Karyotype studies on ten Iris pecies(Iridaceae) from Sichuan,China
Chromosome number and karyotype analysis of 10 taxa in the genus Iris (Iridaceae) from Sichuan,China were investigated in this study.The chromosome number and karyotype formula of 10 Iris taxa are as follows:I.lactea,2n = 40 = 28m + 10sm + 2st;I.lactea var.chinensis,2n = 40 = 18m + 16sm + 6st (6SAT);I.chrysographes,2n = 40 = 18m + 22sm (2SAT);I.japonica,2n = 36 = 16m + 14sm + 6st;I.tectorum,2n = 28 = 16m (4SAT) + 12sm (2SAT);I.confusa,2n = 32 = 8m + 18sm + 6st;I.germanica,2n = 40 = 16m + 20sm + 4st;I.sichuanensis,2n = 26 = 12m (4SAT) + 12sm (2SAT) + 2st;I.leptophylla,2n = 26 = 14m (2SAT) + 10sm (4SAT) + 2st;I.goniocarpa,2n = 26 = 12m + 12sm + 2st (2SAT).The karyotypes of I.sichuanensis,I.leptophylla,I.goniocarpa,I.lactea,I.confusa and I.germanica were firstly reported,and the chromosome number of I.confusa and I.germanica were newly observed.Based on the karyotype results and previous studies,we suggested that:(1) I.wattii,I.confusa and I.japonica are three independent species;(2) I.sichuanensis,I.leptophylla and I.goniocarpa are three independent species with close relationships;(3) it is reasonable to treat I.lactea var.chinensis as a variety of I.lactea.
china chromosome number Iris karyotype taxonomy
XIAO-FANG YU SU-PIPN GAO HUI-XING SONG JIANG SUN MING-YAN JIANG BING-QI CHEN
landscape Research Institute, Sichuan Agricultural University, Wenjiang 611130, Chengdu, Sichuan, P.R. China
国内会议
成都
英文
124-135
2010-07-01（万方平台首次上网日期，不代表论文的发表时间）