饲养方式和酵母浓度对果蝇寿命及繁殖力的影响

Effects of Feeding Ways and Yeast Concentration on the Longevity and Fecundity of Drosophila

[目的]探讨饲养方式和酵母浓度对果蝇寿命及繁殖力的影响。[方法]以黑腹果蝇为研究对象,通过雌雄果蝇混合饲养与雌/雄果蝇单独饲养2种方式,对比其对雌、雄性果蝇寿命的影响。通过测定果蝇的寿命和繁殖力等,研究不同酵母浓度对果蝇生命力的影响。[结果]单独饲养雌、雄性果蝇的平均寿命比雌雄混合饲养长,差异达到极显著水平(P<0.01)。雌性果蝇的平均寿命明显长于雄性果蝇。酵母浓度对雌性果蝇的寿命有显著影响,不添加酵母的培养基饲养的雌性果蝇的平均寿命明显短于添加酵母的培养基饲养的。当培养基中酵母浓度为6.58 g/L时,饲养的雌/雄性果蝇的平均寿命最长。[结论]在培养基中添加适量的酵母可以显著提高果蝇后代数量,增强果蝇的繁殖力。不同饲养方式和不同酵母浓度对果蝇生命力都有影响。

[Objective] To discuss the effects of feeding ways and yeast concentration on the longevity and fecundity of drosophila.[Method] Taking Drosophila melanogaster as research object,using two feeding ways（mixed feeding of male and female,feeding female /male alone）, the longevity of female and male drosophila was compared.By determining the longevity and fecundity of D.melanogaster, the effects of different yeast concentrations on the viability of D.melanogaster were studied.[ Result] The average longevity of D.melanogaster in the feeding ways of female /male alone was longer than that in the feeding ways of mixed feedings of male and female, with extremely significant difference（P〈0.01）.The average longevity of female D.melanogaster was obviously longer than that of male D.melanogaster.Yeast concentration had significant effects on the longevity of female D.melanogaster.The average longevity of female D.melanogaster fed in the culture medium without yeast was obviously shorter than that in the culture medium with adding yeast.When yeast concentration in culture medium was 6.58 g/L, the average longevity of fe-male and male D.melanogaster reached the maximum.[Conclusion] Adding appropriate amount of yeast in culture medium could significantly in-crease the number of D.melanogaster offsprings and enhance the fecundity of D.melanogaster.Different feeding ways and different yeast concen-trations had effects on the viability of D.melanogaster.