八重咲きユリ‘ダブリン’の形態特性

らかにすることで，これまでとは異なる観点から緑

色花の育種目標を提案することができるのではない

かと考えられる．

₂．栄養器官の形態

草丈は，‘イエローウィン’では86.6 cm，緑色

八重咲き‘ダブリン’では76.0 cm，黄色八重咲き

‘ダブリン’では81.2 cm であり，₃系統間で有意

差は認められなかった（p ＞0.05）

（Table3）

．葉数

は‘イエローウィン’では約102枚，緑色八重咲き

‘ダブリン’では約93枚，黄色八重咲き‘ダブリ

ン’では約91枚であり，₃系統間で有意差は認めら

れなかった（p ＞0.05）

（Table3）

．さらに，葉の縦

横比はイエローウィン’では6.4，緑色八重咲き

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かった（p ＞0.05）

（Table3）

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36

信州大学農学部 AFC 報告 第18号 （2020）

Morphological Characteristics of Double-Flowered Lily, ‘Doubleenʼ and Derived Mutant

Takuya FUKASAWA and Yoshikuni KITAMURA

Graduate School of Science and Technology, Shinshu University

Summary

In the present study, we identified the morphological characteristics of green colored double-flowered

lily ʻDoubleenʼ (original ‘Doubleenʼ), a mutant of oriental-trumpet hybrid (OT hybrid) lily ‘Yelloweenʼ. Yellowcolored double-flowered mutant (YC ‘Doubleenʼ) derived from ‘Doubleenʼ was also studied. YC ‘Doubleenʼ

has both green unexpanded tepals and yellow expanded tepals, whereas original ‘Doubleenʼ has only green

unexpanded tepals. The morphologies of vegetative organs and reproductive organs were compared among

‘Yelloweenʼ, original ‘Doubleenʼ, and YC ‘Doubleenʼ. YC ‘Doubleenʼ had staminoid organs and carpeloid

organs. On the other hand, original ‘Doubleenʼ did not have stamen and carpel, and shoot apical meristems

were maintained in flowers. Mean numbers of tepals were 6, 80, and 46 for ‘Yelloweenʼ, original ‘Doubleenʼ

and YC ‘Doubleenʼ, respectively, and the differences were significant among 3 strains. Original ‘Doubleenʼ

and YC ‘Doubleenʼ had green tepals, however ‘Yelloweenʼ did not. Chromaticity and epidermal cell density

showed significant differences between yellow tepals of ‘Yelloweenʼ and green tepals of original ‘Doubleenʼ.

Those of original ‘Doubleenʼ were almost equal to those of young tepals sampled from 100 mm-length flower

buds of ‘Yelloweenʼ before anthesis. Although the distinct morphologies of reproductive organs were

observed among ‘Yelloweenʼ, original ‘Doubleenʼ, and YC ‘Doubleenʼ, no difference was found for vegetative

organs such as plant height, the number of leaves, and length / width ratio of leaf among 3 strains.

Key Words: ‘Doubleen', double-flower, green flower, lily, morphological observation

...