The cases of karyotypic evolution mentioned so far have concerned karyotypes of related species . 到现在为止所提到的染色体组型进化的例子都是关于相近物种的染色体组型。
2.
However , only three species of the cephalochordate including b . lanceolatum , b . floridae , and b . belcheri , have so far been studied for their chromosome numbers , and the karyotypic analysis and banding study of amphioxus chromosomes remains largely untouched Floridae 、 b belcheri三种文昌鱼染色体数目。有关文昌鱼染色体核型和带型的研究尚未见任何报道，文昌鱼染色体核型和带型的研究将为比较基因组学和细胞遗传学研究提供珍贵的背景资料。
3.
Recently , we know the number of muntjac deer chromosomes varies from 6 to 48 , and there are karyotypic polymorphism intra - species relationships . these animals are extremely useful for phylogenetic studies . in order to discuss the phylogenetic relationships of muntiacinae , we have studied the nuclear gene sequence of muntiacus muntjak , muntiacus crinifrons , muntiacus reevesi , and elaphodus cephalophus 为了探讨麂亚科动物间的亲缘关系，本论文以赤麂( muntiacusmuntjak ) 、黑麂( muntiacuscrinifrons ) 、小麂( muntiacusreevesi )和毛冠鹿( elaphoduscephalophus )这4种麂亚科动物为材料，以核基因序列为研究对象，作进一步的研究。
