| 云南松居群核型变异及其分化研究 |
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| 引用本文： | 虞泓,黄瑞复.云南松居群核型变异及其分化研究[J].中国科学院研究生院学报,1998,36(3):222-231. |
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| 作者姓名： | 虞泓 黄瑞复 |
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| 摘 要： | 在分析研究6个云南松居群核型变异的基础上，应用常规统计方法和巢式分析方法，在常规染
色体水平上探讨云南松居群间、个体间和细胞间的变异式样及其分化。结果如下:(1)云南松居群核型
变异不显著，6个居群的核型公式均为2n=24m(6～10SAT)，核型类型均为1A。(2)云南松居群仅相
对长度系数、臂比和次缢痕数目及其分布有小的变化。6个居群染色体相对长度系数(I．R．L)分别为:
滇中居群P1=16M2+6M1+2S；滇东南居群P2=14M2+8M1+2S；滇西居群P3=12M2+10M1+2S；
地盘松居群P4=14M2+8M1+2S；细叶云南松居群P5=14M2+8M1+2S；云南松与思茅松渗入杂交
居群P6=10M2+12M1+2S。(3)巢式方差等级分析表明，云南松染色体结构变异有10％左右来源于居群间，有90％左右来源于居群内个体间或细胞间。
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| 关 键 词： | 云南松 居群 核型变异 染色体 |
Study on Karyotypical Variation and Differentiation in Populations of Pinus yunnanensis Franch. |
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| YU Hong,HUANG Rui-Fu.Study on Karyotypical Variation and Differentiation in Populations of Pinus yunnanensis Franch.[J].Journal of the Graduate School of the Chinese Academy of Sciences,1998,36(3):222-231. |
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| Authors: | YU Hong HUANG Rui-Fu |
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| Abstract: | Analyzed in the present paper was the karyotype in six populations (Pi ,P2,P3,
P4, P5, P6 ) of Pinus yunnanensis Franch. P1 is distributed in the central region of Yun-
nan, P2 in the southeast, P3 in tbenorthwest, P4(P. yunnanensis var. pygmaea (Hsüeh)
Hsüeh)in the centre, P5(P. yuunnanensis var. tenuifolia Cheng et Law)in the juncture of
southeastern Yunnan, northern Guangxi and southern Guizhou, and P6 is an introgression
population between P. yunnanensis Frach and P. kesiya Royle ex Cord. var. langbianen-
sis (A. Chev) Gaussen. The six populations had almost the same karyotypical formula, i.e.,
2n= 2x= 24 = 24m(6～10 SAT). All the karyotypes of the six populations belong to the
Stebbins' 1A. Therefore, no obvious variation was detected at general karyotype level in P.
yunnanensis, but there existed slight variation in relative length, arm ratio, number of sec-
ondary constrictions and their distribution among the six populations. The indexes of relative
length in the six populations are as follows: P1 = 16M2 + 6M1 + 2S; P2 = 14M2 + 8M1 + 2S;
P3 = 12M2 + 10M1 + 2S; P4 = 14M2 + 8M1 + 2S; P5 = 14M2 + 8M1 + 2S; P6 = 10M2 + 12M1
+ 2S. The nested analysis of variance shows that about 10％ of the chromosomal variability
is attributed to the differentiation among populations and the remaining 90 % within popula-tion. |
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| Keywords: | Pinus yunnanensis Franch． Population Karyotypical variation Chromosome |
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