母兔妊娠期饲粮蛋氨酸水平对仔兔毛囊发育的影响

本文旨在研究母兔妊娠期饲粮蛋氨酸水平对仔兔毛囊发育的影响.选择体重、胎次和历史产毛量相近的健康长毛兔母兔54只,随机分为3组,每组18个重复,每个重复1只.妊娠期各组分别饲喂蛋氨酸水平为0.51％、0.71％和0.91％的饲粮.测定18胎龄、26胎龄、初生和2月龄时仔兔背部皮肤毛囊密度、直径以及2月龄时毛纤维直径.结果...

Methionine Level in the Diet for Pregnant Female Rabbits Affects Hair Follicle Development of Baby Rabbits

This experiment was conducted to study the effects of methionine level in diet for pregnant female rabbits on the development of hair follicle of baby rabbits.Fifty-four healthy female long-haired Angora rabbits with similar body weight,parities and historical hair yield were randomly assigned into three groups with eighteen replicates in each group and one rabbit per replicate.Rabbits during pregnancy were fed diets with 0.51%,0.71% and 0.91% methionine,respectively.Hair follicle density and diameter in the back skin were determined at 18-day fetus,26-day fetus,newborn and 2-month-old,and hair fiber diameter at 2-month-old was also determined.The results showed as follows: 1) hair follicle density and diameter at each stage,coarse hair fiber diameter at 2-month-old showed a tendency of increasing with dietary methionine level(P>0.05),fine hair diameter in 0.91% group was significantly larger than that in 0.51% group at 2-month-old(P<0.05).2) With the development of baby rabbit,the ratio of secondary follicle and primary follicle increased gradually,at newborn of rabbits in group 0.51%,0.71% and 0.91% were 5.84,5.56 and 5.81,respectively,and at 2-month-old were 8.47,7.97 and 8.03,respectively.3) Baby rabbits in group 0.51%,0.71% and 0.91% gained increases of primary follicle diameter by 0.58,0.57 and 0.61 μm/d from 26-day fetus to birth,and 0.11,0.11 and 0.12 μm/d from birth to 2-month-old,respectively;they also gained increases on secondary follicle diameter by 0.00,0.01 and 0.01 μm/d from birth to 2-months-old,respectively.These results indicate that increase of methionine level in diet for female rabbits during pregnancy is a stimulation factor for the development of hair follicle of baby rabbits,and can improve their hair fiber diameter.