Nishio Nursing College, Nishio, Aichi, Japan.
J Plant Res. 2010 Sep;123(5):639-44. doi: 10.1007/s10265-009-0296-7. Epub 2010 Jan 16.
Although ferns have been developed by hybridization and chromosome doubling, no natural polyploidy has yet been recorded in Osmundaceae. So, we produced hybrids artificially by crosses between Osmunda banksiifolia (2n = 2x = 44) and Osmunda lancea (2n = 2x = 44), and investigated their sporogenesis. From the O. banksiifolia x O. lancea hybrid with 44 univalent chromosomes, allotetraploids with 44 bivalent chromosomes were produced by chromosome doubling, and allotriploids with 22 univalent chromosomes and 22 bivalent chromosomes were then produced by back crosses. The results show when and how chromosome doubling occurs in hybrids. The success of artificial hybridization between O. banksiifolia and O. lancea, did not, however, reflect any product of natural hybridization between the two species.
虽然凤尾蕨属植物已经通过杂交和染色体加倍得到了发展，但在紫萁科中尚未记录到自然多倍体。因此，我们通过交尾将凤尾蕨（2n = 2x = 44）和紫萁（2n = 2x = 44）之间的杂交来人工产生杂种，并研究了它们的孢子发生。从具有 44 个单价体染色体的凤尾蕨属×紫萁杂种中，通过染色体加倍产生了具有 44 个二价体染色体的异源四倍体，然后通过回交产生了具有 22 个单价体染色体和 22 个二价体染色体的异源三倍体。结果表明了在杂种中染色体加倍的时间和方式。然而，凤尾蕨和紫萁之间的人工杂交的成功并不能反映这两个物种之间自然杂交的任何产物。
