PowerPoint Presentation

Som K., Belem J. and Garane A.DEVELOPMENT OF SWEETPOTATO VARIETIES IN BURKINA FASO

Accra, 25-26th February 2013

Sweetpotato production and utilization is getting increase in Burkina

These last 10 years the production has evolved from 27000 tons in 2000 to 141000 tons in 2011 representing an increase of more than 400%

Yields are unstable and varied between 6 and 18 t/ha depending on the year

Evolution of sweetpotato production and yield from 2000 to 2011Most sweetpotato materials used are farmers varieties

There are dominated by those with white fleshed

Are late maturing (4 to 6 months)

Small storage root size

However, resistant to most of virus strains and have good storage ability

Farmers variety in the Eastern regionProduction constraintsFrequencyPercentageRankWeevil damages2960,41Susceptibility to poor soil2654,22Disease occurrences2347,93Lack of reliable market1735,44Planting materials12255Susceptibility to drought12255Storage ability12255Unadapted Variety918,88 Lack of Processing12,19Bad cooking ability12,19Major production constraints ranked according to their importance (2010)TraitsFrequences PercentageRankHigh yield3572,91Big storage root3368,82Good market appeal3164,63Resistant to weevil2347,94Early maturing2245,85Cooking quality1939,66Numerous storage root1531,37Skin color1531,38Tolerance to drought1122,99Non sweet storage root1327,110Orange flesh storage root714,611Good taste714,611Hard storage root (high DM)24,213Processing24,213Good presentation (not too big with smooth skin) 24,213Storage ability24,213Desired traits identified and rankend by farmersBreeding objectivesTo develop high yielding sweetpotato with high beta-carotene content as a contribution to food security and with the potential to alleviate malnutrition in Burkina Faso.

Specifically, to:

develop high yielding varieties with wide to specific adaptation to the local agro-ecological contexts

select varieties with high nutritional values (OFSP, with regard to the DM content)

Ensure that developed varieties met farmers and consumers expectations

STRATEGIES ADOPTEDVariety development through controlled crossed of divergent parents

Seed germination and vine multiplication

On station evaluations in 2 years and 3 different agro-ecological zones

On farm evaluation in collaborative with CRS, HKI and FDC in numerous other zonesMajor resultsParental combinations to obtain better yield, high beta-carotene, good dry matter content knownBF59 and BF77 crossed well with Tainung to give good yieldBF82 cross well with CIP-199062-1 and TIB-440060 to give F1 with orange flesh

Promising varieties identified for further evaluation with farmers identified GenotypesRoot yield (t/ha)Upgr BiomYield (t/ha)-carotene (mg/100g of fresh weight)Virus2DM%IrwgtBF82xTainung-820.3316.330.482.3323.2179.15BF82xTainung-2019.6717.230.783.3321.82242.68BF82xCIP-1718.5614.783.921.1728.45118.18BF80xTainung-218.1111.8922.3319.27203.89BF82xTainung-2417.8325.898.29121.79136.43BF92xCIP-617.1117.836.441.8326.61175.9BF59xCIP-416.7821.568.321.8324.81116.15BF24xTIB-316.1717.287.662.6727.33116.72BF59xTIB-615.2211.394.362.3321.48275.94BF82xCIP-1815.2230.112.321.522.81186.07BF59xCIP-113.5618.338.321.1727.09110.82BF82xTIB-413.510.331.032.1730.06145.36The Best twelve F1 genotypes that had significantly higher yield than the best check BF82xTainung-8 (20.33 t/ha)

BF82xTainung-24 (17.83 t/ha) BF59xTainung-5 (54.66 t/ha) White flesh

GenotypesRoot yieldBiomYield-carotene (mg/100 g fw)Virus2DM%IrwgtBF82xTIB-87.781110.852.6725.71105.23BF82xCIP-139.89129.961.3330.8659.42BF92xCIP-84.5613.179.571.6722.54101.08BF92xTIB-210.4515.59.41231.61170.54The four F1 genotypes that had significantly higher beta-carotene than the best check (BF14 with 8.35)The higher bet-carotene genotypes have small yieldGenotypesRoot yieldBiomYield-caroteneVirus2DM%IrwgtBF82xTainung-117.7813.110.871.6732.15109.6BF92xTIB-210.4515.59.41231.61170.54BF82xCIP-139.89129.961.3330.8659.42BF82xTIB-413.510.331.032.1730.06145.36BF82xTIB-912.515.060.632.1729.59105.81BF82xCIP-1111.9411.674.131.8328.89104.26BF59xTIB-48.3316.677.012.1728.81104.31BF82xCIP-1718.5614.783.921.1728.45118.18The eight F1 genotypes that have dry matter content higher than 28%Have low yield and ,When yield acceptable, beta-carotene content lowGenotypesRoot yieldBiomYield-caroteneVirus2DM%IrwgtBF82xCIP-1111.9411.674.131.8328.89104.26BF82xCIP-1718.5614.783.921.1728.45118.18The two F1 genotypes that had higher yield than the best yielding check, good beta-carotene content and dry matter content over 28%

Existing OFSP evaluated with farmers Well appreciated in the Eastern Region

Well appreciated in the Central and Southern Regions RegionTraining of farmers in collaboration with partners (HKI, CRS) Clean vine multiplication

Protection from pests and diseases (farmers experiences shared)

We learnt from farmers how to control sweetpotato weevil in the field

THANK YOU