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ID 47687
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Pericarp Characteristics of the F(1) Hybrid Medium-Fruited Tomato between the Male Sterile Mutant (T-4) of the Large-Fruited 'First' and a Small-Fruited Pure Line with Soft Pericarp
Author
Toya, Junko
Abstract
Breeding for a soft pericarp in medium-sized tomato fruit was conducted by crossing the male sterile mutant (T-4) of the large-fruited 'First' and a small-fruited pure line with a soft pericarp (S). Pericarp characteristics of the F(1) hybrid (named MS-II) were compared with the parents and two similar medium-fruited tomato cultivars, 'Red ore' and 'Frutica'. Pericarp firmness in MS-II was lower as compared with that of both T-4 and S. Differences in pericarp firmness among MS-II, 'Red ore' and 'Frutica' were dependent on truss. In the first truss, MS-II developed fruits with a softer pericarp than 'Red ore', but with a firmer pericarp than 'Frutica'. In the second and third trusses, pericarp firmness of the fruit in MS-II tended to be lower than those of the other two cultivars. The thickness of the exocarp cuticle in MS-II was lower than that in 'Red ore', but was no different to that in 'Frutica'. Thus genotypic differences in pericarp firmness among MS-II, 'Red ore' and 'Frutica' seem to be derived from differences in the degree of cutin development in the epidermal perimeter. A thinner cuticle can explain pericarp softness in the fruits above the second truss in MS-II.
Abstract Alternative
薄皮果柔の中玉トマト品種育成を目的とし,‘ファースト’花粉非崩壊型雄性不稔系統 (T-4) を種子親,果皮の軟らかい小果固定系統 (S) を花粉親とするF(1)雑種 (MS-II) の特性について,両親系統および既存の中玉F(1)品種‘レッドオーレ’,‘フルティカ’のそれと比較した.両親系統と比較したところ,MS-IIの果実硬度は花粉親である軟果皮Sと同等となり,果皮硬度はSよりも低い値となった.3段摘心栽培において,MS-IIの果実硬度は第1段では2品種と差は無かったが,上位果房ほど両品種よりも低くなる傾向を示した.果皮硬度は,第1果房では‘レッドオーレ’よりも低く,‘フルティカ’よりも高かったが,上位果房ほど両品種よりも低い値となる傾向を示した.MS-IIの外果皮におけるクチクラ厚を測定したところ,‘フルティカ’と同等となり,‘レッドオーレ’よりも低かった.また,MS-IIのクチクラ層の発達程度が2品種よりも低いことが観察され,MS-IIの果皮硬度が2品種よりも低い傾向を示すのは,外果皮におけるクチクラ層の発達程度が低いためと推測された.
Keywords
cuticle
fruit firmness
pericarp firmness
Note
原著論文 (Original paper)
Published Date
2012-02-01
Publication Title
岡山大学農学部学術報告
Publication Title Alternative
Scientific Reports of the Faculty of Agriculture Okayama University
Volume
volume101
Publisher
岡山大学農学部
Publisher Alternative
Faculty of Agriculture, Okayama University
Start Page
19
End Page
24
ISSN
2186-7755
Content Type
Departmental Bulletin Paper
language
日本語
File Version
publisher
Refereed
False
Eprints Journal Name
srfa