1. Evaluation of advanced Cowpea lines for agronomic traits, yields, and response to cowpea scab caused by Sphaceloma spp. Dry Land Legume Research Program National Semi-Arid Resources Research Institute (NaSARRI), Serere Authors: Amayo R., Omadi J.R. Okwang D. and Obuo J.P

2. Content of the Presentation Research Background Research Objective Materials and methods Results / Research outcome Conclusion and Recommendation Acknowledgement

3. Research Background Cowpea (a poor man’s meat), is an economically important legume crop grown widely in the Semi-Arid regions. Fresh pods Cowpea bread Quality grains Fresh pod meal Fresh pods read for market Cowpea flour

4. Background Cont’d The major constraints to production and productivity of cowpea Foliar chewing pests Cowpea aphid Cowpea scab Cowpea leaf blight Storage pests

5. Research Objective This study was designed to contribute to enhancement of cowpea production through screening cowpea lines for different crop attributes including agronomic performance, pod and grain yield, and resistance/tolerance to cowpea scab.

6. Materials and methods Eleven (11) cowpea lines comprising four improved local varieties and seven promising lines were evaluated. Field evaluations for yield and growth attributes were carried out in the second rains of 2010, the two rain seasons of 2011 and in the first rain of 2012

7. Materials and methods FIELD RESISTANCE / TOLERANCE TRIALS

8. Research Results Treatments Means Plant Height (cm)Number of BranchesDays to 50% floweringDays to 75% PoddingDays to 95% Maturity 20102011 average 20102011 average 20102011 average 20102011 Average 20102011 Average Mat period ACC1133.1232.3732.745554445 54 77 23.0 ACC2535.2034.3034.756564748 56 78777821.0 NGOJI43.5444.4744.0155545 54555673 19.0 ACC2344.1244.3344.235554546 56 74 18.0 ACC2642.6041.5742.0866644 5455 77 23.0 SECOW 2W 37.8638.2038.0355546 5657 76 20.0 ACC1234.5635.5035.0376744434457565776 19.0 ACC235.8236.1035.9665644 54 75 7621.0 F. Pr.0.0060.0080.014nsNs ns 0.050.0150.020.002 %CV2.84.22.12.82.42.12.53.22.82.31.92.41.11.00.96.6 SED1.983.072.040.840.420.414.513.362.51.570.861.20.901.040.51.21 Average Means of the agronomic traits of the promising cowpea lines in relation to SECOW 2W measured in 2010 and 2011 growing seasons

9. Results cont’d Treatment s Means Pod length (cm)Number of pods/plantNumber of seeds/pod100 seed weight (g)Grain yield Kg/Ha 20102011average20102011 averag e 20102011 averag e 20102011average20102011Average ACC1113.4311.8712.6545384214131410.677.909.281,7591,2181,488 ACC2517.3716.0716.724239411617 15.0015.2015.102,8701,7592,314 NGOJI18.1314.5016.324740441718 15.3311.3713.352,3611,6201,990 ACC2317.8715.2016.5440394018171815.6711.7713.722,2221,3191,770 ACC2612.8015.2714.0442283513121316.6715.8716.272,6161,7822,199 SECOW 2W 16.8315.9016.3641323715 15.6710.7313.22,0141,8521,933 ACC1216.9014.2715.5841303616 11.529.6310.571,5289261,227 ACC213.5014.0213.764231371617 15.0015.0315.011,9911,4351,713 F. Pr.0.002 nsNsns0.0030.0200.0080.006<0.001 0.0170.05 %CV1.81.61.51.01.72.1 1.11.32.75.23.17.911.88.3 SED1.240.790.881.862.751.780.841.661.40.880.980.76322.9483.2286.3 Average Means of the yield components and grain yield of the promising cowpea lines in relation to SECOW 2W measured in 2010 and 2011 growing seasons

10. Results cont’d Mean Rainfall (millilitres) Mean Temperature ( ̊ C) Year201020112012201020112012 1 st Season-78.2876.04-23.125.45 2 nd Season102.37130.72-24.522.2- Differences in weather condition in 2010, 2011and 2012 growing seasons

11. Results cont’d

12. Conclusions Only two promising lines (ACC25 and ACC26) that out yielded SECOW 2W Majority of the promising lines were either erect or semi-erect Cowpea lines (SECOW 3B, SECOW 4W, SECOW 2W, ACC11, ACC12 and ACC2 that showed good resistance response

13. Acknowledgement ATAAS / WORLDBANK GoU

14. THERE IS ALWAYS SOME TO TAKE HOME!!!! THANK YOU