* 梶田　忠　TADASHI KAJITA [#b59529c6]

**研究テーマ [#udd2ac14]
#ref(http://bean.bio.chiba-u.jp/eng/index.php?plugin=ref&page=Kajita&src=ipomoea.jpg,around,right)
***汎熱帯海流散布植物の系統地理学的研究 [#g570c518]
>　汎熱帯海流散布植物とは海流を利用して種子などの散布体を運ばせることにより，全世界の熱帯域に分布を広げた植物である．代表的な植物には，グンパイヒルガオ，ナガミハマナタマメ，オオハマボウなどがある．1種の植物が熱帯域で地球を一周するような特異な分布パターンを獲得するに至った過程と，極めて広い分布域の中で種を維持するために必要な必要な遺伝子交流の程度を，葉緑体DNAと核DNAの塩基配列による解析やフラグメント解析（AFLP、マイクロサテライト）などの手法を用いて明らかにしようとしている．


***マメ科植物の系統分類学的研究 [#nee169fb]
>　マメ科は種子植物のうち3番目に大きな科で，多くの有用植物を含んでいる．マメ科全体を広くカバーするようなサンプルを用いて，葉緑体DNAのrbcL遺伝子の塩基配列による系統解析を行い，分子データとそれ以外の形質によって推定される系統関係を比較した．得られた結果から，マメ科全体の分類体系について問題点を指摘し，今後の研究の方向性を示した．また，全世界の熱帯域から温帯域にかけて分布する約400種からなるヌスビトハギ連の植物についても同様の研究を行った．
**授業 [#xc5987be]
>　授業関係ページを見て下さい。
**梶田個人ページ [#hbdb06dd]
***学歴 [#h2bc260c]
> 1989年(H元) 東北大学理学部卒業
> 1994年(H6）東北大学大学院理学研究科博士後期課程修了
> 1994年(H6）東北大学大学院理学研究科研究生
> 1996年(H8）九州大学理学部研究生

***職歴 [#uf8eede1]
> 1997年(H9)　東京大学大学院理学系研究科附属植物園助手
> 2004年(H16)　千葉大学理学部助教授
> 2007年(H19年）千葉大学大学院理学研究科准教授

***[[日誌>http://bean.bio.chiba-u.jp/diario/]] [#ee3efd5f]

***最近の業績 [#u88c282a]
- Wee, A.K.S., Takayama, K., Asakawa T., Thompson, B., Onrizal, Sungkaew, S., Tung, N.X., Saleh, N., Soe, K. K., Tan, H.T.W.,, Watano, Y., Baba, S., Kajita, T., Webb, E.L. Oceanic currents, not land masses, maintain the genetic structure of mangrove Rhizophora mucronata Lam. (Rhizophoraceae) in Southeast Asia. Journal of Biogoegraphy. (accepted). Wiely. 2013.~

- Tomizawa, Y., Shinmura, Y., Wee, A.K.S. ,Takayama, K., Asakawa, T., Yllano, O., Salmo III, Ardli, E., Tung, N., Malekal, N., Onrizal,  Meenakshisundaram, S., Sungkaew, S.,.Nazre Saleh, Adjie, B., Soe, KK., Oguri, E., Murakami, N., Watano, Y., Baba, S., Webb, E., Kajita, T. Development of 11 polymorphic microsatellite markers for Xylocarpus granatum (Meliaceae) using next-generation sequencing technology. Conservation Genetics Resources, (in press). Springer. 2013.~
- Takayama, K., M. Tamura, Y. Tateishi, E. Webb and T. Kajita. Strong genetic structure over the American continents and transoceanic dispersal in red mangroves Rhizophora (Rhizophoraceae), revealed by broad-scale nuclear and chloroplast DNA analysis. American Journal of Botany. 100(6): 1191-1201. Botanical Society of America. 2013.~
- Wee, A.K.S., K. Takayama, T. Kajita and E.L. Webb. "Microsatellite loci for Avicennia alba (Avicenniaceae), Sonneratia alba (Lythraceae) and Rhizophora mucronata (Rhizophoraceae)." Journal of Tropical Forest Science. 25(1): 1-8. FRIM.  2013.~
- Shinmura, Y, A.K.S. Wee, K. Takayama, S.H. Meenakshisundaram, T. Asakawa, Onrizal, B. Adjie, E.R Ardli, S. Sungkaew, N.B. Malekal, N.X. Tung, S.G. Salmo III, O.B. Yllano, M.N. Saleh, K.K. Soe, E. Oguri, N. Murakami, Y. Watano, S. Baba, E.L. Webb and T. Kajita. "Isolation and characterization of 14 microsatellite markers for Rhizophora mucronata (Rhizophoraceae) and their potential use in range-wide population studies." Conservation Genetics Resources. Springer. 4(4): 951-954. 2012. ~
- Shinmura, Y., A.K.S. Wee, K. Takayama, T. Asakawa, O.B. Yllano, S.G. Salmo III, E.R. Ardli, N.X. Tung, N.B. Malekal, Onrizal, S.H. Meenakshisundaram, S. Sungkaew, M.N. Saleh, B. Adjie, K.K. Soe, E. Oguri, N. Murakami, Y. Watano, S. Baba, E.L. Webb, and T. Kajita. "Development and characterization of 15 polymorphic microsatellite loci in Sonneratia alba (Lythraceae) using next-generation sequencing. " Conservation Genetics Resources. Springer. 4:811-814. 2012. ~
- Takayama, K, M. Tamura, J. Ono, Y. Tateishi and T. Kajita. "Isolation and characterization of microsatellite loci in the large-leafed mangrove Bruguiera gymnorhiza." In Permanent genetic resource note, Molecular Ecology Resources. Wiley. 11: 219-222. 2011.~
- Takayama, K, M. Tamura, Y. Tateishi and T. Kajita. "Isolation and characterization of microsatellite loci in a mangrove species, Rhizophora stylosa (Rhizophoraceae)." Conservation Genetics Resources. Springer. 11:301-310. 2010.~
- Minobe, S., S. Fukui, R. Saiki, T. Kajita, S. Changtragoon, A.N. Ab Shukor, A. Latiff, B.R. Ramesh, O. Koizumi, T. Yamazaki. "Highly differentiated population structure of a Mangrove species, Bruguiera gymnorhiza (Rhizophoraceae) revealed by one nuclear GapCp and one chloroplast intergenic spacer trnF–trnL." Conservation Genetics. Springer. 11:301-310. 2009.~
- Takayama, K., M. Tamura, Y. Tateishi and T. Kajita. "Isolation and characterization of microsatellite loci in the red mangrove Rhizophora mangle (Rhizophoraceae) and its related species." Conservation Genetics. Springer. 9: 1323-1325. 2008.~
- Takayama, K., Y. Tateishi, J. Murata and T. Kajita. "Gene flow and population subdivision in a pantropical plant with sea-drifted seeds Hibiscus tiliaceus and its allied species: evidence from microsatellite analyses." Molecular Ecology. Wiley. 17: 2730-2742. 2008~
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//Takayama K, Kajita T, Murata J, and Tateishi Y.  2006.
//Isolation and characterization of microsatellites in the sea hibiscus (Hibiscus tiliaceus  L., Malvaceae) and related hibiscus species.  Molecular Ecology Note. 6:721-723.
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//Takayama K, Kajita T, Murata J, and Tateishi Y. 2006.
//Phylogeography and genetic structure of Hibiscus tiliaceus ﾑ speciation of a pantropical plant with sea-drifted seeds.  Molecular Ecology. Molecular Ecology. 15(10):2871-2881.
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//Kajita, T. 2006.
//Phylogeography of Asian PlantsﾑInternational Symposium on Asian Plant Diversity and Systematics. TAXON 55(1): 8.
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//Watanabe K, Kajita T, and Murata J. 2006.
//Chloroplast DNA variation and geographical structure of the Aristolochia kaempferi group (Aristolochiaceae).  Am. J. Bot. ; 93: 442-453.
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//Kenicer GJ, Kajita T, Pennington RT, Murata J.  2005.
//Systematics and biogeography of Lathyrus (Leguminosae) based on internal transcribed spacer and cpDNA sequence data. American Journal of Botany 92: 1199-1209.
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//Ohi T, Kajita T, Murata J. 2003
//Distinct geographic structure as evidenced by chloroplast DNA haplotypes and ploidy level in Japanese Aucuba (Aucubaceae). American Journal of Botany 90: 1646 - 1653.
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//Kajita T, Tsumura Y  2003
//Molecular phylogeny of Dipterocarpaceae. In Okuda T et al (eds.), Pasoh: Ecology of a Lowland Rain Forest in Southeast Asia. Springer-Verlag Tokyo, pp 261-271
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//Kajita, T., H. Ohashi, Y.Tateishi, C. D. Bailey and J. J. Doyle. 2001
//RbcL and legume phylogeny, with particular reference to Phaseoleae, Millettieae, and allies. Systematic Botany 26(3): 515-536.
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//Kajita T. and H. Ohashi. 2001. Infraspecific restriction site variation in the chloroplast DNA of Desmodium podocarpum DC. (Leguminosae - Papilionoideae).  Journ. Jap. Bot.  76(2): 77-83.


**連絡先 [#zc97855a]
-梶田 &ref(授業/tk.gif);