Details for Evaluation of Regional On-farm Variety Trials in Eastern and Southern Africa 2011

Evaluation of Regional On-farm Variety Trials in Eastern and Southern Africa 2011
PropertyValue
Name:Evaluation of Regional On-farm Variety Trials in Eastern and Southern Africa 2011
Description:

In 2006, the Drought Tolerant Maize for Africa (DTMA) project was initiated withthe aim of improving maize germplasm in the drought prone mid-altitude regions ofeastern and southern Africa (ESA). Through this project eight hybrids and four openpollinatedvarieties (OPVs) were developed through multi-location trials under optimal(well fertilized and well-watered conditions), rainfed, low soil nitrogen and manageddrought stress environments. To validate the performance of the new germplasm againstcommercially available germplasm and farmer-preferred varieties, a series of trials wereconducted across 49 farmers’ fields in eight countries in 2010/11 seasons in ESA. Trialswere un-replicated and conducted under farmer management, with farms consideredblocks in a randomized complete-block design. Average trial yields ranged from 0.7 t ha-1 to above 8 t ha-1. Trials were divided into two categories based on yield levels; high yieldingtrials >=3 t ha-1 (n = 30 trials) and low yielding trials < 3 t ha-1 (n = 19 trials). Broad senseheritability of high and low yielding trials was 0.80 and 0.62 to 0.94 and 0.61, respectively,indicating that highly repeatable means can be estimated from un-replicated on-farmtrials in ESA. The best new DTMA hybrids out-yielded the farmers’ own varieties by morethan 35% and 50% under low- and high-yield conditions, respectively, when compared to SC513, the most widely grown commercially hybrid available varieties in southern Africa.

Filename:On-farm Trials ESA 2011 Smallest.pdf
Filesize: 1.1 MB
Filetype:pdf (Mime Type: application/pdf)
Creator:rlopez
Created On: 09/21/2012 10:29
Viewers:Everybody
Maintained by:Editor
Hits:4379 Hits
Last updated on: 09/21/2012 10:38
Homepage: