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Fakrudin Bashasab,Vijaykumar,Krishnareddy Bayyareddy Kambalapally,Mahaling Shrishailappa Kuruvinashetti,Basavaraj Veeranagouda Patil 한국응용곤충학회 2007 Journal of Asia-Pacific Entomology Vol.10 No.1
Morphometric characterization of twelve geographic populations of cotton bollworm, Helicoverpa armigera occurring in south Indian cotton ecosystems was done at larval, pupal and adult stages over three cropping seasons. Traits such as length and weight of larvae, pupa and length and width of the wing, length of fore-, mid- and hind femur, male reproductive organ-length of genital capsule, valves, and ejaculatory duct, female reproductive organ-length of appendix bursae and ductus bursae at adult stage were measured across three years. Populations significantly differed for most of the traits studied. It was evident that populations from northern parts recorded higher phenotypic attributes compared to those from southern parts of south Indian cotton ecosystem. Besides larval, pupal and adult external phenotypic traits, attributes of male reproductive organ viz., length of genital capsule, valves, and ejaculatory duct and female reproductive organ viz., length of appendix bursae and ductus bursae differed significantly among populations. Information on population structure and differences based on morphometry would be useful in better understanding of population dynamics and management of this pest in cotton and other crops in south India.
Bashasab Fakrudin,Vijaykumar Vijaykumar,Kambalapally Krishnareddy Bayyareddy,Kuruvinashetti Mahaling Shrishailappa,Patil Basavaraj Veeranagouda Korean Society of Applied Entomology 2007 Journal of Asia-Pacific Entomology Vol.10 No.1
Morphometric characterization of twelve geographic populations of cotton bollworm, Helicoverpa armigera occurring in south Indian cotton ecosystems was done at larval, pupal and adult stages over three cropping seasons. Traits such as length and weight of larvae, pupa and length and width of the wing, length of fore-, mid- and hind femur, male reproductive organ-length of genital capsule, valves, and ejaculatory duct, female reproductive organ-length of appendix bursae and ductus bursae at adult stage were measured across three years. Populations significantly differed for most of the traits studied. It was evident that populations from northern parts recorded higher phenotypic attributes compared to those from southern parts of south Indian cotton ecosystem. Besides larval, pupal and adult external phenotypic traits, attributes of male reproductive organ viz., length of genital capsule, valves, and ejaculatory duct and female reproductive organ viz., length of appendix bursae and ductus bursae differed significantly among populations. Information on population structure and differences based on morphometry would be useful in better understanding of population dynamics and management of this pest in cotton and other crops in south India.
Bashasab, Rajkumar, Fakrudin,Kuruvinashetti, Mahaling S The Korean Society of Plant Pathology 2007 Plant Pathology Journal Vol.23 No.2
Genetic diversity among selected isolates of Macrophomina phaseolina, a causal agent of charcoal rot (stalk rot) disease in sorghum was studied using PCR-RAPD markers. A set of ten isolates, from ten different rabi sorghum genotypes representing two traditional sorghum growing situations viz., Dharwad- a transitional high rainfall region and Bijapur- a semi-arid low rainfall region in South India. From a set of 40 random primers tested, amplicon profiles of 15 were reproducible. A total of 149 amplicon levels, with an average of 9.9 bands per primer, were available for analysis, of which 148 were polymorphic (99.3%). It was possible to discriminate all the isolates with any of the 15 primers employed. UPGMA clustering of data indicated that the isolates shared varied levels of genetic similarity within a range of 0.14 to 0.72 similarity coefficient index and it was suggestive that grouping of isolates was not related to sampling location in anyway. A high level of genetic heterogeneity of 0.28 was recorded among the isolates.
Rajkumar,Fakrudin Bashasab,Mahaling S Kuruvinashetti 한국식물병리학회 2007 Plant Pathology Journal Vol.23 No.2
Genetic diversity among selected isolates of Macrophomina phaseolina, a causal agent of charcoal rot (stalk rot) disease in sorghum was studied using PCRRAPD markers. A set of ten isolates, from ten different rabi sorghum genotypes representing two traditional sorghum growing situations viz., Dharwad- a transitional high rainfall region and Bijapur- a semi-arid low rainfall region in South India. From a set of 40 random primers tested, amplicon profiles of 15 were reproducible. A total of 149 amplicon levels, with an average of 9.9 bands per primer, were available for analysis, of which 148 were polymorphic (99.3%). It was possible to discriminate all the isolates with any of the 15 primers employed. UPGMA clustering of data indicated that the isolates shared varied levels of genetic similarity within a range of 0.14 to 0.72 similarity coefficient index and it was suggestive that grouping of isolates was not related to sampling location in anyway. A high level of genetic heterogeneity of 0.28 was recorded among the isolates.
Daspute, Abhijit,Fakrudin, B. The Korean Society of Plant Pathology 2015 Plant Pathology Journal Vol.31 No.1
Pigeonpea Sterility Mosaic Disease (PSMD) is an important foliar disease caused by Pigeonpea sterility mosaic virus (PPSMV) which is transmitted by eriophyid mites (Aceria cajani Channabasavanna). In present study, a F2 mapping population comprising 325 individuals was developed by crossing PSMD susceptible genotype (Gullyal white) and PSMD resistant genotype (BSMR 736). We identified a set of 32 out of 300 short decamer random DNA markers that showed polymorphism between Gullyal white and BSMR 736 parents. Among them, eleven DNA markers showed polymorphism including coupling and repulsion phase type of polymorphism across the parents. Bulked Segregant Analysis (BSA), revealed that the DNA marker, IABTPPN7, produced a single coupling phase marker (IABTPPN $7_{414}$) and a repulsion phase marker (IABTPPN $7_{983}$) co-segregating with PSMD reaction. Screening of 325 F2 population using IABTPPN7 revealed that the repulsion phase marker, IABTPPN $7_{983}$, was co-segregating with the PSMD responsive SV1 at a distance of 23.9 cM for Bidar PPSMV isolate. On the other hand, the coupling phase marker IABTPPN $7_{414}$ did not show any linkage with PSMD resistance. Additionally, single marker analysis both IABTPPN $7_{983}$ (P<0.0001) and IABTPPN $7_{414}$ (P<0.0001) recorded a significant association with the PSMD resistance and explained a phenotypic variance of 31 and 36% respectively in $F_2$ population. The repulsion phase marker, IABTPPN7983, could be of use in Marker-Assisted Selection (MAS) in the PPSMV resistance breeding programmes of pigeonpea.
Inheritance of Pigeonpea Sterility Mosaic Disease Resistance in Pigeonpea
Daspute, Abhijit,Fakrudin, B.,Bhairappanavar, Shivarudrappa B.,Kavil, S.P.,Narayana, Y.D.,Muniswamy, Muniswamy,Kaumar, Anil,Krishnaraj, P.U.,Yerimani, Abid,Khadi, B.M. The Korean Society of Plant Pathology 2014 Plant Pathology Journal Vol.30 No.2
A comprehensive study was conducted using PPSMV resistant (BSMR 736) and susceptible (ICP 8863) genotypes to develop a segregating population and understand the inheritance of PPSMV resistance. The observed segregation was comparable to 13 (susceptible): 3 (resistant). Hence, the inheritance was controlled by two genes, SV1 and SV2, with inhibitory gene interaction.
Suvarna Patil,Fakrudin Bashasab,Vijaykumar,Basavanagoud,Mahaling S Kuruvinashetti,Basavaraj V Patil 한국응용곤충학회 2006 Journal of Asia-Pacific Entomology Vol.9 No.3
The genetic relatedness among Helicoverpa armigera (Hübner) occurring on different host plants prevailing in South India was studied using PCR- RAPD. Genomic DNA was isolated individually from five larvae collected from each of 10 different host plants (except in okra). PCR-RAPD analysis was carried out using a set of 20 random primers which had produced repeatable banding patterns from a original set of 60 primers. A set of 155 amplicon levels were available for analysis, of which 154 were polymorphic. An average of 7.75 bands per primer was recorded. Similarity coefficients based on the frequency of band sharing among host strains varied from 0.25 in cotton and sunflower to 0.72 in groundnut. Clustering analysis on the basis of the PCR-RAPD-generating band sharing indicated that most of the individuals occurring on niger, safflower, green gram, abutilon and lagasca clustered together, indicating greater genetic similarity among themselves, than those occurring on other crops. Furthermore, the pattern of genetic variation in the individuals collected from niger, safflower, green gram, groundnut, abutilon and lagasca was seem to be largely host-dependent.
Abhijit Daspute,B. Fakrudin 한국식물병리학회 2015 Plant Pathology Journal Vol.31 No.1
Pigeonpea Sterility Mosaic Disease (PSMD) is an importantfoliar disease caused by Pigeonpea sterilitymosaic virus (PPSMV) which is transmitted by eriophyidmites (Aceria cajani Channabasavanna). Inpresent study, a F2 mapping population comprising325 individuals was developed by crossing PSMD susceptiblegenotype (Gullyal white) and PSMD resistantgenotype (BSMR 736). We identified a set of 32 out of300 short decamer random DNA markers that showedpolymorphism between Gullyal white and BSMR 736parents. Among them, eleven DNA markers showedpolymorphism including coupling and repulsion phasetype of polymorphism across the parents. BulkedSegregant Analysis (BSA), revealed that the DNAmarker, IABTPPN7, produced a single coupling phasemarker (IABTPPN7414) and a repulsion phase marker(IABTPPN7983) co-segregating with PSMD reaction. Screening of 325 F2 population using IABTPPN7 revealedthat the repulsion phase marker, IABTPPN7983,was co-segregating with the PSMD responsive SV1 ata distance of 23.9 cM for Bidar PPSMV isolate. On theother hand, the coupling phase marker IABTPPN7414did not show any linkage with PSMD resistance. Additionally,single marker analysis both IABTPPN7983(P<0.0001) and IABTPPN 7414 (P<0.0001) recorded asignificant association with the PSMD resistance andexplained a phenotypic variance of 31 and 36% respectivelyin F2 population. The repulsion phase marker,IABTPPN7983, could be of use in Marker-AssistedSelection (MAS) in the PPSMV resistance breedingprogrammes of pigeonpea.
Inheritance of Pigeonpea Sterility Mosaic Disease Resistance in Pigeonpea
Abhijit Daspute,B. Fakrudin,Shivarudrappa. B. Bhairappanavar,S. P. Kavil,Y. D. Narayana,Abid Yerimani,B. M. Khadi,P. U. Krishnaraj,Muniswamy,Anil Kaumar 한국식물병리학회 2014 Plant Pathology Journal Vol.30 No.2
A comprehensive study was conducted using PPSMV resistant (BSMR 736) and susceptible (ICP 8863) genotypes to develop a segregating population and understand the inheritance of PPSMV resistance. The observed segregation was comparable to 13 (susceptible): 3 (resistant). Hence, the inheritance was controlled by two genes, SV1 and SV2, with inhibitory gene interaction.
Patil Suvarna,Bashasab Fakrudin,Vijaykumar Vijaykumar,Basavanagoud Basavanagoud,Kuruvinashetti Mahaling S,Patil Basavaraj V Korean Society of Applied Entomology 2006 Journal of Asia-Pacific Entomology Vol.9 No.3
The genetic relatedness among Helicoverpa armigera ($H\"{u}bner$) occurring on different host plants prevailing in South India was studied using PCR-RAPD. Genomic DNA was isolated individually from five larvae collected from each of 10 different host plants (except in okra). PCR-RAPD analysis was carried out using a set of 20 random primers which had produced repeatable banding patterns from a original set of 60 primers. A set of 155 amplicon levels were available for analysis, of which 154 were polymorphic. An average of 7.75 bands per primer was recorded. Similarity coefficients based on the frequency of band sharing among host strains varied from 0.25 in cotton and sunflower to 0.72 in groundnut. Clustering analysis on the basis of the PCR-RAPD-generating band sharing indicated that most of the individuals occurring on niger, safflower, green gram, abutilon and lagasca clustered together, indicating greater genetic similarity among themselves, than those occurring on other crops. Furthermore, the pattern of genetic variation in the individuals collected from niger, safflower, green gram, groundnut, abutilon and lagasca was seem to be largely host-dependent.