The Present Status of Hybridity among the Pteridophytes
Irving W. Knobloch
|Volume or Term/Year and Month of Publication||
18卷1期（1973 / 06 / 01）
29 - 34
Hybrids are known in 62 out of the 270 recognized genera of ferns and fern allies. To date 552 pteridophyte hybrids have been recorded in literature.The hybrids known to occur in 55 genera are discussed, out of 253 whose chromosomes were counted 29 were diploids, 129 were triploids, 76 tetraploids, 14 pentaploids and 5 hexaploids, in other words almost 90% were polyploids.Of the 255 spores studied 84% were sterile, but 16% were fertile.
生物農學 > 動物學
生物農學 > 生物環境與多樣性