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Variability patterns in Ugandan pigeonpea landraces.

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Relation http://oar.icrisat.org/2024/
 
Title Variability patterns in Ugandan pigeonpea landraces.
 
Creator Manyasa, E O
Silim, S N
Christiansen, J L
 
Subject Pigeonpea
 
Description In-situ evaluation of pigeonpea cropping system and management in Uganda and agro-morphological characterization of 29 pigeonpea landraces were studied in 2001 and 2004/05, respectively. Results showed that pigeonpea in Uganda is predominantly intercropped with finger millet and to some extent with maize and sorghum. Farmers largely used saved grain as seed and appreciated the damage by insect pests, but only farmers in Apach and Lira districts practiced any form of pest control. Observations across the collection districts indicated low levels of Fusarium wilt disease. Agronomic evaluation of the 29 accessions revealed differential adaptation at the two test locations in Kenya with accessions expressing a delayed phenology at the cooler Kabete relative to the warmer Kampi ya Mawe. Lower 100-seed weight was reported at Kabete relative to Kampi ya Mawe possibly due to excessive vegetative growth at Kabete. Cluster analysis delineated the germplasm into four clusters all separated from the adapted medium- and long-duration checks. Although overall two distinct diversity groups were observed separating the short, medium-maturing types from the tall late- and very late-maturing types, the separation was relatively marginal suggesting a closer genetic relation between the Ugandan pigeonpea germplasm. Relatively low diversity in qualitative traits was observed in the ccessions. The predominance of accessions with pubescent pods, a trait associated with resistance to pod damaging insects may provide an opportunity to identify materials for insect pest resistance for use in breeding.
 
Publisher International Crops Research Institute for the Semi-Arid Tropics
 
Date 2009
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/2024/1/variability__7_1-9_2009.pdf
Manyasa, E O and Silim, S N and Christiansen, J L (2009) Variability patterns in Ugandan pigeonpea landraces. Journal of SAT Agricultural Research, 7. pp. 1-9. ISSN 0973-3094