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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Table 11-15: Release notes <strong>of</strong> the two soybean varieties released in Kenya - 2010<br />
Tested in<br />
NPT as<br />
SB19<br />
SB8<br />
Name<br />
Proposed<br />
<strong>of</strong>ficial name<br />
<strong>for</strong> release<br />
Year <strong>of</strong><br />
release<br />
Owner<br />
Maintainer<br />
and seed<br />
source<br />
Optimal<br />
production<br />
altitude range<br />
(masl)<br />
Duration<br />
to maturity<br />
(months)<br />
Grain yield<br />
(MT per ha)<br />
TGx DPSB 19 2010 <strong>II</strong>TA KARI/ Leldet 900 -2400 3-4 0.6 - 1.7<br />
1740-2F<br />
seed company<br />
Special attributes:<br />
• Dual purpose (high biomass, high yield and free nodulating)<br />
• High yield , 6.53% over the mean <strong>of</strong> checks; high biomass (1.5-3.0 MT per ha)<br />
• Rust resistant<br />
• Nodulates with indigenous population <strong>of</strong> rhizobia in Kenya soils to fix atmospheric nitrogen<br />
• Good <strong>for</strong> making soyabean milk<br />
• High pod clearance (13.2 cm), hence easy to harvest using combine harvester, if necessary<br />
• High pod load (28 pods per plant)<br />
• Attractive creamy seed coat<br />
• Good <strong>for</strong> intercropping<br />
• Medium seed size<br />
TGx DPSB 8 2010 <strong>II</strong>TA KARI / 900 -2400 4-5 0.5 -2.6<br />
1895-<br />
Leldet seed<br />
33F<br />
company<br />
Special attributes:<br />
• Dual purpose ( high biomass, high yield and free nodulating)<br />
• High yield , 7.71 % over the mean <strong>of</strong> checks; - High biomass (2.5-3.0 t/ha)<br />
• Nodulates with indigenous population <strong>of</strong> rhizobia in Kenya soils to fix atmospheric nitrogen<br />
• Good <strong>for</strong> making soyabean milk<br />
• High pod clearance (9.1 cm) hence easy to harvest using combine harvester, if necessary.<br />
• High pod load 33 pods per plant<br />
• Attractive creamy seed coat<br />
• Good <strong>for</strong> monocropping<br />
• Large seed size<br />
In Mozambique, significant differences were obtained among the new lines in the 2009/10 multilocation<br />
trials at Ruace, Nampula and Domue (Table 11-19). Average location yield at Ruace was 4031 kg per<br />
ha whilst it was 1407 kg per ha and 1692 kg per ha at Nampula and Domue, respectively. At Ruace,<br />
the top grain yield <strong>of</strong> 4960 kg per ha was obtained from TGx 1485-1D, followed by TGx 1972-1F with<br />
4930 kg per ha. The check variety (Storm) gave 4159 kg per ha. In general, Ruace is a high potential<br />
area <strong>for</strong> soybean cultivation as yields <strong>of</strong> all the test genotypes ranged from 3154 kg per ha to 4960 kg<br />
per ha. At Nampula the highest yield <strong>of</strong> 2037 kg per ha was obtained from TGx 1937-1F, followed by<br />
TGx 1987-38F with 1994 kg per ha whereas the check variety Storm gave a grain yield <strong>of</strong> 971 kg per<br />
ha, which was the second highest yield from the bottom. At Domue (Tete province), TGx 1987-38F<br />
gave the highest grain yield <strong>of</strong> 2475 kg per ha, followed by TGx 1987-62F (2465 kg per ha). At this<br />
location the yield <strong>of</strong> Storm was the lowest (668 kg per ha). Across locations, the best per<strong>for</strong>mers were<br />
TGx 1987-38F, TGx 1987-20F and TGx 1987-62Fwhereas Storm was the least per<strong>for</strong>mer as compared<br />
to the test genotypes.<br />
In western Kenya, the new breeding lines showed excellent per<strong>for</strong>mance in 2010 (Table 11-20).<br />
Significant differences among lines were obtained from Sidada and Kokare sites. Location mean yields<br />
were higher at Sidada (2785 kg per ha) as compared to Kokare (1003 kg per ha). All the new breeding<br />
lines surpassed the local check (Nyala) at Sidada. The top yielders were TGx 1987-18F (3287 kg per<br />
ha), TGx 1987-20F (3200 kg per ha) and TGx 1987-65F (3167 kg per ha). At Kokare, TGx 1987-18F,<br />
TGx 1987-32F and TGx 1987-20F were top yielders with a respective yields <strong>of</strong> 1963 kg per ha, 1856 kg<br />
per ha, and 1845 kg per ha. These new breeding lines also showed resistance to rust at these locations.<br />
Progress <strong>of</strong> <strong>Phase</strong> 1<br />
233