Taylor M L, Hartnell G F, Riordan S G, Nemeth M A, Karunanandaa K, George B, Astwood J D
Monsanto Company, 800 N. Lindbergh Blvd., St. Louis, Missouri 63167, USA.
Poult Sci. 2003 Mar;82(3):443-53. doi: 10.1093/ps/82.3.443.
Two 42-d experiments compared the nutritional value of the glyphosate-tolerant corn event NK603 (Roundup Ready corn) (experiment 1) and the combined traits, insect-protected corn event MON 810 (YieldGard com) x glyphosate-tolerant corn event NK603 (experiment 2) to their respective non-transgenic controls and to commercial reference corn, when fed to growing broilers. For each experiment, a randomized complete block design was used with eight dietary treatments in each of five replicated blocks of pens (eight pens for males and eight pens for females per block). Final live weights and feed conversion were not different (P > 0.05) across all treatments in both experiments. In experiment 1, broilers fed diets containing Roundup Ready corn had similar feed conversion adjusted for mortalities to those fed the non-transgenic control and one of the commercial corn diets. Chill weights and thigh, drum, and wing weights were not affected by diets. Differences (P < 0.05) were noted for breast meat and fat pad weights across treatments. In experiment 2, the adjusted feed conversion and carcass parameters were not affected by diets. Differences (P < 0.05) were noted only for protein content of breast meat. Differences observed in both experiments were consistent with natural variability. Broilers in general performed consistently and had similar carcass yields and meat compositions when fed diets containing Roundup Ready corn or YieldGard x Roundup Ready corn as compared with their respective non-transgenic control and commercial diets supporting similar feeding values among diets.
两项为期42天的实验比较了耐草甘膦玉米品系NK603（抗农达玉米）（实验1）以及兼具抗虫和耐草甘膦特性的玉米品系MON 810（先正达抗虫玉米）×NK603（实验2），与各自的非转基因对照及市售参考玉米对生长肉鸡的营养价值。在每项实验中，采用随机完全区组设计，在五个重复区组的围栏中设置八种日粮处理（每个区组有八只雄性围栏和八只雌性围栏）。在两项实验中，所有处理的最终活重和饲料转化率均无差异（P>0.05）。在实验1中，饲喂含抗农达玉米日粮的肉鸡，经死亡率调整后的饲料转化率与饲喂非转基因对照和一种市售玉米日粮的肉鸡相似。冷却体重以及大腿、小腿和翅膀重量不受日粮影响。不同处理间胸肉和脂肪垫重量存在差异（P<0.05）。在实验2中，调整后的饲料转化率和胴体参数不受日粮影响。仅胸肉蛋白质含量存在差异（P<0.05）。两项实验中观察到的差异与自然变异性一致。与各自的非转基因对照和市售日粮相比，饲喂含抗农达玉米或先正达抗虫×抗农达玉米日粮的肉鸡总体表现一致，胴体产量和肉成分相似，表明日粮间具有相似的饲喂价值。
