Demographic Genetics of Some Japanese Liliaceous Species

日本百合花（Erythronium japonicum Decne）五种大田居群的种群遗传结构。，贝母koidzumiana Ohwi（都是典型的多角近交多年生植物），心梗（Thunb.）牧野（含变种glehni (Fr. Schm.)）在本州富山县的几个地方调查了单核多年生植物Hara、无梗Disporum D. Don和单核伪一年生植物Disporum smilacimum a . Gray。基于单位样地中每个单株的叶面积，对所有5种植物的种群大小级结构进行了调查。然后，用等电聚焦法对各种群的过氧化物酶同工酶谱进行分析。在pH 3.5 ~ 9.6范围内检测到的所有过氧化物酶条带均采用不相似指数进行分析。日本赤霉（Erythronium japonicum）和小贝母（beltilaria koidzumiana）野生种群的d.i值呈典型的正态曲线，而通过产生子珠进行无性繁殖的心梗（Cardiocrinum cordatum）种群的d.i值呈偏态分布。另一方面，在种群结构上完全不同的单果假一年生植物——绢金（Disporum smilacinum），其D.I值的分布格局极为偏斜。所有这些不同的植物种群的人口-遗传结构在很大程度上是由特定物种的繁殖方法（主要是两性生殖还是无融合生殖）和繁殖系统（主要是近亲繁殖还是近亲繁殖）决定的。

The demographic-genetic structures of field populations of five Japanese liliaceous species, i.e., Erythronium japonicum Decne., Fritillaria koidzumiana Ohwi (both typical polycarpic outbreeding perennials), Cardiocrinum cordatum (Thunb.) Makino (incl. var. glehni (Fr. Schm.) Hara) (a monocarpic perennial), Disporum sessile D. Don and Disporum smilacimum A. Gray (both monocarpic pseudo-annuals), were investigated in several localities of Toyama Prefecture, Honshu. For all five species, size-class structures of populations were investigated based on the leaf area of each individual plant present in the unit-sampling plots. Then, peroxydase isozyme patterns of each population were analyzed by the isoelectric focusing method using a thin plate of ampholine. All peroxydase bands which were detected in a pH range of 3.5 to 9.6 of ampholine were analyzed based on the dissimilarity index.Typical normal curves of the D.I. values were obtained from wild populations of Erythronium japonicum and Fritillaria koidzumiana, whereas a somewhat skewed distribution pattern was detected in those of Cardiocrinum cordatum, which propagates vegetatively by producing daughter bulblets. On the other hand, Disporum smilacinum, a monocarpic pseudo-annual with entirely different population structures, exhibited exceedingly skewed distribution patterns of the D.I values.All such different demographic-genetic structures of plant populations are most strongly determined by the method of reproduction (whether predominantly amphimictic or apomictic) and by the breeding system (whether predominantly outbreeding or inbreeding) of the particular species in question.