent selection based on growth rate. Cockerels from the Fast Growing Line (FGL) were 2.3 times heavier than those from the Slow Growing Line (SGL) when 11 weeks old and 1.7 times at 55 weeks of age. The latter age was chosen as representative of the adult stage and the 11-week age because, at this time, FGL cocks weighed as much as SGL cockerels at 55 weeks. 3. At both ages, the two lines showed similar fibre type distributions, but the total number in the ALD muscle, and the size (cross-sectional areas) of fibres in each muscle were higher in the FGL compared with the SGL (14.6% and 33% more at 11 and 55 weeks of age respectively in favour of the FGL birds). 4. The two lines displayed similar myosin isoform patterns when adult muscles were compared (55 weeks). They differed slightly at 11 weeks of age, muscle differentiation being completed only in the FGL. 5. Comparisons of the two lines at the same live weight (i.e. FGL cockerels at 11 weeks of age and SGL cockerels at 55 weeks) showed larger muscle fibres in the SGL and no difference in the isomyosin patterns.

摘要

对两条品系雄性鸡在11周龄和55周龄时的三块肌肉（背阔肌、胸大肌和缝匠肌）进行了组织化学（纤维类型分布和面积）和生物化学（肌球蛋白亚型）特征比较。2. 这两条品系源自基于生长速度的差异选择。快速生长品系（FGL）的公鸡在11周龄时比慢速生长品系（SGL）的公鸡重2.3倍，在55周龄时重1.7倍。选择55周龄作为成年阶段的代表，11周龄是因为此时FGL公鸡的体重与SGL公鸡在55周龄时相同。3. 在两个年龄阶段，两条品系的纤维类型分布相似，但与SGL相比，FGL的背阔肌纤维总数以及每块肌肉中纤维的大小（横截面积）更高（11周龄和55周龄时分别多14.6%和33%，有利于FGL鸡）。4. 比较成年肌肉（55周龄）时，两条品系的肌球蛋白亚型模式相似。在11周龄时略有不同，肌肉分化仅在FGL中完成。5. 对相同体重的两条品系进行比较（即11周龄的FGL公鸡和55周龄的SGL公鸡），结果显示SGL的肌纤维更大，等肌球蛋白模式没有差异。