Final version of Tropical Legumes II Project Report for Phase 1 - icrisat
Final version of Tropical Legumes II Project Report for Phase 1 - icrisat
Final version of Tropical Legumes II Project Report for Phase 1 - icrisat
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In 2009/10 summer season, the selected 200 lines were sent to farmers <strong>for</strong> participatory variety selection,<br />
to expose genotypes to natural drought conditions and farmer environment, improve efficiency <strong>of</strong><br />
researcher’s selections, meet standards <strong>of</strong> variety release and increase chances <strong>of</strong> variety adoption<br />
once released. Most parts <strong>of</strong> the country received below average rains and persistent dry spells were<br />
recorded, giving rise to two types <strong>of</strong> drought, depending on region/district. One scenario was drought<br />
which affected beans at flowering stage (mid season drought) and the other case where late planting<br />
was done that favored terminal drought. There was also an extreme scenario where the rains did not<br />
even support seed germination in known drought-prone areas like Gutu and Mushagashe in Masvingo<br />
province.<br />
Of the 200 lines, farmers from different areas managed to select 30 lines. Farmers’ selection criteria<br />
were mainly based on varieties resistant to drought since 2009/10 year was a drought year. We managed<br />
to receive a few grams/line from farmers since the majority <strong>of</strong> farmers retained some <strong>of</strong> the seed. The<br />
varieties which were selected by farmers under farmer fields have been reconstituted into one nursery<br />
and are currently being bulked up at Harare Research Station to enable on-station trials under drought<br />
conditions in the Lowveld during winter 2011. Physiological parameters <strong>for</strong> drought tolerance will be<br />
precisely measured. Multilocation variety evaluation will then follow, with possible release <strong>of</strong> at least<br />
one drought tolerant variety in 2012/13 season.<br />
Number <strong>of</strong> segregating materials generated<br />
Segregating populations were developed <strong>for</strong> selection in CIAT-Colombia, in CIAT research sites in<br />
Africa, and in NARS programs. Based on evaluations made in Colombia, elite parental lines were<br />
selected <strong>for</strong> another cycle <strong>of</strong> crossing with emphasis on beans <strong>of</strong> the Andean gene pool. Approximately<br />
60 populations were evaluated per year in CIAT-Colombia. Other populations were sent to partners in<br />
four <strong>of</strong> the five participating countries, while in Zimbabwe, the program focused on giving follow up to<br />
existing populations (Table 6-18). Additional crosses were made in the Ethiopian program (Table 6-19),<br />
and parental materials were delivered to KARI-Kenya to initiate a crossing program there.<br />
Table 6-18: Numbers <strong>of</strong> segregating populations delivered to national program breeders <strong>for</strong> local selection.<br />
Country Number <strong>of</strong> F2 Populations Other Populations<br />
Ethiopia 52 -<br />
Kenya 15 48 F4<br />
Malawi 21 59 F4<br />
Tanzania 5 -<br />
Zimbabwe - F5 from previous project<br />
Table 6-19: Simple crosses made at Melkassa Research Center, EIAR, Ethiopia, <strong>for</strong> subsequent use in multiple crosses<br />
No. Cross No. Cross No. Cross<br />
1 Capsula x Awash-Melka 11 NASIR x SER-128 21 Chore x SAB-713<br />
2 Capsula x SAB-712 12 NASIR x SER-78 22 Chore x MEX-142<br />
3 Capsula x SAB-713 13 Awash-Melka x MEX-142 23 Dimtu x SER-176<br />
4 Capsula x VAX-3 14 Awash-Melka x VAX-3 24 Dimtu x SER-128<br />
5 Capsula x COS-16 15 Awash-1 x MEX-142 25 Dimtu x SER-78<br />
6 NASIR x SER-16 16 Awash-1 x VAX-3 26 Red wolayita x SER-176<br />
7 NASIR x SEA-5 17 Cherchere x MEX-142 27 Red wolayita x SER-128<br />
8 NASIR x BAT-477 18 Cherchere x VAX-3 28 Red wolayita x SER-78<br />
9 NASIR x RAZ-44 19 Cherchere x BAT-477 29 Awash-1 x G 21212<br />
10 NASIR x SER-176 20 Chore x SAB-712<br />
Progress <strong>of</strong> <strong>Phase</strong> 1<br />
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