Abstract
For the purpose of overcoming interspecific hybrid sterility in Lilium, the following methods were attempted: 1) Further use of embryo culture in the cross of F1 and 2) Use of amphidiploids induced from F1. When F1 hybrids were used as female parents, embryos were developed in 0-3.4% of their ovules. A total of 134 seedlings from nine backcross (or the similar cross) combinations were obtained through embryo culture. A seedling from the cross of F1 as male parent flowered and proved to be a triploid. Amphidiploids could be used as pollen donors and eight B1 plants were produced from the cross of the amphidiploid of L. longiflorum×L. henryi.Three new interspecific hybrids in Lilium produced by embryo culture were introduced.
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