English - McKnight Foundation Collaborative Crop Research Program

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McKnight Foundation Collaborative Crops Research Project No: 06-741 Conclusion The main objective of the field visitation was to evaluate farmer managed experiments in all study villages. Based on the approach and criteria agreed by the farmers, final rank on 5 lines introduced to them is presented in Table 10. The most preferred line is TZA, 263, followed by IT 99 K-7-21-2-2-1 and IT 99K-573-1-1. Position four and five were contested between line IT 89KD-288 and IT 97K 818 which were scored by two villages in the same positions. After revisiting some inherent characteristics of the lines as scored by same farmers in 2008, line IT 89KD-288 was relatively batter on same traits such as early maturity and leave sizes which are lacking in IT 97K-818. Thus IT 89KD-288 was ranked 4 th while IT 97K-818 was ranked 5 th . as indicated in Table 10 Table 10: Farmer preference with respect to 5 introduced cowpea LINES Villages Rank in order of preference 1 st 2 nd 3 rd 4 th 5 th Msungua IT 99K 7-21-2-2-1 IT 99K 573-1-1 TZA 263 1T 97K 818-35 IT 89KD 288 Ikanoda TZA 263 IT 99K 7-21-2-2-1 IT 99K 573-1-1 IT 97K 818-35 IT 89KD 288 Kikombo TZA 263 IT 99K 7-21-2-2-1 IT 99K 573-1-1 IT 97K 818-35 IT 89KD 288 Mkungugu TZA 263 IT 99K 7-21-2-2-1 IT 99K 573-1-1 IT 89KD 288 IT 97K 818-35 Mangalali TZA 263 IT99K-7-21-2-2-1 1T89KD-288 IT99K-573-1 1T 97K 818-35 Rank (1) TZA 263 (2) IT 99K 7-21-2-2-1 (3) IT 99K 573-1-1 (4) IT 89KD 288 (5) IT 97K 818-35 Based on these findings, lines TZA 263, IT 99K-7-21-2-2-1 and IT 99K-573-1-1 are to be increased for distribution to many farmers for more evaluation. For these lines, initial process to establish descriptors for these lines for possible inclusion in the National Performance Trials (NPT) towards variety release should be started. 1.3.4 Targeted crosses Tanzania cowpea crossing program In 2007 report 130 cowpea accessions were screened for Alectra resistance. 10 accessions could not support emergence of Alectra. The identified accessions that could not support emergence of Alectra plants were classified as resistant to Alectra. These were crossed to the desirable parents (the released varieties which are: Fahari, Tumaini, Vuli-1 and Vuli-2) with the aim of transferring the Alectra resistance into these released varieties. Since resistance to Alectra is conditioned by a single gene, a backcross method was used to transfer of resistance. At present the screening (September, 2009) is at backcross three plants. The resistant plants will be identified while they are still flowering, thus the resistant backcross three plants will be backcrossed to the desirable parents to obtain backcross four seed which will be planted and selfed then followed by screening for resistance to Alectra. This process will continue up to backcross six at which it is expected a single chromosome segment carrying the desired gene will have been incorporated into the desired parents. Planting of backcross four seed will be conducted in early November 2009. The selfed backcross four seed will be planted in late February 2010 for screening again for resistance to Alectra and resistant plants backcrossed to the desired parent to produce backcross five seed. Backcross five seed will be planted for selfing in early May 2010 and the selfed backcross five seed will be planted for screening for Alectra resistance in early august 2010. Resistant plants will be backcrossed to desirable parent in October 2010 to produce backcross six seed. Backcross six seed will be selfed ready for evaluation for Alectra resistance and yield on Alectra infested fields in season 20010/011 with the expectation that the project will be extended. 10 2009
McKnight Foundation Collaborative Crops Research Project No: 06-741 Table 14: Backcross three crosses in the screen house at ARI-Ilonga by September 2009 Cross number Pedigree 17 (B301 x Vuli-1) x Vuli-1 30 (IT 97K-499-8 x Vuli-2) x Vuli-2 38 (Tumaini x IT96D-733) x Tumaini 48 (ITK-499-8 x Tumaini) x Tumaini Output 1.4: Collaboration in cowpea research increased in Southern Africa Activity 1.4.1: Across site evaluation (PL to visit programme in Malawi) A trip to Malawi was made from 15 th to 20 th March 2009 to evaluate Cowpea/Alectra project activities The team was composite of Drs Joseph Mligo cowpea breeder, Ambonesigwe Mbwaga Project team leader and Charlie Riches, CoP liaison officer and met by the Malawian project team that was composite of Dr Vernon Kabambe country project leader, Mosses Mamiliro (breeder) ,and James Bokasi (breeder) The evaluation tour for Tanzania was done in three regions (Iringa, Dodoma, and Morogoro) from 27 th to 30 th April, 2009. The tour involved visiting seed multiplication, on-farm, on-station, and crossing programme. The team comprised of the following: Ambonesigwe Mbwaga (Project Leader) ARI, Uyole Mbeya Tanzania Joseph Mligo (Breeder) ARI, Ilonga Kilosa Tanzania Vernon Kabambe (Striga specialist) Bunda College, Lilongwe, Malawi James Bokosi (Breeder) Bunda College, Lilongwe, Malawi Boukar Ousmane (Breeder,) IITA Nigeria Activity 1.4.2: Student projects For Tanzania an MSC student working on a project “Assessment of cowpea marketing efficiency; A case of selected regions of Tanzania” was completed and the student graduated November 2008. In Malawi an MSc student working on a project “Farmer Participatory Selection of Alectra Resistant Cowpea Varieties in Selected Districts of Malawi”. The thesis has been submitted to examiners for review. In addition in Malawi an BSc student is undertaking a study on “Cowpea variety x time of planting x density” Activity 1.4.3: Paricipation in CCRP "community of practie Three researchers, one extensionist and one farmer from the project attended CoP2 in Maputo Mozambique in October 2008. In CoP3 in Bagamoyo Tanzania 4 researchers and 4farmers from project sites attended Activity 1.4.4: End of project stakeholder’s workshop (location to be determined later) Output 1.5: Project monitored and evaluated Activity 1.5.1. Establish project level M & E criteria (done during partners meeting in Mbeya at the inception of the project) Activity1.5.2. Review progress against M & E criteria each year Introduction: A trip to Malawi was made from 15 th to 20 th March 2009 to evaluate Cowpea/Alectra project activities. The team was composed of Drs Joseph Mligo cowpea breeder, Ambonesigwe Mbwaga Project team leader and Charlie Riches( CoP- liaison officer) and met by the Malawian project team that was composed of Dr Vernon Kabambe country project leader, Mosses Mamiliro( breeder), and James Bokosi (breeder). The objective of the visit were To evaluate on going on-farm cowpea activities, on station project activities and crossing work in screen house 11 2009
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English - McKnight Foundation Collaborative Crop Research Program

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