Correlation of saponin content and Fusarium resistance in hybrids from different ploidy levels of Lilium Oriental |
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| Authors: | Wu-Lin Liu Li-Fang Wu Hong-Zhi Wu Si-Xiang Zheng Ji-Hua Wang Fei-Hu Liu |
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| Affiliation: | 1. Faculty of Life Sciences, Yunnan University, 2 North Cuihu Lake Road, Kunming 650091, China;2. Flowers Research Institute, Yunnan Academy of Agricultural Science, Kunming 650205, China;3. College of Horticulture and Landscape, Yunnan Agricultural University, Kunming 650201, China;4. Horticultural Research Institute, Guizhou Academy of Agricultural Science, Guiyang 550006, China |
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| Abstract: | Lilium Oriental is of great commercial value, but large losses in production can result from its susceptibility to diseases caused by Fusarium ssp. Here we report a mutant of Lilium Oriental resistant to Fusarium, Cai-74, which was generated from crossing tetraploid (from ‘Star fighter’) and diploid (‘Cor. Amore’ × ‘Acapulco’) plants. Hybrid progeny were screened via inoculating Fusarium oxysporum into tissue cultured plantlets in a greenhouse. Although Cai-74 had a saponin content of 3.81 mg g−1, which is much higher than its parents, the highly Fusarium-resistant wild species Lilium dauricum had the highest content of 4.11 mg g−1 among the tested genotypes. Cai-74 had a 3A karyotype rather than 3B found in normal plants of Lilium Oriental. Taken together, our results suggest that Cai-74 bears a chromosomal variation in its structure, and that the saponin content in the lily scales correlate with the Fusarium resistance of Lilium Oriental. Cai-74 could be used as a gene resource for breeding Fusarium-resistant cultivars of Lilium Oriental. |
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| Keywords: | Fusarium resistance Karyotype variation Lilium Oriental Saponin Hybrid Ploidy |
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