著者

塩谷 格 川瀬 恒男

出版者

Japanese Society of Breeding

雑誌

育種学雑誌 (ISSN:05363683)

巻号頁・発行日

vol.39, no.1, pp.57-66, 1989-03-01 (Released:2008-04-18)

参考文献数

21

被引用文献数

39 47

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サツマイモに最も近縁な種Ipomoea trifidaは二倍体から六倍体をふくむ倍数体複合種である.I. trifidaの二倍体(K221,B1B1,2n=30)と四倍体(K223,B2B2B2B2,2n=60)をもちいて合成した六倍体(SH,2n=90)は,サツマイモ(2n=6x=90)と同じゲノム構成B1B1B2B2B2B2をもつとされている. I. trifidaの自然三倍体(K222,2n=45)の相互交雑よつ生じた誘導六倍体(DH,2n=90)および自然六倍体(K123,2n=90)のゲノム構造を明らかにするため,DH,K123,SH,サツマイモの間のF1雑種,またそれらの戻し交雑(BC1)と復交雑の後代植物の減数分裂・第一分裂中期の染色体体合を観察した.これら六倍体には1ゲノムが4重になっている部分があると推察された.そこで,両親のもつ4重ゲノム間の相同性を確かめるため,BC,や複交雑からの後代をも供試された(表1).その結果,誘導六倍体と自然六倍体K123は,合成六倍体やサツマイモと同じゲノム構造をもつことが判明した(表3).

著者

伊藤 由紀子 塩谷 格

出版者

日本花粉学会

雑誌

日本花粉学会会誌 (ISSN:03871851)

巻号頁・発行日

vol.52, no.1, pp.5-13, 2006

参考文献数

30

被引用文献数

4

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Grass pollinosis has been on the increase over the last 15 years, and it is now urgent that our allergy clinic can identify the sources of airborne antigenic pollens. The aim of this study has been to determine the sources of grass pollen during spring and early summer. Pollen size measurements were taken from twenty grass species that are frequently seen blooming from April to June in Mie Prefecture. The median values of the airborne grass pollens were compared with the pollen size for the grass species we examined. We set a 90% confidence ellipse area for each species, or group of species, and compared individual airborne pollen grains for whether they were within the set confidence areas or not, according to their probability distance (D^2 value). The median values of airborne pollens for 2002 were 35.0 and 30.0μm for the major and minor axis, respectively, and 32.5 and 30.0μm for 2003 and 2004. Among the grass pollen species examined, we were able to select four species as the most likely pollen sources, as their pollen sizes are nearly equal to the set median values. Two areas of the 90% confidence ellipse; one for the Dactylis glomerata and another for the group of Festuca arundinacea, Lolium multiflorum and L. perenne were set for testing. The airborne pollens within either of the two confidence areas were at least 75% for each of the years studied. These results suggest that the main sources of airborne grass pollen during spring and early summer are these four grass species.