Morphological, pathological and genetic variations among isolates of Cochliobolus sativus from Nepal

Mahto, B. N.; Gurung, Suraj; Nepal, Achala; Adhikari, Tika B.

doi:10.1007/s10658-011-9914-z

Cited by 12 publications

(8 citation statements)

References 42 publications

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“…It also seems that separating pathogenic characters help in finding a correlation between isolate variability and agroclimatic origin. Different studies to characterize B. sorokiniana isolates from distinct agroclimatic areas showed that significant differences exist in host response ( Mahto et al, 2012 ) and genetic composition. Although the isolates from five different groups were distinct in their virulence, positive relationship was found between these traits and the agroclimaic origin of the isolates.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Pathogenic Variability Based on Leaf Blotch Disease Development Components of Bipolaris sorokiniana in Triticum aestivum and Agroclimatic Origin

et al. 2018

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Section: Discussionmentioning

confidence: 99%

Evaluation of Pathogenic Variability Based on Leaf Blotch Disease Development Components of Bipolaris sorokiniana in Triticum aestivum and Agroclimatic Origin

et al. 2018

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“…P526P‐09‐02536) to NDSU, Fargo, ND. Inoculum preparation and inoculation procedures were the same as described previously (Mahto et al, 2010, 2011). Briefly, a mycelium plug was placed on V8 potato dextrose agar consisting of 150 mL of V8 juice (Campbell Soup Company), 10 g of potato dextrose (Becton, Dickinson and Company), 10 g of Difco agar, 3 g of calcium carbonate, and 850 mL of sterile distilled water in 10‐cm petri dishes.…”

Section: Methodsmentioning

confidence: 99%

Association Mapping of Quantitative Trait Loci in Spring Wheat Landraces Conferring Resistance to Bacterial Leaf Streak and Spot Blotch

et al. 2012

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Bacterial leaf streak (BLS), caused by Xanthomonas translucens pv. undulosa (Smith et al.) Bragard et al., and spot blotch (SB), caused by Cochliobolus sativus (S. Ito & Kurib.) Drechs. ex Dastur, are two emerging diseases of wheat (Triticum aestivum L.). To achieve sustainable disease management strategies and reduce yield losses, identifying new genes that confer quantitative resistance would benefi t resistance breeding efforts. The main objective of this study was to use association mapping (AM) with 832 polymorphic Diversity Arrays Technology (DArT) markers to identify genomic regions associated with resistance to BLS and SB in 566 spring wheat landraces. From data analysis of this diverse panel of wheat accessions, we discovered fi ve novel genomic regions signifi cantly associated with resistance to BLS on chromosomes 1A, 4A, 4B, 6B, and 7D. Similarly, four genomic regions were found to be associated with resistance to SB on chromosomes 1A, 3B, 7B, and 7D. A high degree of linkage disequilibrium (LD) decayed over short genetic distance in the set of wheat accessions studied, and some of these genomic regions appear to be involved in multiple disease resistance (MDR). These results suggest that the AM approach provides a platform for discovery of resistance conditioned by multiple genes with quantitative effects, which could be validated and deployed in wheat breeding programs.

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“…Difference in virulence property as observed in this study has also been reported in other Phytophthora spp. [22,23] and in other plant pathogens [24,25]. No correlation could be elucidated from the phenotypic or genotypic characteristics and geographical origin of the isolates.…”

Section: Discussionmentioning

confidence: 99%

Genetic and Phenotypic characterization of Phytophthora colocasiae in Taro Growing Areas of India

Nath¹,

Basheer²,

Jeeva³

et al. 2016

J Plant Pathol Microbiol

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Phenotypic and molecular methods were used for characterizing 40 Phytophthora colocasiae isolates obtained from Andhra Pradesh, Assam, Kerala, and Odisha regions of India over a period of five years. Phenotypic parameters such as virulence, colony morphology and mating type varied among isolates collected from different regions over the years. No correlation was observed between phenotypic parameters of the isolates and their geographical origins. Considerable inter and intra specific variation were detected by random amplified microsatellites (RAMS) analysis with 100% polymorphism among the isolates. Dendrogram constructed based on RAMS data using the unweighted pair group method with arithmetic mean (UPGMA) grouped the P. colocasiae isolates into two major clusters. No relationship was obtained between RAMS groups of the isolates and phenotypic characters/geographical origin. Population genetic analysis showed that P. colocasiae isolates were highly diverse among different regions. Analysis of molecular variance (AMOVA) showed that most of the genetic variability in P. colocasiae was confined to within a population (93.21%). These results indicate that P. colocasiae populations in India are highly diverse and care should be taken in developing disease management programmes or in breeding resistant cultivars.

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Morphological, pathological and genetic variations among isolates of Cochliobolus sativus from Nepal

Cited by 12 publications

References 42 publications

Evaluation of Pathogenic Variability Based on Leaf Blotch Disease Development Components of Bipolaris sorokiniana in Triticum aestivum and Agroclimatic Origin

Evaluation of Pathogenic Variability Based on Leaf Blotch Disease Development Components of Bipolaris sorokiniana in Triticum aestivum and Agroclimatic Origin

Association Mapping of Quantitative Trait Loci in Spring Wheat Landraces Conferring Resistance to Bacterial Leaf Streak and Spot Blotch

Genetic and Phenotypic characterization of Phytophthora colocasiae in Taro Growing Areas of India

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