Seedling and adult plant resistance to <i>Pyricularia oryzae</i> in Ethiopian rice cultivars

Gerema, Geleta; Mengistu, Girma; Kebede, Megersa; Lule, Dagnachew; Desalegn, Kebede; Birahanu, Chemeda; Debela, Megersa

doi:10.2478/ausae-2020-0004

Acta Universitatis Sapientiae, Agriculture and Environment

2020

DOI: 10.2478/ausae-2020-0004

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Seedling and adult plant resistance to Pyricularia oryzae in Ethiopian rice cultivars

Geleta Gerema¹,

Girma Mengistu

Megersa Kebede³

et al.

Abstract: Two separate experiments were done for seedling and adult resistance in rice varieties against blast. Each experiment consists of 20 varieties and is evaluated under artificial inoculation with blast. The result of the study confirmed that NERICA varieties have shown low disease infection at the seedling stage whereas the varieties Chewaka and Edget have shown adult plant resistance. Severe yield reduction and highly diseased grain were obtained from Superica-1, which is highly susceptible at adult plant stage… Show more

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Cited by 2 publications

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Rice Farmgate Price Estimation and Collection Modality in Oromia, Ethiopia

Hailu

2024

AJOMIS

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The main aim of this analysis to estimate minimum farmgate price for paddy rice and to indicate paddy rice collection modalities from farmers and provide an overview of current rice production status in Oromia. Rice (Oryza sativa) is one of the most stable foods and expected to contribute to ensuring food security in Ethiopia. The success of rice production depends somewhat on its high yield potential, processing technologies and marketing facilities. Improving rice production and productivity as well as facilitating its processing and marketing access is therefore one of a key part of the economic growth strategies in the Oromia government’s food self-sufficiency initiatives. Both local production and import are the two key sources of rice grain supply and meet consumption demand of Oromia people. Consumption trends in Oromia as well as in Ethiopia have shown a substantial increase from time to time. Using a quantitative secondary data and a review of existing literature, this study provides an overview of the rice production and estimating the farmgate price of paddy rice. The study stresses the need for estimation of farmgate price, formulation of rice processing technologies and market-enhancing policies, such as supplying and installing rice processing technologies, better access to market facilities and market information and to improve rice productivity.

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Rice Farmgate Price Estimation and Collection Modality in Oromia, Ethiopia

Hailu

2024

AJOMIS

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QTL-Seq Approach Identified Pi63 Conferring Blast Resistance at the Seedling and Tillering Stages of Thai Indigenous Rice Variety “Phaladum”

et al. 2022

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Rice blast (BL) caused by Magnaporthe oryzae is a fungal disease causing significant yield losses in rice production worldwide. To overcome the breakdown of resistance by the rapid adaptation of pathogens, identifying resistance (R) genes or QTLs in indigenous rice, which harbors the R genes that co-evolved with the local pathogen race, is necessary. In this study, a recombinant inbred line (RIL) population derived from a cross between RD6 and Phaladum (PLD) was used to map quantitative trait loci (QTL) for BL resistance through a QTL-seq approach. A single QTL (qBLchr4) associated with BL resistance at the seedling and maximum tillering stages was mapped on the long arm of chromosome 4. Five genes, LOC_Os04g0616600, LOC_Os04g0617900 (OsGLP4-1), LOC_Os04g0619600 (OsRLCK161), LOC_Os04g0620800 (Pi63), and LOC_Os04g0621500, were considered the candidate genes representing qBLchr4. Subsequently, the Kompetitive Allele-Specific PCR (KASP) markers specific for the SNP variant and position of each gene were designed for validation in the mapping population. These markers showed the high phenotypic variance explained (PVE) values in all testing methods and/or environments, signifying the major effect of qBLchr4. Among these markers, the Pi63-KASP marker explained the highest and most stable phenotypic variation across all testing methods and/or environments, with 84.18%, 80.34%, and 23.43% in the upland short row (USR) method, Sila environment, and Mueang environment, respectively. Therefore, Pi63 was suggested to be the strongest candidate gene. These results represent the potential utility of future BL resistance breeding and/or pyramiding using marker-assisted selection (MAS).

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Seedling and adult plant resistance to Pyricularia oryzae in Ethiopian rice cultivars

Cited by 2 publications

References 25 publications

Rice Farmgate Price Estimation and Collection Modality in Oromia, Ethiopia

Rice Farmgate Price Estimation and Collection Modality in Oromia, Ethiopia

QTL-Seq Approach Identified Pi63 Conferring Blast Resistance at the Seedling and Tillering Stages of Thai Indigenous Rice Variety “Phaladum”

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