Abstract
Reblooming daylily (Hemerocallis spp.), which blooms twice in a growing season, can significantly extend the florescence. However, the lack of genetic information about reblooming character resulted in the limitation for breeding. According to the North Carolina Design II (NC II), sixteen F1 populations were generated from the artificial pollination of eight reblooming parents. The results showed that foliage traits got more significant promotion than floral traits over both parents. H. ‘Early and Often’ (FM3) and H. ‘K2005001’ (M2) were considered as the ideal parents, based on the estimation of general combining ability (GCA). H. ‘Boothbay Harbor Gold’ × H. ‘Sagamore Bob Pelletier’ (FM1 × M1) had the largest special combining ability (SCA) value, becoming the greatest potential hybrid population. Leaf length and flower diameter had the largest broad-sense heritability (0.930) and narrow-sense heritability (0.763), respectively. Reblooming was significantly related to leaf number, making it possible to obtain rebloomers by selecting individuals with more leaves in the vegetative stage.
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