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タイトルヨミ
ニホン サン ヒルムシロゾク ショクブツ ノ サイボウガクテキ ケンキュウ
日本語以外のタイトル
Cytological Studies in Genus Potamogeton of Japan
ファイル
言語
英語
著者
田草川 春重
内容記述(抄録等)
1. The plants which were used as materials in the present investigation are 26 species and 6 formae of Potamogeton.
2. The chromosomes numbers determined by the author are as folloes : Potamogeton orientalis (2n=26), P. sibiricus (2n=28), P. zosterifolium (2n=28), P. porsildiorum (2n=28), P. cristatus (2n=28), P. miduhikimo (2n=28), P. limosellifolius (2n=28), P. asiaticus (2n=28), P. Fauriei (2n=27), P. Kamogawaensis (2n=27), P. numasakianus (2n=28), P. Friyeri (2n=42), P. subsessiliofolius (2n=42), P. torquatus (2n=42), P. miyakezimaensis (2n=52), P. subfluitans (2n=52), P. teganumensis (2n=52), P. leptocephalus (2n=52), P. anguillanus (2n=52), P. Tepperi (2n=52), P. Francheii (2n=52), P. longipetiolatus (2n=52), P. alatus (2n=52), P. polygonifolius (2n=52), P. malainoides (2n=52), P. grameans (2n=52), P. morongii (2n=52), P. Tenuifolius (2n=52), P, filiformis (2n=78), P. vaginatus (2n=78), P. flabellatus (2n=78).
In the following 17 species the reports of other investigations are confirmed by the author: P. oxyphyllus (2n=26), P. panormitanus (2n=26), P. pusillus (2n=26), P. monoginus (2n=28), P. vaseyi (2n=28), P. apertus (2n=42), P. malianus (2n=52), P. dentatus (2n=52), P. nipponicus (2n=52), P. perfoliatus (2n=52), P. crispus (2n=52), P. praelongus (2n=52), P. Maackianus (2n=52), P. biwaensis (2n=52), P. distinctus (2n=52), P. natans (2n=52), and P. pectinatus (2n=78).
The karyotypes and meiosis in all these species were observed. Moreover, some interspeciecific hybrids were cytologically studied.
3. From the view point of phylogeny and cytology, the species of this genus studied can be classified into two groups : (a) the 7 chromosomic group, (b) the 13 chromosomic group.
The following species being to the 7 chromosomic group: P. monoginus, P. crispus, P. vaseyi and P. numasakianus are tetraploid (2n=28), while P. apertus and P. Friyeri are hexaploid (2n=42).
The following species belong to the 13 chromosomic group : P. oxyphyllus, P. panormitanus, P. pusillus and P. orientalis are 2n=26. while P. fluitanus, P. malaianus, P. dentatus, P. nipponicus, P. perfoliatus, P. crispus, P. praelongus, P. Maackianus, P. biwaensis, P. alpinus, P. anguillanus, P. distinctus and P. natans have 2n=52 chromosomes.
4. The following species are interspecific hybrids : P Fauriei. P. orientalis P. numasakianus, P. biwaensis, P. malainoides, P. anguillanus, and P. nipponicus. In these interspecific hybrids, the irregularities in the meiosis, such as the occurrence of univalents, lagging of some univalents in the anaphase, and formation of restitution nuclei and dwarf nuclei, ets. are found to a greater or less extent.
掲載誌名
島根農科大学研究報告
9
開始ページ
(A-1)237-269
ISSN
05598311
発行日
1961-03-31
NCID
AN00108241
出版者
島根農科大学
出版者別表記
The Shimane Agricultural College
資料タイプ
紀要論文
部局
生物資源科学部
備考
A,Bを含む
開学十周年記念号(Commemoration Number for the 10th Anniversary)
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