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Genetic Diversification and Selection Strategies for Improving Sorghum Grain Yield Under Phosphorous-Deficient Conditions in West Africa

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Relation http://oar.icrisat.org/11394/
https://doi.org/10.3390/agronomy9110742
doi:10.3390/agronomy9110742
 
Title Genetic Diversification and Selection Strategies for Improving Sorghum Grain Yield Under Phosphorous-Deficient Conditions in West Africa
 
Creator Diallo, C
Rattunde, H F W
Gracen, V
Touré, A
Nebié, B
Leiser, W
Dzidzienyo, D K
Sissoko, I
Danquah, E Y
Diallo, A G
Sidibé, B
Sidibé, M
Weltzien, E
 
Subject Cereals
Sorghum
Genetics and Genomics
Food Security
Germplasm
 
Description Sorghum, a major crop for income generation and food security in West and Central Africa, is predominantly grown in low-input farming systems with serious soil phosphorus (P) deficiencies. This study (a) estimates genetic parameters needed to design selection protocols that optimize genetic gains for yield under low-phosphorus conditions and (b) examines the utility of introgressed backcross nested association mapping (BCNAM) populations for diversifying Malian breeding materials. A total of 1083 BC1F5 progenies derived from an elite hybrid restorer “Lata-3” and 13 diverse donor accessions were evaluated for yield and agronomic traits under contrasting soil P conditions in Mali in 2013. A subset of 298 progenies were further tested under low-P (LP) and high-P (HP) conditions in 2014 and 2015. Significant genetic variation for grain yield was observed under LP and HP conditions. Selection for grain yield under LP conditions was feasible and more efficient than the indirect selection under HP in all three years of testing. Several of the BCNAM populations exhibited yields under LP conditions that were superior to the elite restorer line used as a recurrent parent. The BCNAM approach appears promising for diversifying the male parent pool with introgression of diverse materials using both adapted Malian breed and unadapted landrace material from distant geographic origins as donors.
 
Publisher MDPI
 
Date 2019-11
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11394/1/agronomy-09-00742-v2.pdf
Diallo, C and Rattunde, H F W and Gracen, V and Touré, A and Nebié, B and Leiser, W and Dzidzienyo, D K and Sissoko, I and Danquah, E Y and Diallo, A G and Sidibé, B and Sidibé, M and Weltzien, E (2019) Genetic Diversification and Selection Strategies for Improving Sorghum Grain Yield Under Phosphorous-Deficient Conditions in West Africa. Agronomy (TSI), 9 (11). p. 742. ISSN 2073-4395