新疆地区伊犁郁金香花色表型多样性及其与地理因子的相关性OA

To investigate the flower color phenotypic diversity of natural Tulipa iliensis populations,flower color phe-notypic values were measured using a colorimeter for 315 individuals from 23 natural populations.One-way ANOVA,cluster analysis and correlation analysis were used to examine flower color phenotypic diversity across populations.Results showed that the values of lightness(L*),redness(a*),yellowness(b*),chroma(C*)and hue angle(h)varied to different extents among populations,with considerable differences observed between some populations.Across the 23 populations,L* ranged from 45.64 to 67.19,mainly indicating medium lightness;a* ranged from 2.43 to 14.95,biased towards red with low redness intensity;b* ranged from 19.13 to 40.83,biased towards yellow with low-to-medium yellowness intensity;C* ranged from 25.88 to 43.50,belonging to the medium-to-high saturation level;and h ranged from 24.82 to 78.27,corresponding to red,orange-red,and orange-yellow color types.Cluster analysis indicated that at a Euclidean average distance of 5,the 23 populations could be divided into three groups.Groups Ⅰ and Ⅱ each contained 10 populations(43.48％each),with the flower color of Group Ⅱ predominantly orange.Group Ⅲ comprised three populations(BDW,BSF and NLT),accounting for13.04％,ex-hibiting substantial flower color variation and dominated by orange-red.Correlation analysis between flower color traits and geographic factors revealed that L*,b*,C*and h were highly significantly positively correlated with lati-tude,whereas no significant correlations were found between L*,a*,b*,C*,h and either altitude or longitude.This study confirmed that under the influence of latitude,flower color phenotypes of natural T.iliensis populations within the sampling area are diverse,exhibiting rich variation.