Components of resistance to Mycosphaerella graminicola and Phaeosphaeria nodorum in spring wheats

Euphytica ◽  
1996 ◽  
Vol 89 (3) ◽  
pp. 377-385
Author(s):  
R. Loughman ◽  
R. E. Wilson ◽  
G. J. Thomas
Keyword(s):  
Mycosphaerella Graminicola ◽  
Components Of Resistance ◽  
Phaeosphaeria Nodorum

scholarly journals Health of leaves and ears of spring wheat (Triticum aestivum L.) cultivated after different forecrops

2013 ◽  
Vol 57 (1-2) ◽  
pp. 119-129
Author(s):  
Barbara Majchrzak ◽  
Tomasz P. Kurowski ◽  
Adam Okorski
Keyword(s):  
Spring Wheat ◽  
Triticum Aestivum L ◽  
Mycosphaerella Graminicola ◽  
Camelina Sativa ◽  
Brown Rust ◽  
Leaf Blotch ◽  
Ear Blight ◽  
Phaeosphaeria Nodorum ◽  
False Flax ◽  
Glume Blotch

The research was conduced in the years 2000-2002. The aim of the research was to determinate the health of leaves and ears of spring wheat cultivated after spring cruciferae plants such as: spring oilseed rape (<i>Brassica napus</i> ssp. <i>oleiferus</i> Metz.), chiiiese mustard (<i>Brassica juncea</i> L.), white mustard (<i>Sinapis alba</i> L.), ole iferous radish (<i>Raphanus sativus</i> var. <i>oleiferus</i> L.), false flax (<i>Camelina sativa</i> L.), crambe (<i>Crambe abbysinica</i> Hoechst.), as well as after oat (<i>Avena sativa</i> L.) as con trol. Spring wheat cv. Torka was sown after: pIoughed stubble cultivated on this field, ploughed stubble and straw, ploughed stubble with straw and 30 kg nitrogen per hectare. During all the years of studies on leaves and ears of spring wheat septo ria of leaf blotch and glume blotch (<i>Mycosphaerella graminicola, Phaeosphaeria nodorum</i>) were found. Brown rust (<i>Puccinia recondita</i> f. sp. <i>tritici</i>) was seen on leaves of wheat only during years 2001-2002. Besides on ears fusarium ear blight (Fusarimn sp.) was present in 2002 and sooty mould (<i>Cladosporium sp., Alternaria</i> sp.) in 2001. According to health of overground parts of plants the good forecrops to spring wheat were oat, chinese mustard, oleiferous radish. The biggest impact on presence of diseases of leaves and ears had the weather during years of studies. The use of after harvest rests didn't have significant influence on health of leaves and ears of spring wheat.

scholarly journals Long-term relationships between environment and abundance in wheat of Phaeosphaeria nodorum and Mycosphaerella graminicola

2007 ◽  
Vol 0 (0) ◽  
pp. 071018051611004-??? ◽  
Author(s):  
M. W. Shaw ◽  
S. J. Bearchell ◽  
B. D. L. Fitt ◽  
B. A. Fraaije
Keyword(s):  
Mycosphaerella Graminicola ◽  
Phaeosphaeria Nodorum

СТРУКТУРА И АРЕАЛЫ ПОПУЛЯЦИЙ ФИТОПАТОГЕННЫХ ГРИБОВ

2016 ◽  
Vol 8 (2) ◽  
pp. 216
Author(s):  
М.М. Левитин ◽  
Н.В. Мироненко
Keyword(s):  
Fusarium Oxysporum ◽  
Puccinia Triticina ◽  
Mycosphaerella Graminicola ◽  
Cochliobolus Sativus ◽  
Pyrenophora Teres ◽  
Phaeosphaeria Nodorum

Установление структуры и ареалов популяций фитопатогенных грибов имеет не только научную значимость, но и важное практическое значение для селекции и распределения в агроценозах болезнеустойчивых сортов, повышения эффективности защитных мероприятий, улучшения экологической обстановки на посевах сельскохозяйственных культур. В последнее десятилетие разработан ряд новых подходов в методах анализа популяций. В частности, разработаны новые типы молекулярных маркеров, техника скоростного секвенирования, внедрены новые аналитические программы. Это позволило уточнить структуру и степень локализации ряда популяций фитопатогенных грибов. Некоторые виды фитопатогенных грибов имеют широкий ареал распределения. К ним относятся многие виды ржавчинных грибов, как, например, Puccinia triticina, P. graminis, P. striiformis и некоторые виды гемибиотрофных грибов – Cochliobolus sativus, Mycosphaerella graminicola и Phaeosphaeria nodorum. В частности, показано, что на территории России существуют по меньшей мере 3 популяции P. triticina, различающиеся по вирулентности. Известны виды с узкой локализацией, например, Pyrenophora teres и Fusarium oxysporum. Узколокальное распределение популяций возбудителей болезней требует иного подхода в использовании генов устойчивости, чем для популяций, имеющих широкий ареал.

Identity and conservation of mating type genes in geographically diverse isolates of Phaeosphaeria nodorum

2003 ◽  
Vol 40 (1) ◽  
pp. 25-37 ◽  
Author(s):  
R.S Bennett ◽  
S.-H Yun ◽  
T.Y Lee ◽  
B.G Turgeon ◽  
E Arseniuk ◽  
...  
Keyword(s):  
Mating Type ◽  
Phaeosphaeria Nodorum ◽  
Mating Type Genes

The behavioural responses of three different strains of Musca domestica (Diptera: Muscidae) to Alfacron bait in the laboratory

1992 ◽  
Vol 82 (4) ◽  
pp. 471-478 ◽  
Author(s):  
Z.A. Freeman ◽  
D.B Pinniger
Keyword(s):  
Musca Domestica ◽  
Resistant Strain ◽  
Behavioural Responses ◽  
Components Of Resistance ◽  
Minute Period ◽  
Proboscis Extension ◽  
Number Of Visits ◽  
Time Spent Feeding ◽  
Different Strains ◽  
Cage Test

AbstractA study was carried out to investigate the behavioural components of resistance in the Standlake strain of Musca domestica Linnaeus. The flies were collected from a poultry unit where azamethiphos spray-on-bait (Alfacron), had been regularly used to control the fly population. A no-choice laboratory cage test was used to observe the responses of the Standlake resistant strain to baits and compare it with two other strains namely, Sparsholt resistant and Cooper susceptible. The baits used were, Alfacron, sugar and analytical grade azamethiphos, sugar alone, and a blank target as control. Only female flies were used, each strain was exposed separately to each bait over a 50 minute period and the responses were recorded with a datalogger. The responses (per fly) recorded during each test period were: the number of visits to a bait; the time spent on a bait; the number of feeds and time spent feeding on the bait defined as the number of proboscis contacts and the length of time of proboscis contact with the bait. Knockdown of flies was recorded at the end of each test. All strains showed differences in their responses to baits. The Standlake strain showed the greatest difference to responses to Alfacron, with inhibition of proboscis extension when flies landed on the bait and a lower proboscis contact when extended, resulting in fewer flies being knocked down by Alfacron than by the sugar and azamethiphos bait. This suggested that inhibition of feeding on the Alfacron bait by the Standlake strain was caused by formulation components or contaminants and not the active insecticide ingredient, azamethiphos.

Microsatellite markers provide evidence for sexual reproduction of Mycosphaerella graminicola in Saskatchewan

Genome ◽  
2004 ◽  
Vol 47 (5) ◽  
pp. 789-794 ◽  
Author(s):  
M Razavi ◽  
G R Hughes
Keyword(s):  
Genetic Diversity ◽  
Genetic Variability ◽  
Sexual Reproduction ◽  
Primary Source ◽  
Mycosphaerella Graminicola ◽  
Septoria Tritici Blotch ◽  
Septoria Tritici ◽  
Allelic Series ◽  
Evolutionary Potential ◽  
Wheat Field

This study examined the genetic structure of a Saskatchewan population of Mycosphaerella graminicola, cause of the foliar disease Septoria tritici blotch of wheat. Such knowledge is valuable for understanding the evolutionary potential of this pathogen and for developing control strategies based on host resistance. Nine pairs of single-locus microsatellite primers were used to analyze the genomic DNA of 90 isolates of M. graminicola that were collected using a hierarchical sampling procedure from different locations, leaves, and lesions within a wheat field near Saskatoon. Allelic series at eight different loci were detected. The number of alleles per locus ranged from one to five with an average of three alleles per locus. Genetic diversity values ranged from 0.04 to 0.67. Partitioning the total genetic variability into within- and among-location components revealed that 88% of the genetic variability occurred within locations, i.e., within areas of 1 m2, but relatively little variability occurred among locations. Low variability among locations and a high degree of variability within locations would result if the primary source of inoculum was airborne ascospores, which would be dispersed uniformly within the field. This finding was confirmed by gametic disequilibrium analysis and suggests that the sexual reproduction of M. graminicola occurs in Saskatchewan.Key words: Mycosphaerella graminicola, SSR markers, sexual reproduction, genetic diversity.

Notes: Isolation of the New (- )-(3 R,4S)-4-Hydroxymellein from the Fungus Septoria nodorum Berk

1992 ◽  
Vol 47 (9-10) ◽  
pp. 779-781 ◽  
Author(s):  
Michel Devys ◽  
Michel Barbier ◽  
Jean-Frangois Bousquet ◽  
Albert Kollmann
Keyword(s):  
Septoria Nodorum ◽  
Phaeosphaeria Nodorum

The new (-)-(3 R,4 S)-4-hydroxymellein (6) is isolated from the fungus Septoria (Phaeosphaeria) nodorum Berk, together with the previously reported isomer 5. The results so far obtained in this series of metabolites are discussed in relationship with biosynthetic considerations.

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