Leaf rust ( Puccinia triticina Eriks.) is a fungal disease of wheat ( Triticum spp.), which causes considerable yield loss. Adult plant resistance (APR) is one of the most sustainable approaches to control leaf rust. In this study, field-testing was carried out across ten different locations, followed by molecular screening, to detect the presence of APR genes, Lr34 +, Lr46 +, Lr67 + and Lr68 in Indian wheat germplasm. In field screening, 190 wheat accessions were selected from 6,319 accessions based on leaf tip necrosis (LTN), disease severity and the average coefficient of infection. Molecular screening revealed that 73% of the accessions possessed known APR genes either as single or as a combination of two or three genes. The occurrence of increased LTN intensity, decreased leaf rust severity and greater expression of APR genes were more in relatively cooler locations. In 52 lines, although the presence of the APR genes was not detected, it still displayed high levels of resistance. Furthermore, 49 accessions possessing either two or three APR genes were evaluated for stability across locations for grain yield. It emerged that eight accessions had wider adaptability. Resistance based on APR genes, in the background of high yielding cultivars, is expected to provide a high level of race non-specific resistance, which is durable.
The study aimed to isolate and identify seed-borne fungi associated with five stored grain cultivars of rice. The seeds samples of five rice varieties, GR-4, GNR-3, GNR-4, Gurjari and NAUR-1 were procured from Main Rice Research station, Navsari Agriculture University. The five seed samples was stored in cloth bag. The blotter paper and agar plate methods were used to identification of seed borne fungi.The fourfungal genera, Aspergillus, Curvularia,Cheatomiumand Fusarium was found to be prominently associated with different seeds of rice cultivars after 8 months of storage. The numbers of fungi were found to be increased during the storage period. The association of 10 fungus species viz., Aspergillus candidus Aspergillus flavus, Aspergillus nidulans, Aspergillus niger,Aspergillus sp., Cheatomiumsp., Curvularialunata, Curvularia sp., Fusarium moniliforme and Fusarium sp. were found. Among them, the most predominant was Curvularialunata (19.46%). The lowest (17.07%) of association of fungi was observed in cultivar GNR-3.How to view point the article : Patel, Reena and Solanki, V.A. (2017). Seed borne mycoflora associated with rice seeds in south Gujarat. Internat. J. Plant Protec., 10(2) : 311-319,
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