1,212 research outputs found
Understanding sheath blight resistance in rice: the road behind and the road ahead
Rice sheath blight disease, caused by the basidiomycetous necrotroph Rhizoctonia solani,
became one of the major threats to the rice cultivation worldwide, especially after the adoption
of high-yielding varieties. The pathogen is challenging to manage because of its extensively
broad host range and high genetic variability and also due to the inability to find any satisfactory
level of natural resistance from the available rice germplasm. It is high time to find remedies to
combat the pathogen for reducing rice yield losses and subsequently to minimize the threat to
global food security. The development of genetic resistance is one of the alternative means to
avoid the use of hazardous chemical fungicides. This review mainly focuses on the effort of
better understanding the host–pathogen relationship, finding the gene loci/markers imparting
resistance response and modifying the host genome through transgenic development. The latest
development and trend in the R. solani–rice pathosystem research with gap analysis are
provided
Improving Information and Performance in Grain Marketing: an Assessment of Current Market Information Systems, and Recommendations for Developing a Public Grain MIS
This paper focuses on one dimension which is at the core of all modern economies: how to provide private and public agents with timely and accurate information regarding current and expected future market conditions. Its objective is to show the need for a public market information system for agricultural markets in Ethiopia, and to present concrete proposals that can be reviewed, debated, and modified as necessary by the relevant Ethiopian authorities in collaboration with Food Security Research Project (FSRP) personnel.food security, food policy, Crop Production/Industries, Marketing, Q18,
High resolution mapping of restoration of fertility (Rf) by combining large population and high density genetic map in pigeonpea [Cajanus cajan (L.) Millsp]
Background: Restoration of fertility (Rf) is an important trait for pigeonpea hybrid breeding. Few coarse
quantitative trait locus (QTL) studies conducted in the past identified QTLs with large confidence intervals on the
genetic map and could not provide any information on possible genes responsible for Rf in pigeonpea. Therefore, a
larger population comprising of 369 F2s derived from ICPA 2039 Ă— ICPL 87119 was genotyped with high density
Axiom Cajanus SNP Array with 56 K single nucleotide polymorphism (SNPs) for high resolution mapping of Rf.
Results: A genetic map with 4867 markers was developed and a total of four QTLs for Rf were identified. While one
major effect QTL (qRf8.1) was co-localized with the QTL identified in two previous studies and its size was refined
from 1.2 Mb to 0.41 Mb. Further analysis of qRf8.1 QTL with genome sequence provided 20 genes including two
genes namely flowering locus protein T and 2-oxoglutarate/Fe (II)-dependent dioxygenases (2-ODDs) superfamily
protein with known function in the restoration of fertility.
Conclusion: The qRf8.1 QTL and the potential candidate genes present in this QTL will be valuable for genomicsassisted
breeding and identification of causal genes/nucleotides for the restoration of fertility in the hybrid
breeding program of pigeonpea
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