Towards the development of a Cavendish banana resistant to race 4 of fusarium wilt: gamma irradiation of micropropagated Dwarf Parfitt (Musa spp., AAA group, Cavendish subgroup)

Abstract

‘Dwarf Parfitt’, an extra-dwarf Cavendish cultivar with resistance to subtropical race 4 Fusarium oxysporum f. sp. cubense (Foc), was gamma irradiated at a dose of 20 Gy and putative mutants were recovered with improved agronomic characteristics. Further screening of putative mutants for improved yield and fruit size, as well as a degree of resistance to fusarium wilt, led to the selection of a line (DPM25) with improved productivity when grown on soils infested with subtropical race 4 Foc. DPM25 was equal to the industry standard, ‘Williams’, in every agronomic trait measured and it consistently showed a lower incidence of fusarium wilt. Further improvement of field resistance to race 4 Foc is needed in DPM25 and further cycles of mutation induction and selection is an option discussed.

Field Performance and RAPD Analysis of Gamma-Irradiated Variants of Banana Cultivar ‘Giant Cavendish’ (AAA)

“…Combining gamma irradiation with in vitro culture has also been effective for the induction of mutations in banana (Smith et al, 2005). For example, Smith et al (2006) employed gamma irradiation of a dwarf 'Cavendish' cultivar for improvement in agronomic characteristics.…”

Pineapple–banana rotation reduced the amount of Fusarium oxysporum more than maize–banana rotation mainly through modulating fungal communities

“…cubense race 4 (FOC). Globally, several methods to control the disease have been investigated, including resistance crop breeding (Smith et al, 2006), application of chemical fungicides (Nel et al, 2007), biological control using antagonistic microbes (Wang et al, 2013), and crop rotation (Huang et al, 2012;Zhang et al, 2013). Among all management practices, crop rotation, in general, is highly efficient and environmentally friendly (Krupinsky et al, 2002).…”

RESPON TANAMAN LADA (PIPER NIGRUML) VARIETAS CIINTEN TERHADAP IRADIASI SINAR GAMMA / Respons of Gamma Irradiation on Black Pepper (Piper nigrum L.) Ciinten Variety

“…Hasil ini sesuai dengan penelitian tebu (SUHESTI, 2015), mutan yang berada pada LD20 dan LD50 memberikan peluang diperolehnya mutan putatif yang mempunyai toleransi kekeringan lebih baik dibanding tetua asalnya. Perlakuan iradiasi sinar gamma juga telah dikembangkan pada tanaman pisang untuk menghasilkan pisang resisten penyakit layu Fusarium (SMITH et al, 2006), tanaman pepaya (Carica papaya L.) resisten penyakit ring spot virus (CHAN, 2009b), untuk mendapatkan tanaman mangga (Mangifera indica L.) resisten Antracnose (LITZ, 2009). Kedelapan belas mutan putatif lada varietas Ciinten ini diharapkan menjadi varietas unggul dengan penelitian lebih lanjut di rumah kaca dan di lapang untuk mengetahui potensi produksi dan mutunya.…”