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

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

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Abstract

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.

Item Type:	Article
Divisions:	Research Program : West & Central Africa
CRP:	CGIAR Research Program on Dryland Cereals
Uncontrolled Keywords:	Base broadening, Germplasm, Sorghum, Phosphorus adaptation, Selection strategy
Subjects:	Others > Cereals Mandate crops > Sorghum Others > Genetics and Genomics Others > Food Security Others > Germplasm
Depositing User:	Mr Arun S
Date Deposited:	16 Mar 2020 04:50
Last Modified:	16 Mar 2020 04:58
URI:	http://oar.icrisat.org/id/eprint/11394
Official URL:	https://doi.org/10.3390/agronomy9110742
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	The authors thank the technical sta� of the sorghum-breeding program in ICRISAT and IER-Mali for their contribution in phenotyping. We thanks the team of West Africa Center for Crop Improvement (WACCI) and AGRA project funded by the foundation bill and Melina gate for their participation. This work was undertaken as a part of the CGIAR Research Program on Dryland Cereals.
Links:	Google Scholar

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