Genomic and Geographic Origins of Timothy (Phleum sp.) Based on ITS and Chloroplast Sequences

2009 ◽  
pp. 71-82 ◽  
Author(s):  
Alan V. Stewart ◽  
Andrzej Joachimiak ◽  
Nick Ellison
Keyword(s):  
Geographic Origins

Edaphic and Geographic Origins of Varietal Differentiation InEriogonum calcareum

Madroño ◽  
2017 ◽  
Vol 64 (1) ◽  
pp. 22-31
Author(s):  
Brittni J. Brown ◽  
Donald H. Mansfield
Keyword(s):  
Geographic Origins ◽  
Varietal Differentiation

Genetic Diversity of Gibberella Fujikuroi Isolates from Different Geographic Origins

1997 ◽  
Vol 25 (3) ◽  
pp. 557-560 ◽  
Author(s):  
Ulrike F. Schlacht ◽  
Evelyn M. Möller ◽  
Hartwig G. Geiger
Keyword(s):  
Genetic Diversity ◽  
Gibberella Fujikuroi ◽  
Geographic Origins

scholarly journals Morphological and Pathogenic Variability amongMacrophomina phaseolinaIsolates Associated with Mungbean (Vigna radiataL.) Wilczek from Pakistan

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Umer Iqbal ◽  
Tariq Mukhtar
Keyword(s):  
Macrophomina Phaseolina ◽  
Morphological Characters ◽  
Geographic Origins ◽  
Low Weight ◽  
Breeding Programmes ◽  
Diverse Origin ◽  
Pathogenic Variability ◽  
Slow Growing ◽  
Highly Virulent ◽  
Medium Weight

Macrophomina phaseolinais a serious pathogen of many crops. In the present studies, 65 isolates ofMacrophomina phaseolinafrom different agroecological regions of Punjab and Khyber Pakhtunkhwa provinces of Pakistan were analyzed for morphological and pathogenic variability. Regardless of their geographic origins, significant differences were detected among 65 isolates in their radial growth, sclerotial size, and weight as well as in pathogenicity. Sixteen isolates were rated as fast growing, 11 as slow growing, and the rest of the isolates as medium growing. Nine isolates were classified as large sized, 26 as small sized, and the remaining 30 isolates as medium sized. Thirty five isolates were ranked as heavy weight, 12 as low weight, and the rest of isolates were grouped as medium weight. Ten fungal isolates appeared to be least virulent, whereas eight isolates of diverse origin proved to be highly virulent against mungbean cultivars. The remaining isolates were regarded as moderately virulent. No relationship was found among the morphological characters and pathogenicity of the isolates. These morphological and pathogenic variations in various isolates ofM. phaseolinamay be considered important in disease management systems and will be useful in breeding programmes of mungbean cultivars resistant to charcoal rot.

Acclimation to changing light conditions of long-term shade-grown beech (Fagus sylvatica L.) seedlings of different geographic origins

Trees ◽  
1998 ◽  
Vol 12 (6) ◽  
pp. 326-333 ◽  
Author(s):  
R. Tognetti ◽  
Gianfranco Minotta ◽  
Simone Pinzauti ◽  
Marco Michelozzi ◽  
Marco Borghetti
Keyword(s):  
Fagus Sylvatica ◽  
Light Conditions ◽  
Geographic Origins ◽  
Fagus Sylvatica L ◽  
Changing Light

scholarly journals Evaluation of Virulence to Adlays of Korean Isolates of Bipolaris coicis Using a Disease Rating Scale

Plant Disease ◽  
2003 ◽  
Vol 87 (6) ◽  
pp. 726-731 ◽  
Author(s):  
Seog Won Chang ◽  
Byung Kook Hwang
Keyword(s):  
Analysis Of Variance ◽  
Environmental Conditions ◽  
Rating Scale ◽  
Leaf Blight ◽  
Reliable Criterion ◽  
Qualitative And Quantitative ◽  
Virulent Isolate ◽  
Geographic Origins ◽  
Disease Rating

The virulence of 33 isolates of Bipolaris coicis from diverse geographic origins in Korea was evaluated on six adlay cultivars or lines under controlled environmental conditions. To evaluate infection levels of B. coicis isolates in adlay plants, a 10-class disease rating scale was developed based on the qualitative and quantitative differences of lesions on adlay leaves infected. There were significant differences in virulence among isolates of B. coicis, although the differences were quantitative rather than qualitative. Significant differences also were observed among cultivar-isolate interactions in the analysis of variance. All isolates of B. coicis, except KG-9515, were pathogenic on adlay plants. BC-20136, the most virulent isolate, was capable of causing highly susceptible reactions on the adlay cultivars or lines. Significant differences in levels of resistance were found among six adlay cultivars or lines tested. The disease rating scale may be a reliable criterion to evaluate a large number of adlays for resistance to leaf blight or B. coicis isolates for virulence to adlays.

Genetic diversity of fringed brome (Bromus ciliatus) as determined by amplified fragment length polymorphism

2005 ◽  
Vol 83 (10) ◽  
pp. 1322-1328 ◽  
Author(s):  
Yong-Bi Fu ◽  
Bruce E. Coulman ◽  
Yasas S.N. Ferdinandez ◽  
Jacques Cayouette ◽  
Paul M. Peterson
Keyword(s):  
Genetic Diversity ◽  
Length Polymorphism ◽  
Fragment Length ◽  
Habitat Restoration ◽  
Fragment Length Polymorphism ◽  
Natural Populations ◽  
Germplasm Conservation ◽  
Amplified Fragment Length Polymorphism ◽  
Large Area ◽  
Geographic Origins

Fringed brome ( Bromus ciliatus L.) is found in native stands throughout a large area of North America. Little is known about the genetic diversity of this species. The amplified fragment length polymorphism (AFLP) technique was applied to assess the genetic diversity of 16 fringed brome populations sampled in Canada from the provinces of Alberta, British Columbia, Quebec, and Saskatchewan. Four AFLP primer pairs were employed to screen 82 samples with four to six samples per population and 83 polymorphic AFLP bands scored for each sample. The frequencies of the scored bands in all assayed samples ranged from 0.01 to 0.99 and averaged 0.53. Analysis of molecular variance revealed that 52.6% of the total AFLP variation resided among the 16 populations and 20.6% among the four provinces. The five Quebec populations appeared to be genetically the most diverse and distinct. The AFLP variability observed was significantly associated with the geographic origins of the fringed brome populations. These findings are useful for sampling fringed brome germplasm from natural populations for germplasm conservation and should facilitate the development of genetically diverse regional cultivars for habitat restoration and revegetation.

scholarly journals The molecular diversity of different isolates of Beauveria bassiana (Bals.) Vuill. as assessed using intermicrosatellites (ISSRs)

2007 ◽  
Vol 12 (2) ◽  
Author(s):  
M. Estrada ◽  
Manuel Camacho ◽  
César Benito
Keyword(s):  
Beauveria Bassiana ◽  
The Other ◽  
Caribbean Region ◽  
Pcr Markers ◽  
Issr Primer ◽  
Geographic Origins ◽  
The Caribbean ◽  
Beauveria Bassiana Isolates ◽  
High Level ◽  
Issr Pcr

AbstractInter-microsatellite PCR (ISSR-PCR) markers were used to identify and to examine the genetic diversity of eleven Beauveria bassiana isolates with different geographic origins. The variability and the phylogenetic relationships between the eleven strains were analyzed using 172 ISSR-PCR markers. A high level of polymorphism (near 80%) was found using these molecular markers. Seven different isolates showed exclusive bands, and ISSR primer 873 was able to distinguish between all the strains. The dendrogram obtained with these markers is robust and in agreement with the geographical origins of the strains. All the isolates from the Caribbean region were grouped together in a cluster, while the other isolates grouped in the other cluster. The similarity exhibited between the two clusters was less than 50%. This value of homology shows the high genetic variability detected between the isolates from the Caribbean region and the other isolates. ISSR-PCR markers provide a quick, reliable and highly informative system for DNA fingerprinting, and allowed the identification of the different B. bassiana isolates studied.

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