Abstract

AbstractOdd‐allotetraploid lily, such as ‘Honesty’ (LAAA), is a new type of allotetraploids. However, there has been no report on how to breed odd‐allotetraploid lily cultivars so far. According to their genomic composition, such as LAAA, we proposed LA × AAAA and LALA × AAAA would be two ways to breed them since LA lily could produce a small amount of 2n gametes and LALA could produce a large amount of normal 2x gametes. In the present study, an interploid cross, LA × AAAA, was made and its five seedlings were analysed using genomic in situ hybridization. Four of them were odd‐allotetraploid, one was near odd‐allotetraploid. Their intergenomic variations caused by 2n eggs increased the chance of selecting new cultivars. It was concluded that the interploid cross was a promising way to breed odd‐allotetraploid lilies with high genetic variations at chromosome levels.

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