Abstract
A total of 106 maize seed samples were collected from different agro-climatic regions of India. Sixty-two Fusarium isolates were recovered, 90% of which were identified as Fusarium verticillioides based on morphological and molecular characters. Use of the tef-1α gene corrected/refined the morphological species identifications of 11 isolates, and confirmed those of the remaining isolates. Genetic diversity among the Fusarium isolates involved multilocus fingerprinting profiles by Inter Simple Sequence Repeats (ISSR) UPGMA and tef-1α gene phenetic analyses; for which, we observed no significant differences among the isolates based on geographic origin or fumonisin production; most of the subdivision related to species. Genotyping was performed on the F. verticillioides isolates, using 12 primer sets from the fumonisin pathway, to elucidate the molecular basis of fumonisin production or non-production. One fumonisin-negative isolate, UOMMF-16, was unable to amplify nine of the 12 fumonisin cluster genes tested. We also used the CD-ELISA method to confirm fumonisin production for our 62 Fusarium isolates. Only 15 isolates were found to be fumonisin-negative. Interestingly, genotypic characterization revealed six isolates with various gene deletion patterns that also tested positive for the production of fumonisins via CD-ELISA. Our findings confirm the importance of molecular studies for species delimitation, and for observing genetic and phenotypic diversity, among the Fusaria.
Keywords: Maize, Fusarium, tef-1α gene, Inter simple sequence repeats, Fumonisin gene cluster, CD-ELISA.
Current Genomics
Title:Molecular Diversity of Seed-borne Fusarium Species Associated with Maize in India
Volume: 17 Issue: 2
Author(s): Mohammed Aiyaz, Shetty Thimmappa Divakara, Venkataramana Mudili, Geromy George Moore, Vijai Kumar Gupta, Tapan i Yli-Mattila, Siddaiah Chandra Nayaka and Siddapura Ramachandrappa Niranjana
Affiliation:
Keywords: Maize, Fusarium, tef-1α gene, Inter simple sequence repeats, Fumonisin gene cluster, CD-ELISA.
Abstract: A total of 106 maize seed samples were collected from different agro-climatic regions of India. Sixty-two Fusarium isolates were recovered, 90% of which were identified as Fusarium verticillioides based on morphological and molecular characters. Use of the tef-1α gene corrected/refined the morphological species identifications of 11 isolates, and confirmed those of the remaining isolates. Genetic diversity among the Fusarium isolates involved multilocus fingerprinting profiles by Inter Simple Sequence Repeats (ISSR) UPGMA and tef-1α gene phenetic analyses; for which, we observed no significant differences among the isolates based on geographic origin or fumonisin production; most of the subdivision related to species. Genotyping was performed on the F. verticillioides isolates, using 12 primer sets from the fumonisin pathway, to elucidate the molecular basis of fumonisin production or non-production. One fumonisin-negative isolate, UOMMF-16, was unable to amplify nine of the 12 fumonisin cluster genes tested. We also used the CD-ELISA method to confirm fumonisin production for our 62 Fusarium isolates. Only 15 isolates were found to be fumonisin-negative. Interestingly, genotypic characterization revealed six isolates with various gene deletion patterns that also tested positive for the production of fumonisins via CD-ELISA. Our findings confirm the importance of molecular studies for species delimitation, and for observing genetic and phenotypic diversity, among the Fusaria.
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Aiyaz Mohammed, Thimmappa Divakara Shetty, Mudili Venkataramana, George Moore Geromy, Kumar Gupta Vijai, i Yli-Mattila Tapan, Chandra Nayaka Siddaiah and Ramachandrappa Niranjana Siddapura, Molecular Diversity of Seed-borne Fusarium Species Associated with Maize in India, Current Genomics 2016; 17 (2) . https://dx.doi.org/10.2174/1389202917666151116213056
DOI https://dx.doi.org/10.2174/1389202917666151116213056 |
Print ISSN 1389-2029 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5488 |
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