14 赤松品種に関する研究(第1報) : アカマツ針葉の変異に関する調査

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This repport is the result of comparison among the variation of Pinus densiflora SIEB. et ZUCC. needle. The experimental trees are 23 years old and 8 9 monthes old : the former are planted in the museum garden of Kyoto University (Kamigamo, Kyoto), and the latter are planted in the nursery of Saikyo University (Simogamo, Kyoto). The summary of results are follows. 1. The experimental seeds are collected from 31 districts, in Japan. As a tentative plan, we divided them into 12 locality, as Fig. 1. 2. The external morphological comparison of needles showed on the Table 1. and Fig. 2. 3. The variation of resin ducts in needle are compared on the middle part crosssection. Fig. 3. shows the 12 forms of resin ducts : I type are originally belonged Pinus Thunbergii PARL, and P. densiflora normaly has only II or III type. And yet the result of the research, like Table 2,several sections, show the tendency to P. Thunbergii. 4. The interspecies hybrid between P. densiflora and P. Thunbergii has been already known, but by the result of our research, we have to think that the hybrids exist more than we have thought. (cf. Table 4.) 5. The relation between development of resin duct and the resistance to the harm of Coleoptera is an interesting problem. But we have had yet no data to solve it. 6. As Table 3,in 24 years old part, the number of stoma is abundant in north-east part of Japan, decrease south-west. It is considerd, that the number of stoma has some relation to the climate, especially moisture. But we have yet no completed data. 7. After all the Local-races Landsorten of Cryptomeria japonica D. DON are well known, but of Pinns densiflora are not yet made clear. However as above-mentioned, from the result of our research ; Pinus densiflora has some common characters among different districts.
一般社団法人日本森林学会の論文
1951-02-25

14 赤松品種に関する研究(第1報) : アカマツ針葉の変異に関する調査

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