title: AFLP studies on downy-mildew-resistant and downy-mildew-susceptible genotypes of opium poppy.
abstract: Downy mildew (DM) caused by Peronospora arborescens, is a serious disease in opium poppy (Papaver somniferum), which has a world-wide spread. The establishment of DM-resistant cultivars appears to be a sustainable way to control the In this paper, we present the results of a study aimed at the identification of amplified fragment length polymorphism (AFLP) markers for DM-resistance in opium poppy. Three opium poppy genotypes (inbred over about 10 years): Pps-1 (DM-resistant), Jawahar-16 (DM-susceptible) and H-9 (DM-susceptible) were crossed in a diallel manner and the F(1) progeny along with the parents were subjected to AFLP analysis of chloroplast (cp) and nuclear DNA with seven and nine EcoRI / MseI primer combinations, respectively. cpDNA AFLP analysis identified 24 Pps-1 (DM-resistant)-specific unique fragments that were found to be maternally inherited in both the crosses, Pps-1 x Jawahar-16 and Pps-1 x H-9. In the case of nuclear DNA AFLP analysis, it was found that 17 fragments inherited from Pps-1 were common to the reciprocal crosses of both (i) Pps-1 and Jawahar-16 as well as (ii) Pps-1 and H-9. This is the first molecular investigation on the identification of polymorphism between DM-resistant and DM-susceptible opium poppy genotypes and development of DM-resistant opium poppy genotypespecific AFLP markers. These AFLP markers could be used in future genetic studies for analysis of linkage to the downy mildew resistance trait.
authors.affiliation: Genetics and Plant Breeding Division, Central Institute ofMedicinal and Aromatic Plants (CSIR), P.O. CIMAP, Lucknow 226 015, India.
authors.forename: Mukesh K
authors.initials: MK
authors.lastname: Dubey
authors.forename: Ajit K
authors.initials: AK
authors.lastname: Shasany
authors.forename: Om P
authors.initials: OP
authors.lastname: Dhawan
authors.forename: Ashutosh K
authors.initials: AK
authors.lastname: Shukla
authors.forename: Suman P S
authors.initials: SP
authors.lastname: Khanuja
mesh_terms: D054458:Amplified Fragment Length Polymorphism Analysis / Q000379:methods*; D002467:Cell Nucleus / Q000235:genetics; D003433:Crosses, Genetic; D005231:Fatty Acids, Unsaturated / Q000235:genetics; D005819:Genetic Markers; D005838:Genotype; D006824:Hybridization, Genetic; D007113:Immunity, Innate / Q000235:genetics*; D040582:Inheritance Patterns / Q000235:genetics; D009892:Opium; D010207:Papaver / Q000235:genetics* / Q000276:immunology / Q000469:parasitology*; D044742:Peronospora / Q000502:physiology*; D010935:Plant Diseases / Q000235:genetics* / Q000276:immunology* / Q000469:parasitology
chemical_list: D005231:Fatty Acids, Unsaturated; D005819:Genetic Markers; C055648:9-(4-chlorophenyl)-7,7-dimethyl-5,8-nonadienoic acid; D009892:Opium