고추약한모틀바이러스 병원형 P1,2 및 P1,2,3 생물검정을 통한 저항성 고추유전자원 선발
Resistance Screening of Capsicum Germplasm to Pepper Mild Mottle Virus (PMMoV) Pathotypes P1,2 and P1,2,3
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초록
Pepper mild mottle virus (PMMoV), a member of the genus Tobamovirus, is one of the most threatening pathogens affecting commercial pepper production, and it is classified into pathotypes P1,2 and P1,2,3. As chemical and physical treatments show limited success in controlling PMMoV, resistant pepper varieties are considered the most effective means of disease control. Two hundred pepper germplasms, including 167 accessions of Capsicum chinense and 5 reference accessions known as resistant L alleles, were assessed using a bioassay to select germplasms resistant to PMMoV. Six accessions, including IT261210, were resistant to both PMMoV pathotypes P1,2 and P1,2,3 as they developed necrotic local lesions only on inoculated leaves, whereas no symptoms were observed on the upper leaves. Moreover, RT-PCR results of the upper leaves of these accessions were also negative. Thus, the identified accessions may be a novel source of genetic resistance against present or emerging new pathotypes and may be useful for differentiating L alleles.
Abstract
Pepper mild mottle virus (PMMoV), a member of the genus Tobamovirus, is one of the most threatening pathogens affecting commercial pepper production, and it is classified into pathotypes P1,2 and P1,2,3. As chemical and physical treatments show limited success in controlling PMMoV, resistant pepper varieties are considered the most effective means of disease control. Two hundred pepper germplasms, including 167 accessions of Capsicum chinense and 5 reference accessions known as resistant L alleles, were assessed using a bioassay to select germplasms resistant to PMMoV. Six accessions, including IT261210, were resistant to both PMMoV pathotypes P1,2 and P1,2,3 as they developed necrotic local lesions only on inoculated leaves, whereas no symptoms were observed on the upper leaves. Moreover, RT-PCR results of the upper leaves of these accessions were also negative. Thus, the identified accessions may be a novel source of genetic resistance against present or emerging new pathotypes and may be useful for differentiating L alleles.
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