| 棕色田鼠第一对常染色体多态与染色体数目关系的研究 |
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| 引用本文： | 张敏,朱必才.棕色田鼠第一对常染色体多态与染色体数目关系的研究[J].陕西师范大学学报,2000,28(2). |
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| 作者姓名： | 张敏 朱必才 |
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| 作者单位： | 陕西师范大学生命科学学院!陕西西安710062(张敏)，徐州师范大学生物学系!江苏徐州221009(朱必才) |
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| 基金项目： | 国家自然科学基金资助项目!(39970 4 0 5) |
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| 摘 要： | 研究了棕色田鼠 (Microtusmandarinus)三种性别类型个体 (XY ,XX ,XO)的第一对常染色体多态与染色体数目之间关系 .发现第一对常染色体极不稳定 ,存在( 1 )M ,M (一对中部着丝点染色体 ) ;( 2 )M ,T ,T (一条中部着丝点染色体 ) ;( 3)T ,T ,T ,T(无中部着丝点染色体 )三种多态类型 .性别类型相同个体的染色体数目随第一对常染色体类型的不同发生有规律地变化 .认为罗伯逊断裂是引起棕色田鼠第一对常染色体多态及其染色体数目多态的主要原因
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| 关 键 词： | 棕色田鼠 染色体多态 罗伯逊断裂 |
Relation between polymorphism of chromosome No. 1and chromosome number in Microtus mandarinus |
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| ZHANG Min,ZHU Bi-cai.Relation between polymorphism of chromosome No. 1and chromosome number in Microtus mandarinus[J].Journal of Shaanxi Normal University: Nat Sci Ed,2000,28(2). |
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| Authors: | ZHANG Min ZHU Bi-cai |
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| Abstract: | The relation between polymorphism of chromosome No.1 and the chromosome number has been studied in three sex types of individuals (XY, XX, XO). The chromosome No.1 is Very unstable, and there are three types:(1)M,M(With a double metacentric chromosomes), (2)M, T, T(With single metacentric chromosome).(3)T,T,T,T(Without metacentric chromosome). The chromosome number of the same sex individuals changes reqularly with the type change of chromsome No.1. Robertsomian fission is the main reason of the polymorphism of chromosome No.1 and of the variation of chromosome numnber in M. mandarinus . Therefore, the mandarin vole is ideal model animals for cytogenetic research. |
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| Keywords: | Microtus mandarinus chromosome polymorphism Robertsonian fission |
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