Hibiscus属植物に関する研究-2-

概要

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1) On the way of breeding new ornamental types in Hibiscus, intra- and interspecific crosses were made with 8 different species in 1952_??_1954 at the Botanical Garden of Osaka City University, Kisaichi near Osaka City, Japan. 2) Intraspecific cross. i) H. syriacus showed remarkable self-sterility or self-incompatibility. Namely, very few capsules without seeds were got by self-pollination, but the crosses betweeen different races produced capsules at high rates containing numerous fertile seeds. ii) In H. coccineus, about 50% of self-and inter-racial pollination yielded capsules with fertile seeds. The inability of pollen seems to be respon-sible for this low fertility. iii) Self-incompatibility. was not found in H. mutabilis, H. Hamabo, H. Moscheutos, H. Trionum and H. cannabinus. Self-pollination in these species always resulted in high fertility. 3) Interspecific cross. i) About 30 different combinations between 8 species were tested, but most of them yielded no, seeds as shown in Table 9. ii) In all the combinations, having H. Haatabo as mother plant, capsules were produced but con-tained no seeds. iii) Only three combinations, H. mutabilis×H. Moscheutos, H. coccineus×H. Moscheutos, and H. Moscheutos×H. coccineus, produeed fertile: seeds. On the F1 and F2 plants, anotherr report-isnow in preparation.
園芸学会の論文