Mining of Indian wheat germplasm collection for adult plant resistance to leaf rust.

Autor: Kumar S; ICAR-National Bureau of Plant Genetic Resources, Pusa Campus, New Delhi, India., Phogat BS; ICAR-National Bureau of Plant Genetic Resources, Pusa Campus, New Delhi, India., Vikas VK; ICAR-Indian Agricultural Research Institute, Regional Station, Wellington, Tamilnadu, India., Sharma AK; ICAR-Indian Institute of Wheat & Barley Research, Karnal, India., Saharan MS; ICAR-Indian Institute of Wheat & Barley Research, Karnal, India., Singh AK; ICAR-National Bureau of Plant Genetic Resources, Pusa Campus, New Delhi, India., Kumari J; ICAR-National Bureau of Plant Genetic Resources, Pusa Campus, New Delhi, India., Singh R; ICAR-National Bureau of Plant Genetic Resources, Pusa Campus, New Delhi, India., Jacob SR; ICAR-National Bureau of Plant Genetic Resources, Pusa Campus, New Delhi, India., Singh GP; ICAR-Indian Institute of Wheat & Barley Research, Karnal, India., Sivasamy M; ICAR-Indian Agricultural Research Institute, Regional Station, Wellington, Tamilnadu, India., Jayaprakash P; ICAR-Indian Agricultural Research Institute, Regional Station, Wellington, Tamilnadu, India., Meeta M; Punjab Agricultural University, Ludhiana, Punjab, India., Jaiswal JP; Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India., Shikha D; Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India., Honrao BK; Agharkar Research Institute, Pune, Maharashtra, India., Kalappanavar IK; University of Agricultural Sciences, Dharwad, Karnataka, India., Mishra PC; Zonal Agricultural Research Station (JNKVV), Powarkheda, Madhya Pradesh, India., Singh SP; Narendra Deva University of Agriculture and Technology, Faizabad, Uttar Pradesh, India., Vaish SS; Banaras Hindu University, Varanasi, Uttar Pradesh, India., Solanki VA; Sardarkrushinagar Dantiwada Agricultural University, Vijapur, Gujarat, India.
Jazyk: angličtina
Zdroj: PloS one [PLoS One] 2019 Mar 28; Vol. 14 (3), pp. e0213468. Date of Electronic Publication: 2019 Mar 28 (Print Publication: 2019).
DOI: 10.1371/journal.pone.0213468
Abstrakt: 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.
Competing Interests: The authors have declared that no competing interests exist.
Databáze: MEDLINE
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