Journal of Emerging Trends in Engineering and Applied Sciences: Research Areas

Article Title: Response Of F1 Progeny And Their Parents To Papaya Ringspot Virus- W (PRSV-W) In Pumpkin
by Fatema Begum, A.MannanAkanda, Md. A. T. Masud, Md. ArifHossain

Abstract:
Papaya ringspot virus- W (PRSV-W) is one of the serious virus caused disease in pumpkin which affects leaves and also fruits in particular. A study was undertaken to develop a Papaya ringspotdisease resistant hybrid in pumpkin at the Dept. of Plant Pathology during 2012-2013. As a first step, twenty nine germplasm lines maintained in the Dept. of Plant Pathology were evaluated for disease resistant. After seeing the disease response, germplasm lines were graded and hand pollination was done to get resistant F1 progeny. Then some selected lines were used both as male (testers) and lines as female parents and 13 hybrids were obtained. All these hybrids were tested for the performance of yield, quality and disease resistance. An experiment was conducted of 13 hybrids and their 13 parents at the experimental field of Bangabandhu Sheikh MujiburRahman Agricultural University (BSMRAU), Salna, Gazipur, to assess their response to PRSV-W disease under inoculated condition during November 2012 to May 2013. The mean performance of growth, yield and yield contributing character of F1 progenycompared to parents in all cases showed better performances which was positive to select resistant hybrids. Of this population Hybrid 1, Hybrid 2 and Hybrid 11 exhibited increased resistance (0.0% disease incidence) exceeding their parental lines. Disease incidence was the parameters used to determine the resistance of population. The test genotypes varied significantly for their response to disease incidence (P=0.000). Three hybrids (Hybrid 1, Hybrid 2 and Hybrid 11) for disease incidence demonstrated higher level of resistance. These entries can be released as Hybrid variety for PRSV-W resistance. Based on our results and previous literatures, disease incidence is an appropriate parameter for assessing the resistance of the genotypes to PRSV-W. Disease incidence inversely affects the plant growth and yield parameter as significant negative correlation (P<0.05) exists between them. Significant relationship between disease incidence of the genotypes and plant growth suggested observed resistance of the genotypes was genetically controlled

Keywords: Response, F1Progeny and Their parents, PRSV-W, Pumpkin

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