ZHU Gen-fa
Floricultural Research Institute of Guangzhou Academy of Agricultural Sciences, Guangdong Key Laboratory of Ornalmental Plant Germplasm Innovation and UtilizationYANG Zhi-juan
1. Floricultural Research Institute of Guangzhou Academy of Agricultural Sciences, Guangdong Key Laboratory of Ornalmental Plant Germplasm Innovation and Utilization; 2. College of Horticulture, Northwest Sci-Techn University of Agriculture and ForestryWANG Bi-qing
Floricultural Research Institute of Guangzhou Academy of Agricultural Sciences, Guangdong Key Laboratory of Ornalmental Plant Germplasm Innovation and UtilizationLÜ Fu-bing
Floricultural Research Institute of Guangzhou Academy of Agricultural Sciences, Guangdong Key Laboratory of Ornalmental Plant Germplasm Innovation and UtilizationZHANG Xian
College of Horticulture, Northwest Sci-Techn University of Agriculture and ForestryKaryotypes of 12 species of Paphiopedilum subgenus Paphiopedilum were studied by root tips squash method. The results showed that the chromosome number and karyotype were different among these species. The formulae were as follows: P. philippinense for 2n=2x=26=16m+10sm, P. dithanum for 2n=2x=26=20m+6sm, P. densissimum for 2n=2x=26=22m+4sm, P. parishii and P. hirsutissimum for 2n=2x=26=24m+2sm, P. henryanum, P. markianum and P. rhizomatosum for 2n=2x=26=26m, P. callosum for 2n=2x=32=2M+24m+6sm, P. microchilum for 2n=2x=38=28m+10sm, P. appletonianum and P. hainanensis for 2n=2x=38=30m+8sm. The diploid mainly consisted of metacentric chromosomes without satellites. The ratio of the longest chromosome to the shortest chromosome (Lc/Sc) ranged from 2.07 to 3.44. The percentage of chromosomes with arm ratio (P.C.A)＞2 ranged from 0 to 23.1%. The index of the karyotypic asymmetry (As.K) was from 53.50% to 58.95%. The karyotypes of P. henryanum, P. dithanum, P. densissimum, P. parishii, P. markianum and P. rhizomatosum were of Stebbins’s 1B type, and the others belong to 2B type.
朱根发,杨志娟,王碧青,吕复兵,张显.兜兰亚属12种植物的核型分析[J].热带亚热带植物学报,2011,19(2):152~158
Copy
