In Wikipedia: Pigeonpea

Two fusarium-resistant improved pigeonpea varieties are ICEAP 00040 and ICEAP 00053. ICEAP 00053 resists wilt, is high yielding, large-seeded and widely grown in Tanzania, Malawi, Kenya and Mozambique, increasing farmer's income up to 80%.
Contact: Said Silim; email: gro.raigc|milis.s#gro.raigc|milis.s.
Source: Harvesting the Seeds of Success of ICRISAT's Research.

There is a detailed study on its use in northern Tanzania: Poverty Reduction Effects of Agricultural Technology: A Micro-evidence from Tanzania (2011) by Solomon Asfaw, Menale Kassie, Franklin Simtowe and Leslie Lipper.

This crop is listed in the Annex I List of Crops Covered under the Multilateral System of the International Treaty on Plant Genetic Resources for Food and Agriculture

Check out GENESYS for information on seed collections for this crop, with for each accession in GENESYS information such as: