ISHS Acta Horticulturae 275: International Symposium on the Culture of Subtropical and Tropical Fruits and Crops
SELECTION OF IMPROVED CAVENDISH BANANA MUTANTS RESISTANT TO RACE 4 OF FUSARIUM OXYSPORUM F. SP. CUBENSE |
| Authors: | S.C. Hwang, W.H. Ko |
| Abstract:
About 0.2–10.1% of banana plants grown from plantlets of 6 Giant Cavendish mutants, resistant to race 4 of Fusarium oxysporum f. sp. cubense, had improved agronomic characteristics and produced bunches bigger than those produced by their respective resistant parent. Of 4 clones tested, the improved variants of GCTCV-44, -53, and -119 retained a similar level of resistance to fusarial wilt as their parents, while that of GCTCV-40 lost its resistance to wilt. In a large-scale field trial involving 20 ha planted at various locations, disease incidence of GCTCV-44-1, -53-1, and -119-1 averaged 1.1, 6.3, and 3.9%, respectively, compared to 60.9% of normal Giant Cavendish. The appearance of these variants differed distinctively from that of the normal plant, and none of them has yet achieved the standard of the normal plant in agronomic characteristics. More recently, a resistant mutant, designated as GCTCV-215-1, also obtained from plantlets of Giant Cavendish, had ideal agronomic characteristics, productivity, and fruit quality. Mass propagation of GCTCV-215-1 for commercial planting in infested banana plantations in Taiwan is in progress. | |
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