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Article

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

1
Department of Agronomic Sciences, Institut Polytechnique Rural de Formation et Recherche Appliquée de Katibougou, (IPR/IFRA), BP 06 Koulikoro, Mali
2
Agronomy Department, University of Wisconsin-Madison, Madison, WI 53706, USA
3
School of Integrative Plant Sciences, Section of Plant Breeding and Genetics Cornell University, Ithaca, NY 14853, USA
4
Sorghum Program, International Crops Research Institute for Semi-Arid Tropics, (ICRISAT), 65 Bamako, Mali
5
State Plant Breeding Institute, Univ. of Hohenheim, 70599 Stuttgart, Germany
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West Africa Center for Crop Improvement (WACCI), University of Ghana (UG), P.O. Box LG 25 Accra, Ghana
7
Institut d’Economie Rurale, BP 262 Bamako, Mali
*
Author to whom correspondence should be addressed.
Agronomy 2019, 9(11), 742; https://doi.org/10.3390/agronomy9110742
Received: 2 October 2019 / Revised: 31 October 2019 / Accepted: 4 November 2019 / Published: 11 November 2019
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. View Full-Text
Keywords: base broadening; germplasm; sorghum; phosphorus adaptation; selection strategy base broadening; germplasm; sorghum; phosphorus adaptation; selection strategy
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MDPI and ACS Style

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. Genetic Diversification and Selection Strategies for Improving Sorghum Grain Yield Under Phosphorous-Deficient Conditions in West Africa. Agronomy 2019, 9, 742. https://doi.org/10.3390/agronomy9110742

AMA Style

Diallo C, Rattunde HFW, Gracen V, Touré A, Nebié B, Leiser W, Dzidzienyo DK, Sissoko I, Danquah EY, Diallo AG, Sidibé B, Sidibé M, Weltzien E. Genetic Diversification and Selection Strategies for Improving Sorghum Grain Yield Under Phosphorous-Deficient Conditions in West Africa. Agronomy. 2019; 9(11):742. https://doi.org/10.3390/agronomy9110742

Chicago/Turabian Style

Diallo, Chiaka, H. F.W. Rattunde, Vernon Gracen, Aboubacar Touré, Baloua Nebié, Willmar Leiser, Daniel K. Dzidzienyo, Ibrahima Sissoko, Eric Y. Danquah, Abdoulaye G. Diallo, Bakary Sidibé, Mamourou Sidibé, and Eva Weltzien. 2019. "Genetic Diversification and Selection Strategies for Improving Sorghum Grain Yield Under Phosphorous-Deficient Conditions in West Africa" Agronomy 9, no. 11: 742. https://doi.org/10.3390/agronomy9110742

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