Flower Color of Hybrids Raised from Interspecific Crosses between Ivy-leaved Geranium (<i>Pelargonium peltatum</i> (L.) L’Hér. ex Ait.) and Related Species

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  • アイビーゼラニウム（<i>Pelargonium peltatum</i>（L.）L’Hér. ex Ait.）とその近縁種とのF<sub>1</sub>個体における花色
  • アイビーゼラニウム(Pelargonium peltatum (L.) L'Her. ex Ait.)とその近縁種とのF₁個体における花色
  • アイビーゼラニウム(Pelargonium peltatum (L.) L'Her. ex Ait.)ト ソノ キンエンシュ ト ノ F ₁ コタイ ニ オケル ハナイロ

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Abstract

To develop a yellow-flowered ivy-leaved geranium, reciprocal crosses between Pelargonium peltatum and P. quinquelobatum, a species that produces pale yellow-green flowers, were performed. Seeds were obtained when P. peltatum was used as the pollen donor (3.3 seeds per fruit). The flower color of F1 plants varied from cream to extremely pale purple. Regarding cream flowers, the yellowish tone was paler on the adaxial surface of the petals compared with that on the abaxial surface. Ovule culture was performed for the cross P. × hortorum × P. peltatum, which aimed to expand the purple color palette of the flower. A total of 337 shoots were regenerated from 175 ovules, and 12 plants flowered after acclimatization. In many of these plants, the purple pigmentation of the petals was equal to that of P. peltatum. The highest malvidin content was 91%. Seven F1 plants showed high pollen fertility. These F1 plants are suitable for use as breeding material to produce promising new yellow- and purple-flowered ivy-leaved cultivars.

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