| dc.contributor.author | Okechukwu, R.U. |
| dc.contributor.author | Dixon, Alfred G.O. |
| dc.date.accessioned | 2019-12-04T11:14:47Z |
| dc.date.available | 2019-12-04T11:14:47Z |
| dc.date.issued | 2008 |
| dc.identifier.citation | Okechukwu, R.U. & Dixon, A.G.O. (2008). Genetic gains from 30 years of cassava breeding in Nigeria for storage root yield and disease resistance in elite cassava genotypes. Journal of Crop Improvement, 22(2), 181-208. |
| dc.identifier.uri | https://hdl.handle.net/20.500.12478/2854 |
| dc.description.abstract | Cassava (Manihot esculenta Crantz) is crucial for both
food security and poverty alleviation in Sub-Saharan Africa (SSA).
Cassava improvement for SSA started at the International Institute of Tropical
Agriculture in 1970, and several improved lines with different characteristics
have been developed to date. The primary focus of breeding work
has been to increase root yield, early bulking, tolerance to biotic and abiotic
stresses, and increased dry matter content. This paper represents a
study of 112 varieties cloned and introduced between 1970 and 2000, and
evaluated in 2003 and 2004 to quantify genetic gains in root yield and disease
resistance. The genetic gain per year was 1.3% for fresh root yield,
1.2% for dry root yield, 0.65% for cassava mosaic disease resistance,
0.21% for cassava anthracnose disease resistance, and -0.03% for cassava bacterial blight disease resistance. Though there was no statistical significance
in the net negative genetic gain in cassava bacterial blight resistance,
it is essential that more emphasis be placed on improving this trait to
enhance stability and productivity in African environments. |
| dc.language.iso | en |
| dc.subject | Cassava Improvement |
| dc.subject | Genetic Gain |
| dc.subject | Cassava Diseases |
| dc.subject | Disease Resistance |
| dc.subject | Multiple Trait Selection |
| dc.title | Genetic gains from 30 years of cassava breeding in Nigeria for storage root yield and disease resistance in elite cassava genotypes |
| dc.type | Journal Article |
| dc.description.version | Peer Review |
| cg.contributor.affiliation | International Institute of Tropical Agriculture |
| cg.coverage.region | Africa |
| cg.coverage.region | West Africa |
| cg.coverage.country | Nigeria |
| cg.authorship.types | CGIAR single centre |
| cg.iitasubject | Genetic Improvement |
| cg.iitasubject | Plant Genetic Resources |
| cg.iitasubject | Markets |
| cg.iitasubject | Plant Production |
| cg.iitasubject | Food Security |
| cg.iitasubject | Disease Control |
| cg.iitasubject | Food Science |
| cg.iitasubject | Handling, Transport, Storage And Protection Of Agricultural Products |
| cg.iitasubject | Livelihoods |
| cg.iitasubject | Nutrition |
| cg.iitasubject | Plant Diseases |
| cg.accessibilitystatus | Limited Access |
| local.dspaceid | 93955 |
| cg.identifier.doi | https://dx.doi.org/10.1080/15427520802212506 |
