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 May;82(5):823-30. doi: 10.1093/ps/82.5.823.
This 42-day experiment was undertaken to compare the nutritional value of insect-protected corn event MON810 (YieldGard) and YieldGard x herbicide-tolerant corn event GA21 (Roundup Ready) to their nontransgenic controls as well as four different commercial reference corns, when fed to growing Cobb x Cobb broilers. A randomized complete block design was used, and each treatment was replicated with five pens of males and five pens of females with 10 broilers per pen. Broilers were fed approximately 55% wt/wt corn during the first 20 d and approximately 60% wt/wt corn thereafter. The corn component of diets fed to broilers was supplied entirely with grain from the eight hybrids included in the experiment. Final live weights averaged 2.09 kg/bird fed YieldGard corn and 2.15 kg/bird fed YieldGard x Roundup Ready corn and were not different (P > 0.05) from final weights for birds fed control or commercial corn. Feed conversion was not affected (P > 0.05) by YieldGard (1.72) or YieldGard x Roundup Ready (1.77) corn feeding when compared with the feeding of other corn diets. Chill weights, fat pad, thigh weights, and wing weights were not affected by diets (P > 0.05). Differences (P < 0.05) were noted for breast and drum weights across treatments. Broilers overall performed consistently and had similar carcass yield and meat composition when fed diets containing YieldGard (event MON810) or YieldGard (event MON810) x Roundup Ready (event GA21) as compared with their nontransgenic controls and commercial diets.
本42天的实验旨在比较抗虫玉米事件MON810（先正达抗虫玉米YieldGard）和抗虫耐除草剂玉米事件GA21（孟山都抗除草剂玉米Roundup Ready）与其非转基因对照以及四种不同商业对照玉米在饲喂生长中的科宝肉鸡时的营养价值。实验采用随机完全区组设计，每个处理重复5栏雄性和5栏雌性，每栏10只肉鸡。肉鸡在最初20天饲喂约55%（重量/重量）的玉米，此后饲喂约60%（重量/重量）的玉米。饲喂肉鸡的日粮中的玉米成分完全由实验中包含的八个杂交品种的谷物提供。饲喂先正达抗虫玉米YieldGard的肉鸡平均末重为2.09千克/只，饲喂先正达抗虫耐除草剂玉米YieldGard x Roundup Ready的肉鸡平均末重为2.15千克/只，与饲喂对照或商业玉米的肉鸡末重无差异（P>0.05）。与其他玉米日粮相比，先正达抗虫玉米YieldGard（1.72）或先正达抗虫耐除草剂玉米YieldGard x Roundup Ready（1.77）的饲喂对饲料转化率无影响（P>0.05）。冷宰重、脂肪垫、大腿重和翅膀重不受日粮影响（P>0.05）。不同处理间鸡胸肉和鸡腿肉重量存在差异（P<0.05）。与非转基因对照和商业日粮相比，饲喂含有先正达抗虫玉米（事件MON810）或先正达抗虫玉米（事件MON810）x抗除草剂玉米（事件GA21）的日粮时，肉鸡总体表现一致，胴体产量和肉质组成相似。
