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

ZHOU Qinfei, TAO Ke, WANG Yongcai, XIAO Wenchuan, WANG Weilin

doi:10.3969/j.issn.1006-267x.2012.02.024

Chinese Journal of Animal Nutrition >

2012 , Vol. 24 >Issue 2: 358 - 363

DOI: https://doi.org/10.3969/j.issn.1006-267x.2012.02.024

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

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Animal Science Department, Rongchang Campus of Southwest University, Chongqing 402460, China

Received date: 2011-08-15

Online published: 2012-02-07

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Abstract

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.

Key words： female rabbit; baby rabbit; methionine; hair follicle development

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ZHOU Qinfei, TAO Ke, WANG Yongcai, XIAO Wenchuan, WANG Weilin . Methionine Level in the Diet for Pregnant Female Rabbits Affects Hair Follicle Development of Baby Rabbits[J]. Chinese Journal of Animal Nutrition, 2012 , 24(2) : 358 -363 . DOI: 10.3969/j.issn.1006-267x.2012.02.024

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