QUANTITATIVE COMPARISONS BETWEEN KARYOTYPES OF AUSTRALIAN MARSUPIALS FROM 3 DIFFERENT SUPERFAMILIES
QUANTITATIVE COMPARISONS BETWEEN KARYOTYPES OF AUSTRALIAN MARSUPIALS FROM 3 DIFFERENT SUPERFAMILIES
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DOI：
10.1007/bf00326187
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发表时间：
1967-01-01
期刊：
影响因子：
1.6
通讯作者：
HAYMAN, DL
中科院分区：
文献类型：
--
作者：
MARTIN, PG;HAYMAN, DL
本文研究了毛总科6种、长枪总科5种和穿孔总科4种的相对DNA值和染色体臂的百分比长度。通过乘以相对DNA值，所有百分比长度都以相同的单位表示。如果两个物种的染色体臂都没有在5%的概率水平上不同，那么这两个物种就被称为“共享”一条染色体。有人认为，如果物种“共享”至少2个双臂染色体，这可以作为关系的证据。本文定义了一个“标准的”Dasyuridae核型，个别物种的Dasyuridae核型与之有很小的偏差。本文讨论了有袋动物染色体数目双峰分布的性质和意义。
Relative DNA values and percent lengths of chromosome arms have been studied for 6 species of the superfamily Dasyuroidea, 5 species of Phalangeroidea and 4 species of Perameloidea. By multiplying by relative DNA values all percent lengths have been expressed in the same units. Two species are said to "share" a chromosome if neither of the arms differs at the 5% level of probability. It is argued that if species "share" at least 2 two-armed chromosomes this can be taken as evidence of relationship. A "standard dasyurid" karyotype has been defined and individual species of Dasyuridae show only small deviations from it. The nature and significance of the bi-modal distribution of chromosome numbers in marsupials is discussed.