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Comparison of Root Characters among Cultivated Potatoes (Solanum tuberosum) and Their Wild Relatives

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Title: Comparison of Root Characters among Cultivated Potatoes (Solanum tuberosum) and Their Wild Relatives
Other Titles: バレイショ栽培種の根の諸形質の比較
Authors: Iwama, Kazuto1 Browse this author
Nishibe, Sachio2 Browse this author
Authors(alt): 岩間, 和人1
西部, 幸男2
Keywords: 根重
根長
栽培種
根形態
根呼吸活性
根表面積
バレイショ
野生種
potato
root DW
root lenght
root morphology
root respiration rate
root surface area
solanum tuberosum
wild relatives
Issue Date: 5-Mar-1989
Publisher: 日本作物学会
Journal Title: 日本作物學會紀事
Volume: 58
Issue: 1
Start Page: 126
End Page: 132
Abstract: バレイショの野生種を利用して, 栽培種の根の特性を育種的に改良するために, 基本的情報として栽培品種および系統12種と野生種8種における根の形態, 呼吸活性, 乾物重, 長さおよび表面積を開花期に圃場条件下で比較した. 野生種は栽培品種および系統に比べ, 根の平均直径が細く, また根の乾物率が高い特性を示した. また, 根のモノリスの観察から, 分枝根の数と太さと長さに供試材料間で顕著な差異を認めた. 根重当たりおよび根長当たりのいずれにおいても根の呼吸活性は, 栽培品種のほうが野生種よりも高い値を示した. 幾つかの野生種は, 栽培品種および系統に比べ, 根重, 根長, 根表面積および葉重に対する根重の割合において顕著に大きな値を示した. 本実験の結果から, 野生種と栽培種との交配により, 根の特性に関して大きな遺伝的変異を示す後代が得られるものと予想され, 野生種は栽培種の根の特性の育種的改良に寄与することが示唆された.
In order to obtain basic information regarding improvement of potato root characters through breeding using its wild relatives, morphology, respiration activity, dry weight (DW), length and surface area of the roots of 12 potato cultivars and lines and 8 wild relatives (Table 1) were investigated during the flowering stage under field conditions. The roots of the wild potato species were thinner but their dry matter percentages were higher than those of the cultivars and lines (Table 2). From observation of root monoliths (Fig. 1), it appeared that the number, diameter and length of the lateral roots differed among the materials (species) used. The cultivars exhibited relatively high root respiration rata compared to the wild species on the basis of either root DW or root length (Table 2). Some wild species had a considerably larger root DW, root length and root surface area, and higher ratio of root DW to leaf DW than the cultivars and lines (Table 2 and 3). From the results it can be seen that some wild species have good potential to be used as parents in the breeding for the improvement of root characters in potato.
Type: article
URI: http://hdl.handle.net/2115/47013
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 岩間 和人

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