<Original Paper>Cytological Studies on Selfed Plants and Interspecific Crosses Produced in Four Species of Genus Lycoris (Amaryllidaceae)

概要

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Self-pollination and interspecific hybridization were carried out in Lycoris sanguinea, L. sprengeri, L. squamigera and L. radiata. Through embryo rescue for obtaining more progenies, selfed plants were obtained in three species and hybrid plants were obtained from five interspecific crosses. Most selfed plants raised from diploid species were diploid with the same karyotype as the parent, but three S_1 plants obtained from L. sprengeri (2n=22A) were found to be two triploids with 2n=33A and one aneuploid with 2n=32 (31A+1M). All selfed plants raised from triploid species, L. radiata, were aneuploid with chromosome number near to the diploid taxon, L. radiata var. pumila. Hybrid plants derived from interspecific hybridization between diploid species were all diploids. However, various aneuploids were frequently occurred in the hybrids between triploid and diploid species. Those results suggested that interspecific hybridization between triploid and diploid species would become an effective breeding method for increasing the character variation in the genus Lycoris.
大阪府立大学の論文
2000-03-31