Impact of weather parameters on the occurrence of brown rust and germplasm screening against yellow (Puccinia striiformis f.sp. tritici) and brown rust (Puccinia triticina Erisk) of wheat (Triticum aestivum L.)

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dc.contributor.advisorDeepshikha
dc.contributor.authorJoshi, Vasundhra
dc.date.accessioned2022-12-25T14:19:27Z
dc.date.available2022-12-25T14:19:27Z
dc.date.issued2022-10
dc.description.abstractWheat (Triticum aestivum L.) is most elementary and basic cereal crop consumed by 2.5 billion of world population. The most devastating pathogens which affect wheat worldwide are leaf or brown rust, stripe rust or yellow rust and black rust or stem rust. Out of these leaf and stripe rust appear periodically on wheat crop and induce heavy losses in yield. Although application of chemical is emergent tool for the management of rust but it is not an sustainable and economic way to eradicate rust. Partial resistance, gene deployment for developing resistant variety are some ways to control leaf and stripe rust in effective way. Also Epidemiological studies help us to understand the development and progress of disease and establish correlation between environmental factors and disease development. The present studies were carried out with the following objectives 1. Screening of germplasms of wheat for disease resistance against leaf and stripe rust under epiphytotic conditions 2.analysis of disease severity with Area under progress curve 3.To determine the role of weather parameters on leaf rust disease development in wheat. In the study Out of 158 germplasm accession ,48 accessions were found phenotypically resistant to stripe rust (numbered as 10, 121, 122, 123, 130, 129, 139, 152, 155, 156, 37, 1, 19, 21, 41, 18, 22, 23, 27, 45, 52, 58, 62, 65, 72, 74, 77, 78, 82, 84, 86, 88, 91, 92, 93, 94, 2, 5, 8, 104, 107, 109, 111, 113, 117, 118, 134, 136) and 12 accessions were found resistant to leaf rust (numbered as 1, 115, 118, 61, 41, 138, 136, 145, 40, 152, 42 & 116). Lower Audpc was observed in 46 accessions (accession number 10, 121, 122, 123, 130, 129, 139, 152, 155, 156, 37, 1, 19, 21, 41, 18, 22, 23, 48, 52, 58, 62, 65, 72, 74, 77, 82, 84, 86, 88, 91, 92, 93, 2, 5, 8, 104, 107, 109, 111, 113, 117, 118, 125, 134 & 136) for stripe rust and in 11 acessions(accession number 1, 118, 61, 138, 136, 145, 40, 152, 115, 42, 116) for leaf rust. Study of correlation of disease severity of leaf rust with weather parameters reveal that there was increase in minimum and maximum temperature with disease severity and decline was observed in relative humidity(morning) and relative humidity (evening) and negative significant correlation was observed with rainfall and number of rainy days. Also through multiple regression analysis the R2 was calculated more than 90 per cent for the year 2020-21.en_US
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810190777
dc.keywordswheat, brown rusten_US
dc.language.isoEnglishen_US
dc.pages51en_US
dc.publisherG.B. Pant University of Agriculture and Technology, Pantnagar, District Udham Singh Nagar, Uttarakhand. PIN - 263145en_US
dc.research.problemWheaten_US
dc.subPlant Pathologyen_US
dc.themeBrown rusten_US
dc.these.typeM.Scen_US
dc.titleImpact of weather parameters on the occurrence of brown rust and germplasm screening against yellow (Puccinia striiformis f.sp. tritici) and brown rust (Puccinia triticina Erisk) of wheat (Triticum aestivum L.)en_US
dc.typeThesisen_US
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