The 2012 RUFORUM Biennial Conference is the third in the series. The main objective of the Biennial conferences is to provide a platform for agricultural research for development stakeholders in Africa and beyond to actively exchange findings and experiences, while at the same time learning lessons towards improving performance of the agricultural sector and ultimately people’s livelihoods. The biennial conference is RUFORUM’s most comprehensive meeting for the diversity of stakeholers in agriculture. It is especially dedicated to graduate students and their supervisors, grantees in RUFORUM member universities and alumni. It is a platform for peer review, quality control, mentorship, networking and shared learning. The third Biennial Conference was attended by 657 participants.This record contains an extended abstract accepted under the theme of Crop Improvement
Inheritance of Resistance to Rice Yellow Mottle Virus in Interspecific and Intraspecific Rice in Uganda
Abstract:
Rice Yellow Mottle Virus sobemovirus (RYMV) has been
noticed as major constraint of both upland and lowland rice. It
is highly infectious, variable and several resistance-breaking
strains have been identified. The effective control was mainly
directed to breeding for resistance. The study aims to understand
the mechanism of resistance and number of genes conferring
resistance to rice yellow mottle virus (RYMV) in interspecific
and intraspecific rice. The Research is being conducted at
National Crop Resources Research Institute. Nine genetic
materials, 5 susceptible and 4 resistant have been used in full
diallel crossing design to generate F1’s. Preliminary data showed
that the interspecific lines were cross-compatible with genetic
materials resistant to RYMV. This indicates that the interspecific
lines can simply be used to generate new rice genotypes by
introgression or extraction of valuable genes in them. The
inheritance of resistance will be determined after a diallel
evaluation by inoculating F2’s + Parents and scoring for reaction
to the virus. Furthermore, this study aims to estimate heritability
of resistance to RYMV within advanced generations (F3, F4
& F5). Preliminary data showed that regression of F4 bulk on
F3 progeny rows was significant for number of tillers (P<0.05),
but was not significant for plant height (P>0.05). Heritability
for various traits indicates that selection should be successful
for most traits.
Le virus de panachure jaune de riz sobemovirus (RYMV)
a été remarqué comme la contrainte majeure à la fois pour le
riz des montagnes et celui des plaines. Il est très contagieux, et
plusieurs souches variables de résistance remarquable ont été
identifiées. Le contrôle effectif a été principalement dirigé vers
la sélection pour la résistance. L’étude vise à comprendre le
mécanisme de résistance et le nombre de gènes conférant une
résistance au virus de la panachure jaune du riz (RYMV) dans
le riz interspécifique et intraspécifique. La recherche est menée
Language:
English
Extended abstracts submitted under Crop Improvement
Date of publication:
2012
Country:
Region Focus:
East Africa
Collection:
RUFORUM Conferences and Workshops
Agris Subject Categories:
Agrovoc terms:
Additional keywords:
Licence conditions:
Open Access
Access restriction:
Form:
Printed resource
Publisher:
Notes:
