The Giemsa C-Band karyotypes of six lolium species
The Giemsa C-Band karyotypes of six lolium species
复制标题
六种黑麦草的 Giemsa C 带核型
DOI：
10.1038/hdy.1981.33
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发表时间：
1981
期刊：
影响因子：
3.8
通讯作者：
H M Thomas
中科院分区：
文献类型：
--
作者：
H M Thomas
自交系的带型。temulentum和L. rectum非常相似（它们仅在一条染色体上不同），表明它们非常接近。但自交系L. loliaceum与其他两个近亲繁殖的动物几乎没有相似之处，与异系繁殖的动物有更多的共同点。近交种的染色体总长度比远交种的长约40%，C带总长度是远交种的两倍多。temulentum和L. remotum如L. perenne（outbreeder）.黑麦草C带异染色质每单位长度的DNA含量是常染色质的7.2倍。虽然异染色质的比例是在那些物种与大多数DNA，整个属的DNA总量的实际变化是由于同样的常染色质和异染色质DNA的变化。结论是，物种分化一直伴随着总染色体形态和带型的变化。
The banding patterns of the inbreeders L. temulentum and L. remotum were very similar (they differed in only one chromosome), indicating that they are very closely related. However, the banding pattern of the inbreeder L. loliaceum bore little resemblance to the other two inbreeders, having more in common with the outbreeders. The total chromosome length was about 40% greater in the inbreeding than in the outbreeding species and the total length of C-bands was more than twice as great in L. temulentum and L. remotum as in L. perenne (outbreeder). C-band heterochromatin in Lolium had 7.2 times as much DNA per unit length as euchromatin. While the proportion of heterochromatin was greater in those species with most DNA, the actual changes in total DNA amount throughout the genus were due equally to changes in euchromatic and heterochromatic DNA. It is concluded that species differentiation has been accompanied by changes in gross chromosome morphology and banding patterns.