Abstract

Abstract:

In sub-Saharan Africa, the demand for higher rice production continues to grow rapidly. Although there is a huge potential for increasing rice production through expansion of the rice cultivation area in wetlands, iron (Fe) toxicity tends to occur and consequently results in low rice yield. Development and deployment of varieties tolerant to Fe toxicity is one of the practical options to overcome this constraint. Several tolerant varieties have been developed through conventional breeding but progress in breeding has been generally slow mainly due to large genotype × environment interaction and field heterogeneity, which make rice selection ineffective. In addition, there are no valid managed-stress screening protocols which are highly efficient and that can predict rice performance in the diverse target environments of West Africa. Many O. glaberrima accessions have superior tolerance, but only a few of them have been utilized in breeding programs. The known quantitative trait loci (QTLs) related to Fe toxicity, have not been used for marker-assisted selection (MAS), as they gave small effects with a large confidence interval. Accelerating rice breeding efficiency for tolerance to Fe toxicity requires establishment of reliable screening protocols, use of O. glaberrima accessions as donors, identification of large-effect QTLs and MAS using such QTLs. This paper reviews the past and current efforts in West Africa to develop new varieties with superior tolerance to Fe toxicity.

Details

Title
Genetic Improvement of Iron Toxicity Tolerance in Rice-Progress, Challenges and Prospects in West Africa
Author
Sikirou, Mouritala 1 ; Saito, Kazuki 2 ; Achigan-Dako, Enoch G 3 ; Dramé, Khady Nani 4 ; Ahanchédé Adam 5 ; Ramaiah Venuprasad 6 

 University of Abomey, Calavi, 01 BP 526 Cotonou, Bénin; Africa Rice Center 01 BP 2031 Cotonou, Bénin 
 Africa Rice Center 01 BP 2031 Cotonou, Bénin 
 Horticulture and Genetics Unit, Faculty of Agronomic Sciences, University of Abomey-Calavi BP 2549 Abomey Calavi, Bénin 
 Africa Rice Center (Africa Rice), P.O. Box 33581, Dar-es-Salaam, Tanzania 
 University of Abomey, Calavi, 01 BP 526 Cotonou, Bénin 
 AfricaRice Nigeria Station, c/o IITA, PMB 5320, Ibadan, Nigeria 
Pages
423-434
Publication year
2015
Publication date
Jan 2015
Publisher
Taylor & Francis Ltd.
ISSN
1343943X
e-ISSN
13491008
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
3089964871
Copyright
© 2015 Crop Science Society of Japan. This work is licensed under the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.