Genotypic–phenotypic diversity and distinctiveness among Magnaporthe grisea isolates from rice and weed Echinochloa colonum

2021 ◽  
Author(s):  
Soma Samanta ◽  
Shubhransu Nayak ◽  
Urmila Dhua ◽  
Arup Kumar Mukherjee
Keyword(s):  
Magnaporthe Grisea ◽  
Phenotypic Diversity

scholarly journals Estimation of phenotypic diversity in field populations of Magnaporthe grisea from two upland rice cultivars

2007 ◽  
Vol 32 (1) ◽  
pp. 5-12 ◽  
Author(s):  
Gisele B. Silva ◽  
Laércio Zambolim ◽  
Anne S. Prabhu ◽  
Leila G. Araújo ◽  
Francisco J.P. Zimmermann
Keyword(s):  
Standard Deviation ◽  
Magnaporthe Grisea ◽  
Upland Rice ◽  
Phenotypic Diversity ◽  
Diversity Index ◽  
Rice Cultivars ◽  
Simpson Index ◽  
Reaction Type ◽  
Growing Seasons ◽  
Differential Cultivars

The phenotypic diversity of Magnaporthe grisea was evaluated based on leaf samples with blast lesions collected from eight commercial fields of the upland rice cultivars 'BRS Primavera' and 'BRS Bonança', during the growing seasons of 2001/2002 and 2002/2003, in Goias State. The number of M. grisea isolates from each field utilized for virulence testing varied from 28 to 47. Three different indices were used based on reaction type in the eight standard international differentials and eight Brazilian differentials. The M. grisea subpopulations of ´Primavera' and 'Bonança', as measured by Simpson, Shannon and Gleason indices, showed similar phenotypic diversities. The Simpson index was more sensitive relation than those of Shannon and Gleason for pathotype number and standard deviation utilizing Brazilian differentials. However, the Gleason index was sensitive to standard deviation for international differentials. The sample size did not significantly influence the diversity index. The two sets of differential cultivars used in this study distinguished phenotypic diversity in different ways in all of the eight subpopulations analyzed. The phenotypic diversity determined based on eight differential Brazilian cultivars was lower in commercial rice fields of 'Primavera' than in the fields of 'Bonança,' independent of the diversity index utilized, year and location. Considering the Brazilian differentials, the four subpopulations of 'BRS Primavera' did not show evenness in distribution and only one pathotype dominated in the populations. The even distribution of pathotype was observed in three subpopulations of 'BRS Bonança'. The pathotype diversity of M. grisea was determined with more precision using Brazilian differentials and Simpson index.

Phenotypic diversity ofCoreopsis leavenworthiiTorr. & Gray (Asteraceae)

2007 ◽  
Vol 8 (1) ◽  
pp. 45-57
Author(s):  
David M Czarnecki ◽  
Jeffrey G Norcini ◽  
Zhanao Deng
Keyword(s):  
Phenotypic Diversity

Phenotypic diversity of sugarcane variety germplasm

2010 ◽  
Vol 18 (1) ◽  
pp. 37 ◽  
Author(s):  
Liu Xinlong ◽  
Cai Qing ◽  
Wu Caiwen ◽  
Ma Li ◽  
Ying Xiongmei ◽  
...  
Keyword(s):  
Phenotypic Diversity ◽  
Sugarcane Variety

Study on phenotypic diversity of Miscanthus floridulus

2014 ◽  
Vol 39 (2) ◽  
pp. 150-154 ◽  
Author(s):  
Liang XIAO ◽  
Jian-xiong JIANG ◽  
Zi-li YI ◽  
Xin AI ◽  
Nian-dan DENG ◽  
...  
Keyword(s):  
Phenotypic Diversity
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