Cross-compatibility between Quercus mongolica var. grosseserrata and Quercus dentata and both the reproductive ability and flowering time of their interspecific hybrids

Ubukata M., Itahana N., Kohono K.

doi:10.11519/jjfs1953.81.4_286

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Other Title

ミズナラとカシワの交雑和合性および種間雑種における繁殖能力と開花時期
ミズナラトカシワノコウザツワゴウセイオヨビシュカンザッシュニオケルハンショクノウリョクトカイカジキ
Cross‐compatibility between Quercus mongolica var. grosseserrata and Quercus dentata and both the reproductive ability and flowering time of their interspecific hybrids

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Abstract

In order to understand more fully the cross-compatibility among Quercus species, artificial pollination of Q. dentata (female)×Q. mongolica var. grosseserrata (male) was carried out. Also, reproduc-tive ability, blooming time, and cross-compatibility between the parental species were examined with ten-year old (approx.) hybrid trees of Q. mongolica var. grosseserrata×Q. dentata. Mature acorns were obtained in the artificial pollination of Q. dentate×Q. mongolica var. grosseserrata. It was found that ten-year old (approx.) hybrid trees of Q. mongolica var. grosseserrata×Q. dentata had the ability to produce normal pollen grains and acorns, and that the germination rate of pollen grains and acorns did not differ when compared with those of intraspecific crossings of Q. mongolica var. grosseserrata. The current-year seedlings from the former were higher than those from the latter. It was also found that this hybrid trees produced mature acorns by backcrossing with the parental species. As the interspecific hybrids of Q. mongolica var. grosseserrata and Q. dentata overlapped in blooming time with the parental species, it is suggested that they could be easily crossed with the parental species in natural conditions.

Journal

JOURNAL OF THE JAPANESE FORESTRY SOCIETY

JOURNAL OF THE JAPANESE FORESTRY SOCIETY 81 (4), 286-290, 1999

THE JAPANESE FORESTRY SOCIETY

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