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Title: Breeding Gladiolus (Gladiolus Grandiflorus Hort.) For Resistance To Fusarium Wilt Disease
Authors: T, Manjunath Rao
C, Aswath
N, Ramachandran
Keywords: Gladiolus
Issue Date: 2009
Citation: T.Manjunath Rao, C.Aswath and N. Ramachandran. 2009. Breeding gladiolus (Gladiolus Grandiflorus Hort.) for resistance to Fusarium wilt. International Conference on Horticulture for Livelihood Security and Economic Growth, Bangalore, November 9-12.
Abstract: Gladiolus (Gladiolus grandiflorus Hort.) is one of the important bulbous ornamental crops grown commercially for cut flower and for bedding in many parts of the world. In India it is mainly grown for cut flower in commercial cultivation of gladiolus a wilt disease caused by Fusarium oxysporum f. sp. gladioli causes severe economic losses to the farmers. In order to overcome this problem in commercial cultivation, hybridization was done involving different parental combinations to develop resistant cultivars. Variability for resistance to wilt disease was observed among the cultivars/hybrids selections. The hybrid selections were initially screened under field conditions and then field resistant ones were subjected to artificial inoculation with Fusarium oxysporum f. sp. gladioli Race 1. Five genotypes viz., Hybrid Selection IIHRG 8, IIHRG 10, IIHRG 11, Pink Friendship and Psiittacinus hybrid was screened against Fusarium wilt disease based on foliar symptoms. Among the genotypes evaluated, the lowest (3.33%) incidence of disease was noticed in hybrid selection IIHRG 11 whereas the cultivar 'Pink Friendship' had the highest (86.67%) disease incidence. These genotypes were evaluated for different traits and there was a significant difference among the genotypes. The promising hybrid selections that showed resistance also have attractive floral traits. After maturity corms were harvested and stored. When the corms were ready for planting they were screened for corm rotting due to Fusarium. The percentages of healthy corms were more in hybrid selection IIHRG 11 (96.23%) and in hybrid selection IIHRG 10 (94.44%). Maximum corm rot was in cultivar 'Pink Friendship' (81.82%). Usually farmers use lot of fungicides to control the disease, which in turn results in environmental pollution and also increase the production cost. Thus new Gladiolus selections have a great potential in eco friendly farming and also helps in increasing the profitability to the farmers.
URI: http://hdl.handle.net/123456789/168
Appears in Collections:Ornamental Crops

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