|Title:||Somaclonal Resistance in Cavendish Banana to Fusarium Wilt||Other Titles:||華蕉體細胞變異之抗黃葉病選種||Authors:||Shin-Chuan Hwang
|Keywords:||banana;Fusarium wilt;disease resistance;香蕉;香蕉黃葉病;抗病||Issue Date:||Jun-1991||Publisher:||農業試驗所||Start page/Pages:||124-132||Conference:||土壤病原生態與防治研討會專刊||Abstract:||
Somaclonal variants of Giant Cavendish derived from meristem culture were used for screening for resistance to fusarium wilt caused by Fusarium oxysporum f. sp. cubense Race 4. As a result of this screening program, 9 somaclones showing resistant reaction had been obtained. Four of them (GCTCV-44, -104, -105, -119) were highly resistant to the disease, while the others (GCTCV-46, -53, -62, -201, -215) were. moderately resistant. Somaclones with high level of resistance had a percentage of disease incidence of less than 10% and those with moderate level of resistance had 11-30%, compared with over 70% in Giant Cavendish. All resistant clones differed from the parent, Giant Cavendish, by possessing combinations of inferior agronomic characters. Improved variants were obtained from a large planting in the field of plantlets of these resistant clones. The majority of improved variants retained wilt resistance. GCTCV-215-1 appears to be the most promising resistant variety because of having both acceptable horticultural characteristics and marketable fruit qualities. Disease incidence of GCTCV-215-1 was 17.2% when 2-month-old plantlets were used as planting material and it was 5.2% for suckers, compared with about 75% in Giant Cavendish. Plantlets of GCTCV-2154 had been planted in 700 ha of infested banana fields during the period of March-May 1990 for further evaluation of the stability of disease resistance under a wide range of environmental conditions.
從北蕉（Giant Cavendish）之組織培養變異品系（Somaclonal variant）篩選已獲
得9個品系對香蕉黃葉病病原菌（Fusarium oxysporum f. sp. cubense race 4）具有抗病性，其中4個品系（GCfCV-44，-104，-105，-119）呈高度抗病性，於重病蕉園測定其平均發病率低於10%;5個品系（GCTCV-46，-53，-62，-201，-215）呈中度抗病性，其平均發病率介於11~30％之間；對照一般北蕉之發病率為70％以上。所有抗病品系均帶有不良的園藝變異性狀，從其大量種植之後代植株中可尋獲改良型品系。大多數改良型品系仍維持與原母系相同的抗病程度。田間試種結果顯示改良型品系之中以GCTCV-215-1之園藝性狀及香蕉產量品質較為理想，具有推廣種植潛力。在重病蕉園種植GCTCV-215-1組織培養苗之發病率為17.2%，吸芽苗之發病率為5,2%，對照一般北蕉之發病率為75％。79年3~5月期間於本省中南部香蕉黃葉病區種植GCTCV-215-1之組織培養苗700公頃，俾進一步探討其種植在不同環境條件下之抗病穩定程度。
|Appears in Collections:||植物病理組|
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