On Selection of Resistant Potato Cultivars to Common Scab(S. scabies)

It were adduced the results of investigation of cultivar variability of potato clones obtained with biotechnological methods. The lines of virus-free regenerants are significantly different from each other within the bounds of cultivar pattern, especially on the sign of their productivity. There are epigenetic differences and they are saved in tuber generations. Variability of callusing-derivation clonals has genetic character. It is underlined the necessity of effective selection of best-characteristic lines for the potato seed initial material.

Download Full-text

APPLICATION OF STATISTICAL TOOLS FOR ESTIMATION OF CLONAL LINES AT IMPROVEMENT OF VIRUS-FREE POTATO VARIATES

Agriciltural microbiology ◽

10.35868/1997-3004.15.125-139 ◽

2012 ◽

Vol 15 ◽

pp. 125-139

Author(s):

I.V. Demchuk

Keyword(s):

Statistical Estimation ◽

Potato Cultivars ◽

Initial Material ◽

Statistical Tools ◽

Potato Varieties ◽

Clonal Lines ◽

The Given ◽

Productive Virus ◽

Selection Of

Productivity of use of technique for statistical estimation of virusfree clonal lines at improvement of potato varieties was overviewed. It was shown, that application of the given technique can considerably improve the quality of initial material at sanitation of potato cultivars by biotechnological methods at the expense of selection of highly productive virus-free lines without deviations from the initial phenotype.

Download Full-text

Investigation of Streptomyces scabies Causing Potato Scab by Various Detection Techniques, Its Pathogenicity and Determination of Host-Disease Resistance in Potato Germplasm

Pathogens ◽

10.3390/pathogens9090760 ◽

2020 ◽

Vol 9 (9) ◽

pp. 760

Author(s):

Sohaib Ismail ◽

Bo Jiang ◽

Zohreh Nasimi ◽

M. Inam-ul-Haq ◽

Naoki Yamamoto ◽

...

Keyword(s):

Genetic Diversity ◽

Common Scab ◽

Streptomyces Scabies ◽

Potato Cultivars ◽

Potato Tubers ◽

Streptomyces Species ◽

Detection Techniques ◽

Streptomyces Spp ◽

Geographical Regions

Streptomyces scabies is a Gram-positive bacterial pathogen that causes common scab disease to several crops, particularly in the potato. It is a soil borne pathogen, a very devastating scab pathogen and difficult to manage in the field. Streptomyces has several species that cause common scab such as S. scabiei, S. acidiscabies, S. europaeiscabiei, S. luridiscabiei, S. niveiscabiei, S. puniciscabiei, S. reticuliscabiei, S. stelliscabiei, S. turgidiscabies, S. ipomoeae. Common scab disease harmfully affects potato economic and market value due to the presence of black spots on the tuber. Owing to its genetic diversity and pathogenicity, the determination of pathogen presence in potato fields is still challenging. In this study, S. scabies genetic diversity was measured by surveying five potato-growing areas of Pakistan during the growing season 2019. A total of 50 Streptomyces isolates, including S. scabies, S. acidiscabies, S. griseoflavus were isolated and identified based on morphologic, biochemical and molecular analysis. Virulent confirmation assays confirmed ten virulent strains of Streptomyces spp. On the potato cultivars Cardinal and Santee. Among the Streptomyces species, S. scabies showed the highest scab index, followed by S. acidiscabies and S. griseoflavus by exhibiting the scab-like lesions on potato tubers. Ten potato cultivars were screened against these virulent isolates of Streptomyces. The Faisalabad white variety showed the highest scab index followed By Cardinal, Tourag, Kuroda, Santee, Lady Rosetta, Asterix, Diamant, Faisalabad red and Sadaf. Moreover, genetic diversity and pathogenicity of Streptomyces spp. on potato tubers were also likely diverse in different geographical regions and also potato cultivars. This study represents a contribution to understanding the local interaction between potatoes and Streptomyces spp. in Pakistan. It will aid in supporting a solution for the management of this pathogen around the world.

Download Full-text