西北牡丹品种瓣基色斑形态的初步研究

Basal Blotch Morphology in the Petal of the Northwest Peony Cultivars

西北牡丹品种群是中国牡丹栽培品种中极富特色的品种群,所有品种的花瓣基部都有色斑。实地调查中发现,这些色斑在位置、大小、颜色、形状等方面存在丰富的变异,现结合文献资料,对这些变异进行整理分析。色斑的位置有基部和离基2种情况;颜色以棕红色、紫红色、棕色、黑紫色等紫黑色系居多;色斑的大小按其高度占花瓣的高度比例可分为特大型、大型、中型和小型4种;形状有卵形、椭圆形、圆形等10种。对色斑的描述可按照颜色、大小、形状的顺序。此外,色斑透背与否及雄蕊瓣化瓣上的白色条纹等都有很大的变化,这些特点极大地提升了西北牡丹品种花朵的观赏性。

The northwest peony cultivars are very unique among numerous cultlvar groups m tmma. All me cutivars have blotches on the base of petals. According to the field survey and then referring to documents, the author find the blotches varies very much in position, size, color and morphology. There are two positions of the blotches： close to the base and depart from the base. The colors of the blotches are mainly brown-red, purple, brown, black-purple. The size of the blotches, according to the proportion of their heights relative to that of petals＇, can be divided into four types： very large, large, medium and small. And the morphology of the blotches have ten types such as ovate, oblong and circle etc. The blotches can be described in order of color, size and morphology. Besides, the blotch bleed-through or not and the white lines on the center of the petaloid stamens are all in rich variation. All of the above greatly promote the flower ornamental characteristics of the northwest peony cultivars.