Abstract:
Sources of resistance to A. flavus have been identified
elsewhere but no such materials are currently available for use
by the maize improvement program in Uganda. The goal of
this study was to initiate breeding for resistance to the fungus
by identifying maize inbred lines, testers and hybrids that show
high resistance to Aspergillus flavus and field accumulation
of aflatoxin through: (1) screening inbred lines, testers and
hybrids for resistance, (2) determining general and specific
combining ability associated with resistance and determining
the relationship between traits associated with resistance.
Results indicated a highly significant variation (P<0.001) in
resistance among inbred lines and testers. Testcrosses also
showed significant variability (P<0.05). Inbred lines showed a
significant GCA for kernel infection rate while testers showed
significant GCA for severity of infection (P<0.05). SCA for
both kernel infection rate and severity was non significant.
Les sources de résistance à l’ A. flavus ont été identifiées ailleurs
mais aucun matériau n’est actuellement disponible à l’usage
par le programme d’amélioration de maïs en Ouganda. Le but
de cette étude était de lancer le programme de lutte contre le
mycète en identifiant les souches pures de mais, les échantillonstest
et les hybrides de maïs qui montrent de haute résistance à
l’accumulation d’ Aspergillus flavus et de champ de l’aflatoxine
à travers : (1) l’examen des souches pures, des échantillonstest
et des hybrides pour la résistance, (2) la détermination de
la capacité de combinaison générale et spécifique associée à la
résistance et la determination du rapport entre les traits liés à la
résistance. Les résultats ont montré une variation fortement
significative (P<0.001) de résistance parmi les souches pures
et les échantillons-test. Les techniques de croisement ont montré
aussi une variabilité significative (P<0.05). Les souches pures ont montré un GCA significatif pour le taux d’infection de grain
tandis que les échantillons-test montraient un GCA significatif
pour la sévérité de l’infection (P<0.05). SCA pour le taux
d’infection et la sévérité de grain était non significatif.
Language:
English
Date of publication:
2010
Country:
Region Focus:
East Africa
University/affiliation:
Collection:
RUFORUM Conferences and Workshops
Agris Subject Categories:
Agrovoc terms:
Additional keywords:
Licence conditions:
Open Access
Access restriction:
Form:
Printed resource
Publisher:
ISSN:
E_ISSN:
Edition:
Extent:
299-302
Notes:
"The 2010 RUFORUM Biennial Conference was the second 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. This record contains an extended abstract accepted under the theme diseases".
