摘要
采用空气干燥法对周期型马来丝虫染色体进行了研究,结果显示卵原细胞分裂中期相有4对小型的常染色体和1对大型的性染色体,精原细胞分裂中期相有4对小型的常染色体和1个大型的与1个中型的性染色体,终变期的卵母细胞有5个二价的染色体,次级精母细胞有5个单价染色体.以及受精卵分裂中期相有10个染色体。表明该虫染色体数为2n=10,性别决定机制为XY-XX型。
A study was carried out on the chromosomes of periodic Brugia walayi usirg air drying preparations of testis, ovary and uterus. The results showed that the oogonial metaphase consisted of 4 pairs of small-sized autosomes and one pair of large-sized rex-chromosomes, that the spermatogonial metaphase consisted of 4 peirs of small-sized autcmes and one large-sized and one medium-sized sex-chromosome, the oocytes at diakinesis had 5 bivalents, the secondary spermatocytes 5 wnivalents and the fertilized eggs 10 chromosomes. The above-mentioned findings revealed that the chromosome number was 2n=10 and that the sex-determining mechanism was of the XY-XX type in this type of B. malayi.
出处
《中国寄生虫学与寄生虫病杂志》
CAS
CSCD
北大核心
1990年第3期185-186,共2页
Chinese Journal of Parasitology and Parasitic Diseases
关键词
马来丝虫
染色体
有丝分裂
Brugia mfllayi, chromosome, mitosis, meiosis
