eprintid: 10561
rev_number: 11
eprint_status: archive
userid: 1305
dir: disk0/00/01/05/61
datestamp: 2018-04-13 04:45:54
lastmod: 2018-04-13 04:45:54
status_changed: 2018-04-13 04:45:54
type: article
metadata_visibility: show
creators_name: Babu, T K
creators_name: Sharma, R
creators_name: Thakur, R P
creators_name: Upadhyaya, H D
creators_name: Reddy, P N
creators_name: Girish, A G
icrisatcreators_name: Babu, T K
icrisatcreators_name: Sharma, R
icrisatcreators_name: Thakur, R P
icrisatcreators_name: Upadhyaya, H D
icrisatcreators_name: Girish, A G
affiliation: Acharya N. G. Ranga Agricultural University (ANGRAU), Rajendranagar (Hyderabad)
affiliation: ICRISAT (Patancheru)
affiliation: Department of Agronomy, Kansas State University (Manhattan)
affiliation: The UWA Institute of Agriculture, The University of Western Australia (Crawley)
affiliation: ANGRAU (Telangana)
country: India
country: USA
country: Australia
title: Selection of Host Differentials for Elucidating Pathogenic Variation in Magnaporthe grisea Populations Adapted to Finger Millet (Eleusine coracana)
ispublished: pub
subjects: PG2
subjects: S1.5.2
subjects: s35
full_text_status: public
keywords: Finger Millet, Pathogenic Variation, Finger millet blast, Plant breeding, Pathogenic variability, Plant cultivars
note: Blast, caused by Pyricularia grisea (teleomorph: Magnaporthe grisea), is the most devastating disease of finger millet affecting production, utilization, and trade in Africa and Southeast Asia. An attempt was made to select a set of putative host differentials that can be used to determine virulence diversity in finger-millet-infecting populations of M. grisea. Thus, a differential set comprising eight germplasm accessions selected from finger millet core collection (IE 2911, IE 2957, IE 3392, IE 4497, IE 5091, IE 6240, IE 6337, and IE 7079) and a resistant (‘GPU 28’) and a susceptible (‘VR 708’) variety was developed. This differential set was used to study pathogenic variation in 25 isolates of M. grisea collected from Karnataka, Telangana, and Andhra Pradesh states in India. Based on the reaction (virulent = score ≥4 and avirulent = score ≤3 on a 1-to-9 scale) on host differentials, nine pathotypes were identified among 25 M. grisea isolates. Pathotype 9, represented by isolate Pg23 from Vizianagaram, was the most virulent because it could infect all of the host differentials except GPU 28. This study will be helpful in devising strategies for monitoring virulence change in M. grisea populations, and for identification of blast resistance in finger millet for use in disease resistance breeding programs.
abstract: Blast, caused by Pyricularia grisea (teleomorph: Magnaporthe grisea), is the most devastating disease of finger millet affecting production, utilization, and trade in Africa and Southeast Asia. An attempt was made to select a set of putative host differentials that can be used to determine virulence diversity in finger-millet-infecting populations of M. grisea. Thus, a differential set comprising eight germplasm accessions selected from finger millet core collection (IE 2911, IE 2957, IE 3392, IE 4497, IE 5091, IE 6240, IE 6337, and IE 7079) and a resistant (‘GPU 28’) and a susceptible (‘VR 708’) variety was developed. This differential set was used to study pathogenic variation in 25 isolates of M. grisea collected from Karnataka, Telangana, and Andhra Pradesh states in India. Based on the reaction (virulent = score ≥4 and avirulent = score ≤3 on a 1-to-9 scale) on host differentials, nine pathotypes were identified among 25 M. grisea isolates. Pathotype 9, represented by isolate Pg23 from Vizianagaram, was the most virulent because it could infect all of the host differentials except GPU 28. This study will be helpful in devising strategies for monitoring virulence change in M. grisea populations, and for identification of blast resistance in finger millet for use in disease resistance breeding programs.
date: 2015
date_type: published
publication: Plant Disease
volume: 99
number: 12
publisher: American Phytopathological Society (APS)
pagerange: 1784-1789
id_number: 10.1094/PDIS-10-14-1089-RE
refereed: TRUE
issn: 0191-2917
official_url: http://dx.doi.org/10.1094/PDIS-10-14-1089-RE
related_url_url: https://scholar.google.co.in/scholar?hl=en&as_sdt=0%2C5&q=Selection+of+Host+Differentials+for+Elucidating+Pathogenic+Variation+in+Magnaporthe+grisea+Populations+Adapted+to+Finger+Millet+%28Eleusine+coracana%29&btnG=
related_url_type: pub
citation:   Babu, T K and Sharma, R and Thakur, R P and Upadhyaya, H D and Reddy, P N and Girish, A G  (2015) Selection of Host Differentials for Elucidating Pathogenic Variation in Magnaporthe grisea Populations Adapted to Finger Millet (Eleusine coracana).  Plant Disease, 99 (12).  pp. 1784-1789.  ISSN 0191-2917     
document_url: http://oar.icrisat.org/10561/1/Selection%20of%20Host%20Differentials%20for%20Elucidating.pdf