Evaluation of Elite Potato Clones for   Drought Tolerance in Western              Uganda  Imelda Kashaija, Vasiter Kesiime...
Introduction• Potato, Solanum tuberosum L., is grown by  300,000 smallholder households in Uganda• 689,000 tons on 101,000...
• Potato production is being affected by  fluctuation in precipitations in both timing and  amount,• Increased temperature...
Increase in temperaturegreatly affected tuber                          MUBUKUquality and yield                            ...
• Substantial potato production is expanding  into locations at lower altitudes, where  drought is more common.• Therefore...
Objectives• Identifying potato clones resilient to water  and heat stress• Determining the effect of temperatures on the  ...
Materials and MethodsGenetic materials• A set of nine potato clones bred for drought  tolerance (393077.159, 396038.107, 3...
Materials and MethodsScreening• Two consecutive seasons on- station• One season on - farm• In three sites with contrasting...
Materials and Methods• For on-farm trials, farmer participation was  right away from planting and a group of 10  farmers (...
M&MFarmers evaluatingElite clones atMbarara (Mwizii)duringflowering, based onvigour, resistance topests and diseasesand th...
M &MFarmer participatory evaluation• Farmer group from Kalengyere voted for  vigour, erect stems and resistance to disease...
Data collectionNumber of flowered plants, number of flowers, height to the 1stleaf, number of stems, plant height, number ...
ResultsFarmer participatory evaluation• Weak significant differences were observed among the farmers’   selection at Kalen...
ResultsAt harvesting stage, farmers in• Kalengyere based selection on high yield with  many and big tubers, free from dise...
Mean scores given to each clone at flowering and harvesting                 Mean    Clone        Kalegyere   Mwizi   Isule...
• Selection by farmers at flowering stage did not  necessarily march that done at harvesting stage, but was  somehow relat...
ResultsClone performance: Yield• Analysis of variance from the three on-station trials  revealed high significant differen...
ResultsClone performance on farm                            MSSource of variation   d.f   Y/HA       WT         TNTRep str...
Performance of clones in different siteClone          KLG     MBZD        MUB          MWONGYERA MWIZI         ISULE      ...
Results• Of the twelve clones evaluated, six gave above 10t/ha implying  that they can be grown in the three agroecologies...
Results• Kalegyere offers a homely environment for potato  growing and this explains the high yield obtained  both on stat...
Growth Parameters• Variation was observed for all the tested parameters at the six sites• Clones showed significant differ...
Way Forward• Final farmer participatory selection of  promising clones at flowering and harvesting  stages (2 seasons).• I...
Acknowledgement• Funding Agency• All partners
THANK YOU
Evaluation of elite potato clones for drought tolerance in western Uganda
Upcoming SlideShare
Loading in...5
×

Evaluation of elite potato clones for drought tolerance in western Uganda

982
-1

Published on

Presented by Imelda Kashaija, Vasiter Kesiime and Prossy Namugga (Kachwekano Zonal Agricultural Research and Development Institute (NARO- KAZARDI)) at the First Bio-Innovate Regional Scientific Conference, Addis Ababa, Ethiopia, 25-27 February 2013

Published in: Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
982
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
13
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Evaluation of elite potato clones for drought tolerance in western Uganda

  1. 1. Evaluation of Elite Potato Clones for Drought Tolerance in Western Uganda Imelda Kashaija, Vasiter Kesiime and Prossy Namugga Kachwekano Zonal Agricultural Research and Development Institute (NARO- KAZARDI) First Bio-Innovate Regional Scientific Conference United Nations Conference Centre (UNCC-ECA) Addis Ababa, Ethiopia, 25-27 February 2013
  2. 2. Introduction• Potato, Solanum tuberosum L., is grown by 300,000 smallholder households in Uganda• 689,000 tons on 101,000 hectares per year• Major production areas are the highlands of Southwestern, parts of Eastern and Northwestern Uganda.• Its cultivation has spread to non-traditional areas in central Uganda
  3. 3. • Potato production is being affected by fluctuation in precipitations in both timing and amount,• Increased temperatures reduce productivity.• Drought prevents Potato from realizing full genetic potential leading to harvest losses.• In potato, water deficit leads to reduced yield and tuber quality
  4. 4. Increase in temperaturegreatly affected tuber MUBUKUquality and yield KALEGYEREMBARARA
  5. 5. • Substantial potato production is expanding into locations at lower altitudes, where drought is more common.• Therefore drought stress mitigation measures and coping mechanisms need to be devised to face future challenges of climate change
  6. 6. Objectives• Identifying potato clones resilient to water and heat stress• Determining the effect of temperatures on the performance of the selected clones.
  7. 7. Materials and MethodsGenetic materials• A set of nine potato clones bred for drought tolerance (393077.159, 396038.107, 396034.103, 396015.6, 396031.108, 391046.14, 395111.13, 395029.250 and 391691.96) were introduced from CIP• Varieties; Kachpot 1 (393382.44), Nakpot 5 (381471.18) and Victoria (381381.20) were used as checks.
  8. 8. Materials and MethodsScreening• Two consecutive seasons on- station• One season on - farm• In three sites with contrasting climatic conditions; Kabale (2400masl), Mbarara (1400masl) and Kasese (1000masl approx).
  9. 9. Materials and Methods• For on-farm trials, farmer participation was right away from planting and a group of 10 farmers (5 men and 5 women) was selected• Farmer evaluation was done at flowering and harvesting stages.• Selection of best 3 clones with traits for drought tolerance was based on agreed criteria by the whole group.
  10. 10. M&MFarmers evaluatingElite clones atMbarara (Mwizii)duringflowering, based onvigour, resistance topests and diseasesand then plants withmany flowers,
  11. 11. M &MFarmer participatory evaluation• Farmer group from Kalengyere voted for vigour, erect stems and resistance to disease and pest attack especially late blight.• While those in Kasese (Isule) selected basing on vigour, green leaves and erect stems .
  12. 12. Data collectionNumber of flowered plants, number of flowers, height to the 1stleaf, number of stems, plant height, number of branches, number ofleaves, number of leaflets, petiole lleaflet length, leafletwidth, length and leaf area. number of leaves between the previous5th and current 5th leaf (added leaves) .
  13. 13. ResultsFarmer participatory evaluation• Weak significant differences were observed among the farmers’ selection at Kalengyere and Isule, while there were highly significant differences among clones selected by farmers in Mwizi at flowering stage MS Source of Kalegyere Mwizi Isule variation Rep stratum 0.2 0.7 0.7 Clone 44* 98.5** 98.5* Residual 15.4 6.4 6.4
  14. 14. ResultsAt harvesting stage, farmers in• Kalengyere based selection on high yield with many and big tubers, free from diseases and pests, red coloured and round shaped tubers.• Mwizi based on disease and pest attack, high yielding (many large tubers).• Isule based on tuber size and number, freedom from pests and diseases.• No significant differences observed among genotypes from farmers’ selection at harvesting stage both within and across sites.
  15. 15. Mean scores given to each clone at flowering and harvesting Mean Clone Kalegyere Mwizi Isule Multilocation Flowering Harvesting 393077.159 14 9.5 1.5 7.3b 8.3 396038.107 2.5 0.0 4.0 2.3de 2.2 396034.103 6.0 3.5 10.5 1.7e 8.3 396015.6 0.0 0.5 1.0 2.7de 0.5 396031.108 7.5 2.0 4.0 3.7cde 4.5 391046.14 3.0 2.0 14.5 3.2de 6.5 395111.13 6.0 3.5 10.5 14.3a 6.7 395029.250 0.5 1.5 3.0 3.2bcde 1.7 391691.96 4.0 4.0 3.0 2.3de 3.7 393382.44 3.0 1.5 2.0 5.8bcd 2.2 381471.18 5.0 10.5 10 7.0bc 8.5 381381.20 9.0 11.0 1.0 5.3bcd 7.0
  16. 16. • Selection by farmers at flowering stage did not necessarily march that done at harvesting stage, but was somehow related.• However, some consistence was observed with their choices.• Further evaluation and selection can lead to the release of these clones as drought tolerant varieties since they are already liked by famers.
  17. 17. ResultsClone performance: Yield• Analysis of variance from the three on-station trials revealed high significant differences at (p<.001) as well as clone performance on-farm On station MSSource of variation d.f Y/HA WT TNTRep stratum 1 4.34 3.5 122.7Clone 11 48.95*** 39.7*** 13084.3***SITE 2 1138*** 921.8*** 192865.4***Clone.SITE 22 24.*** 19.*** 6780.4***Residual 35 2.84 2.3 827.7Total 71
  18. 18. ResultsClone performance on farm MSSource of variation d.f Y/HA WT TNTRep stratum 1 4.34 3.5 122.7Clone 11 48.95*** 39.7*** 13084.3***SITE 2 1138*** 921.8*** 192865.4***Clone.SITE 22 24.*** 19.*** 6780.4***Residual 35 2.84 2.3 827.7Total 71
  19. 19. Performance of clones in different siteClone KLG MBZD MUB MWONGYERA MWIZI ISULE MEAN 395111.13 22.39 10.22 7.06 38.9 4.8 14.6 16.3 393382.44 20.61 9.57 5.06 50.3 6.4 1.2 13.4 396031.108 15.72 13 3.39 38.3 3.5 5.8 13.8 381471.18 21.17 7.01 1.72 45.9 7.9 10.6 15.7 395029.25 17.83 5.91 3.5 24.9 6.4 4.2 10.2 396038.107 18.56 7.46 0.11 27.6 4.7 8.4 10.1 396034.103 16.39 5.28 3.61 27.1 1.6 6.3 10.4 393077.159 21.39 0.02 0.72 26.5 6.4 9.4 12.4 381381.20 14.23 4.61 2.56 24.9 6.4 8.5 10.2 391046.14 13.72 4.25 2.11 15.6 3.1 5.7 8.4 396016.6 6.82 5.33 2.78 24.3 1.9 3.7 6.5 391692.96 4.01 4.79 0.06 19.3 2.6 0.3 6.2Mean 16.07 6.46 2.72 31.1 4.7 6.6
  20. 20. Results• Of the twelve clones evaluated, six gave above 10t/ha implying that they can be grown in the three agroecologies profitably.• clones 395111.13 and 393382.44 gave fairly good results across the three on-station sites meaning that further selection can lead to varieties adopted to hotter areas.• clones that were least affected vegetatively were the ones that gave high yields (395111.13 and 393382.44) this implies that they tolerent increased temperatures.• The poor performance of 395111 .20 (Victoria) is un explained by these results since it’s widely grown in most potato growing areas in the country.
  21. 21. Results• Kalegyere offers a homely environment for potato growing and this explains the high yield obtained both on station and on farm.• Differential performance of clones at MBAZARDI and Mubuku explains how the different clones respond to drought in the two environments.• With an increase in temperatures, yield and other growth parameters were greatly reduced.
  22. 22. Growth Parameters• Variation was observed for all the tested parameters at the six sites• Clones showed significant differences in number of flowered plants, number of flowers, number of leaves, number of stems, leaflets length, leaflets width and leaf area.• The interaction of clone and sites was significant only for plant height, number of stems and number of leaves.• Number of leaves was least reduced in clone 395111.13, 395029.250, 396038.107 and 396031.108. leaves were mostly reduced in clone 381381.20, 393077.159, 391046.14, and 396038.107.
  23. 23. Way Forward• Final farmer participatory selection of promising clones at flowering and harvesting stages (2 seasons).• Involve farmers and other private institutions in selecting clones with good cooking and processing quality ( chips and crisp)
  24. 24. Acknowledgement• Funding Agency• All partners
  25. 25. THANK YOU
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×