Evaluation of Rapeseed Genotypes against Alternaria Blight under Field Conditions in Nawalparasi-West, Nepal

IF 0.5 Q4 AGRONOMY Journal of Agriculture and Environment for International Development Pub Date : 2022-06-30 DOI:10.3126/aej.v23i1.46865

S. Bhandari, S. Shrestha, H. Manandhar, B. Bhattarai, L. Aryal

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Abstract

Alternaria blight disease causes both yield and quality loss in Brassica crops. A field evaluation of ten rapeseed genotypes against Alternaria blight disease was conducted during November 2018 to February 2019 in Parasi, Nawalparasi-west district. Experiment was laid out in a randomized complete block design with individual plot size of 2.25 m2 with three replications. Post-harvest in-vitro seed infection test was done in a completely randomized design with four replications. Disease scoring was done as percentage of leaf area and pod infection on individual 15 sample plants per plot at seven days intervals. Genotype ICT 2001-35 was found moderately resistant based on categorization of mean leaf AUDPC (308.52) and mean pod infection AUDPC values (391.48) with low seed infection (12.50%). Preeti, Bikash and Pragati showed highly susceptible reactions to both leaf blight and pod infection. Therefore, genotype ICT 2001-35 could be used in a varietal improvement program for disease resistance against Alternaria blight.

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尼泊尔Nawalparasi-West油菜抗白疫病基因型田间评价

油菜白叶枯病造成了油菜产量和品质的双重损失。2018年11月至2019年2月，在Nawalparasi-west区Parasi对10种油菜籽基因型进行了抗疫病的田间评价。试验采用完全随机区组设计，小区面积2.25 m2，设3个重复。采后体外种子侵染试验采用完全随机设计，共4个重复。每隔7天对每块15株样品进行叶面积百分比和荚果侵染率评分。基因型ICT 2001-35的叶片平均AUDPC值为308.52，荚果平均侵染AUDPC值为391.48，种子侵染较低(12.50%)。Preeti、Bikash和Pragati对叶枯病和荚果侵染均表现出高度敏感反应。因此，基因型ICT 2001-35可用于品种改良计划，以对抗白叶枯病。

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来源期刊

Journal of Agriculture and Environment for International Development AGRONOMY-

CiteScore

1.00

自引率

0.00%

发文量

审稿时长

16 weeks

期刊介绍： The Journal of Agriculture and Environment for International Development is an international, multidisciplinary journal dealing with agricultural production, food security, environment, remote sensing and natural resources evaluation, economics and social science, rural development and soil science. The Journal publishes scientific, technical and extensional papers concerning activities devoted to Developing Countries and Countries in transition. The language of the Journal is English. Starting from 2015, papers in other languages will not be accepted.