摘要
研究马占相思的染色体数目及核型．马占相思体细胞染色体数目为２ｎ＝２６，９对（Ｎｏ．２，４，６，８～１３）为中部着丝点染色体，４对（Ｎｏ．１，３，５，７）为近中部着丝点染色体，其中第１对（Ｎｏ．１）染色体上具小随体（ｓａｔ），其核型组成为Ｋ（２ｎ）＝２６＝１８ｍ＋８ｓｍ（２ｓａｔ）；染色体长度比（最长／最短）为２．５０，臂比均小于２，属Ｓｔｅｂｂｉｎｓ“１Ｂ”
The karyotype and chromosome number of Acacia mangium,were analysed on meristematic cell of root tips The result showed that the chromosome number in each somatic cell was 2 n=26 The 9 pairs of chromosomes (No 2,4,6,8～13)were metacentric,and the 4 pairs of chromosomes (No 1,3,5,7)were submetac-entric The first of pairs (No 1)was SAT-chromosome According to the classification made by L C Saylor,the karyotype formula is K(2 n)=26=18 m8 4sm(2 sat) According to the ratio of chromosome length (largest /smallest) and the proportion of chromosomes with arm ratio<2 in the comp / ement of the karyotype of Acacia mangium belongs to Stebbins“1 B” karyotype symmetry
出处
《西南林学院学报》
1997年第2期64-68,共5页
Journal of Southwest Forestry College
基金
国家"八五"重点科技攻关项目
关键词
马占相思
染色体数目
核型分析
Acacia mangium
Chromosome number
Karyotype analysis
