Time filter

Source Type

Molina A.B.,International Rice Research Institute | Sinohin V.O.,International Rice Research Institute | Fabregar E.G.,Lapanday Foods Corporation | Ramillete E.B.,Lapanday Foods Corporation | And 2 more authors.
Acta Horticulturae | Year: 2016

Recent epidemics of Fusarium wilt, caused by the virulent strain tropical race 4 (TR4) of Fusarium oxysporum f. sp. cubense (Foc), pose a serious threat to the banana industry. Four Cavendish (AAA genome) somaclonal variants selections from Taiwan (GCTCV-105, GCTCV-119, GCTCV-218 and GCTCV-219) and three important Philippine local cultivars [Latundan (AAB genome, Silk subgroup), Lakatan (AAA genome, Lakatan subgroup) and Saba (ABB genome, Saba subgroup)], were compared to the commercial Cavendish Grand Naine (AAA genome, Cavendish subgroup) in a heavily Foc-infested soil in the southern Philippines. Experimental plots were planted with 10 tissue culture-derived seedlings, replicated 10 times, and arranged in a completely randomized design. Disease incidence was assessed weekly by monitoring early symptoms of yellowing of older leaves and/or other symptoms such as pseudostem splitting. Onset of disease symptoms was recorded. The infected plants were allowed to develop severe typical symptoms of Fusarium wilt (leaves showing clear yellowing, and marginal necroses appear on older leaves) and then checked for vascular necroses as confirmation. The commercially-grown cultivars Grand Naine and Lakatan showed susceptibility with a disease incidence of 64 and 76%, respectively, in the primary crop; and 79 and 92%, respectively in the ratoon crop. Disease incidence in the GCTCV cultivars ranged from 0-6% in the primary crop and 0-8% in the ratoon crop. Saba showed 0% incidence in the primary as well as in the ratoon crop. Foc VCG 01213/16, the Foc strain associated with TR4, was confirmed in the infected plants using a Polymerase Chain Reaction (PCR)-based diagnostic tool. Results confirm the stability of resistant somaclones to Foc TR4, even in agroecosystems differing from those where these were first developed. They also show that selecting favorable somaclonal variants is a feasible approach in cultivar improvement, and they have a potential role in integrated Foc TR4 management. The study identifies the TR4-resistant cultivar Saba, showing that TR4 does not severely affect all cultivars.


Yip M.-K.,Academia Sinica, Taiwan | Lee S.-W.,Taiwan Banana Research Institute | Su K.-C.,Academia Sinica, Taiwan | Lin Y.-H.,Academia Sinica, Taiwan | And 2 more authors.
Plant Biotechnology Reports | Year: 2011

This study describes an efficient protocol for Agrobacterium tumefaciens-mediated transformation of two subgroups of genotype AAA bananas (Musa acuminata cv. Pei Chiao and Musa acuminata cv. Gros Michel). Instead of using suspension cells, cauliflower-like bud clumps, also known as multiple bud clumps (MBC), were induced from sucker buds on MS medium containing N6-Benzylaminopurine (BA), Thidiazuron (TDZ), and Paclobutrazol (PP333). Bud slices were co-cultivated with A. tumefaciens C58C1 or EHA105 that carry a plasmid containing Arabidopsis root-type ferredoxin gene (Atfd3) and a plant ferredoxin-like protein (pflp) gene, respectively. These two strains showed differences in transformation efficiency. The EHA105 strain was more sensitive in Pei Chiao, 51. 3% bud slices were pflp-transformed, and 12. 6% slices were Atfd3-transformed. Gros Michel was susceptible to C58C1 and the transformation efficiency is 4. 4% for pflp and 13. 1% for Atfd3. Additionally, gene integration of the putative pflp was confirmed by Southern blot. Resulting from the pathogen inoculation assay, we found that the pflp transgenic banana exhibited resistance to Fusarium oxysporum f. sp. cubense tropical race 4. This protocol is highly advantageous to banana cultivars that have difficulties in setting up suspension cultures for the purpose of quality improvement through genetic transformation. In addition, this protocol would save at least 6 months in obtaining explants for transformation and reduce labor for weekly subculture in embryogenic cell suspension culture systems. © 2011 Korean Society for Plant Biotechnology and Springer.


Li M.H.,South China Agricultural University | Yang B.,University of Hawaii at Manoa | Leng Y.,North Dakota State University | Chao C.P.,Taiwan Banana Research Institute | And 4 more authors.
Canadian Journal of Plant Pathology | Year: 2011

Fusarium wilt of banana (Musa spp.), caused by Fusarium oxysporum f. sp. cubense (Foc), is one of the most important banana diseases. Three races (1, 2, 4) of Foc have been identified worldwide, but race 4 (especially tropical race 4, TR4) is the most destructive pathogen and has significant impacts on banana production in Taiwan and Southern China. To characterize the genetic relationship of Foc in these two regions, 55 isolates of Foc, including 18 from Taiwan and 37 from Hainan and Guangdong Provinces, were subjected to pathogenicity tests, race 4-specific polymerase chain reaction (PCR) diagnosis, and amplified fragment length polymorphism (AFLP) analysis. One race 4 isolate from Australia, one race 1 isolate from Philippines, and 10 non-banana F. oxysporum isolates were also included in the study for comparison. Pathogenicity tests indicated that 16 and 21 isolates of Foc from Taiwan and Southern China, respectively, were pathogenic on Cavendish banana and classified as race 4, and the remaining isolates were identified as race 1. PCR amplification with race 4 and tropical race 4-specific primers confirmed that all of the race 4 isolates from Taiwan and Southern China were TR4. AFLP analysis with eight EcoRI-MseI primer combinations clustered the 67 F. oxysporum isolates analyzed into two major groups, one containing all race 4 isolates and the other consisting of race 1 isolates along with the non-banana F. oxysporum isolates. No significant divergence was observed among TR4 isolates from Southern China and Taiwan, suggesting that the TR4 isolates from Southern China might share the same lineage as those from Taiwan. © 2011 The Canadian Phytopathological Society.


Ho Y.-N.,National Chung Hsing University | Chiang H.-M.,National Chung Hsing University | Chao C.-P.,Taiwan Banana Research Institute | Su C.-C.,Taiwan Banana Research Institute | And 4 more authors.
Plant and Soil | Year: 2014

Aim: Fusarium wilt (Panama disease) caused by Fusarium oxysporum f. sp. cubense tropical race 4 (Foc TR4) is a soilborne disease that severely devastates the banana industry worldwide. We aimed to isolate beneficial endophytic bacterial strains against Panama disease.Methods: From different plant species, including reeds (Phragmites australis), vetiver grass (Chrysopogon zizanioides), and banana plants (Cavendish cv. Pei-Chiao, Cavendish cv. Formosana, and Musa sapientum cv. Rose), endophytes were screened and characterized. The diversity and community of endophytes within banana plants were analyzed by PCR-denaturing gradient gel electrophoresis (DGGE). The banana tissue culture plantlets were inoculated with the candidate endophyte, Burkholderia cenocepacia 869T2, and effects of in planta biocontrol were observed.Results: Endophytic B. cenocepacia 869T2 decreased the disease incidence of Fusarium wilt on treated banana plants to 3.4 %, comparing to 24.5 % of non-inoculated plants infected in the field test within a 7-month period. Furthermore, significant growth promoting of 869T2 inoculated banana plants was observed in field experiments.Conclusions: In addition to 869T2 genomic sequence data, our results suggest that the pyrrolnitrin and pyrroloquinoline quinone potential producer, B. cenocepacia 869T2, is a good biological control agent (BCA) for use in the biocontrol of Fusarium wilt and plant promotion. © 2014, Springer International Publishing Switzerland.


Lin Y.-H.,National Chung Hsing University | Su C.-C.,Taiwan Banana Research Institute | Chao C.-P.,Taiwan Banana Research Institute | Chen C.-Y.,National Chung Hsing University | And 3 more authors.
European Journal of Plant Pathology | Year: 2013

The Fusarium genus causes devastating plant diseases worldwide, in which Fusarium oxysporum is the most serious crop pathogen. Disease monitoring is the basis of integrated pest management of any disease. The lack of rapid, accurate, and reliable device to detect and identify plant pathogens is one of the main limitations in integrated disease management. This study describes an efficient and quantifiable diagnosis method for the specific detection of F. oxysporum f. sp. cubense (Foc) race 4 in field-infected banana. With the optimized PCR parameters using the SCAR (sequence characterized amplified region) primers FocSc-1/FocSc-2 and a real-time PCR strategy, the developed method showed high reproducibility and was very sensitive to detect extremely low quantities of Foc genomic DNA (gDNA). We also found that Foc gDNA in severely symptomatic banana pseudostems and leaves were 6946-fold and 26. 69-fold more than in those of mild-symptomatic banana, respectively. © 2012 KNPV.


Chang C.M.,Taiwan Banana Research Institute | Chao C.P.,Taiwan Banana Research Institute | Huang S.N.,Taiwan Banana Research Institute | Chiang S.C.,Taiwan Banana Research Institute
Acta Horticulturae | Year: 2011

Organic banana farming is an alternative to conventional banana production in Chinese Taipei. Results from a 10-year study on organic banana production at the organic farm of the Taiwan Banana Research Institute (TBRI) indicate that average incidence of Fusarium wilt for four Cavendish cultivars was 25.7% for the organic farming system, as compared to 66.9% for the conventional farming system. The lower incidence of Fusarium wilt in the organic system was considered to be associated with a positive change in the properties of the soil. Horticultural parameters at shooting did not show significant differences between organic and conventional banana, except for a lower number of healthy leaves in the organic banana. No differences in the post-harvest quality could be found between organic and conventional banana. A smaller bunch weight was recorded for the organic banana; however, more harvested bunches resulted in a higher overall yield in the organic farming system. Promotion of the organic farming system for adoption by more banana growers could enhance the sustainability of the Chinese Taipei banana industry.


Lee S.Y.,Taiwan Banana Research Institute | Su Y.U.,Taiwan Banana Research Institute | Chou C.S.,Taiwan Banana Research Institute | Liu C.C.,Taiwan Banana Research Institute | And 2 more authors.
Acta Horticulturae | Year: 2011

The exploitation of somaclonal variation is an efficient approach to select improved Cavendish-type banana cultivars with superior horticultural traits and resistance to Fusarium wilt, caused by Fusarium oxysporum f. sp. cubense race 4 (Foc race 4) in Chinese Taipei. 'TC3-1035', an improved somaclonal variant of 'Tai-Chiao No. 3', was selected and released as a new banana cultivar 'Tai-Chiao No. 5' in 2007. It inherited the semi-dwarf status and moderate resistance to Foc race 4 of 'Tai-Chiao No. 3', but not the susceptibility to flower thrips, Thrips hawaiiensis, at shooting stage. It also has a higher yield potential. Under suitable field management, plant height of 'Tai-Chiao No. 5' is 2.7 m, and its fruit size, shape and yield capacity are as good as those of 'Pei-Chiao', which is the most widely planted Cavendish cultivar in Chinese Taipei. During the 7-year consecutive evaluation trials, Fusarium wilt incidence in 'Tai-Chiao No. 5' plants was 5-25% whereas 10-50% plants were affected in 'Pei-Chiao' established in the same infested plot. This is an indication of the stable resistance of 'Tai-Chiao No. 5' to Foc race 4. With additional benefit of easy ripening and good eating quality, 'Tai-Chiao No. 5' is now well accepted, both in the local and Japanese market. Currently, a total of 0.9 million tissue-culture plantlets, about 450 ha, have been released to banana growers in Chinese Taipei.

Loading Taiwan Banana Research Institute collaborators
Loading Taiwan Banana Research Institute collaborators