A Chrysanthemum Breeding for Year-round Production in Thailand
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Abstract
A chrysanthemum breeding for year-round production in Thailand was conducted. In this study five chrysanthemum genotypes were used, including one genotype that could flowering in long day condition (PI), and four genotypes that could not flowering in long day condition (PS1, PS2, PS3, PS4). The reciprocal crosses between PI group and PS group were done. The result showed that the crosses between PI x PS2 showed the highest embryo regenerated percentage (46%) while the crosses between PS4 x PI showed the lowest embryo regenerated percentage (6%). The reciprocal crosses showed that the using PI as female parent gave higher embryo regenerated percentage than used as male parent. The investigation of flowering traits of offspring found that only sixty-one (61) genotypes from two hundred one (201) could flowering in long day condition in both on-season and off-season growing. The PS4 x PI showed the highest flowering percentage (66.7%) whereas the PS3 x PI showed the lowest flowering percentage (12.5%). From this study, nine offspring genotypes which could flowering in long-day condition with good performance in flower and plant characteristics for commercial purpose can be selected. In addition, three genotypes B1, B2 and E1 showed good performance earliest-flowering (70 day after transplanting)
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