Cytological Study of Four Wild Ornamental Plants in Northwest Yunnan

Authors Chen Guangfu; Xu Bo

Journal Chinese Wild Plant Resources , 2020,10:39

Abstract Based on previous researches,the cytology of four kinds of floral resource plants in the northwestern of Yunnan province were studied,and the differentiation at the cellular chromosome level was discussed by adopting the method of regular tabletting of root tip.The results showed that the Karyotype formula of Primula secundiflora Franch.was 2n = 2x = 22 = 22m,belonged to Stebbins''s-1B of Karyotype type with the AI value 2.91 and was diploid plant;the Karyotype formula of P.forrestii Balf.f.was 2n = 2x = 24 = 22m + 2sm,belonged to Stebbins''s-1B of Karyotype type with the AI value 3.99 and was diploid plant;the Karyotype formula of Cyananthus formosus Diels.was 2n = 2x = 12 = 10m + 2sm, belonged to Stebbins''s-1B of Karyotype type with the AI value 5.63 and was diploid plant;and the Karyotype formula of Allium wallichii Kunth was 2n = 2x = 14 = 6m + 8sm,belonged to Stebbins''s-2A of Karyotype type with the AI value 3.12 and was diploid plant.According to the cytological data of four different groups of plants in the northwest of Yunnan,the differences of karyotype characteristics between P.secundiflora and P.forrestii were minor,while the differences between C.formosus and A.wallichii were significant.The cytological data mentioned above provided fundamental data for the origin and differentiation of plant flora in the northwestern of Yunnan,the excavation and utilization of germplasm resources, and also replenished the cytological data of the area.

Species covered 多星韭 Allium wallichii 美丽蓝钟花 Cyananthus formosus