TY  - JOUR
N2  - 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.
N1  - 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.
AV  - public
KW  - Base broadening
KW  -  Germplasm
KW  -  Sorghum
KW  -  Phosphorus adaptation
KW  -  Selection strategy
A1  - Diallo, C
A1  - Rattunde, H F W
A1  - Gracen, V
A1  - Touré, A
A1  - Nebié, B
A1  - Leiser, W
A1  - Dzidzienyo, D K
A1  - Sissoko, I
A1  - Danquah, E Y
A1  - Diallo, A G
A1  - Sidibé, B
A1  - Sidibé, M
A1  - Weltzien, E
TI  - Genetic Diversification and Selection Strategies for Improving Sorghum Grain Yield Under Phosphorous-Deficient Conditions in West Africa
UR  - https://doi.org/10.3390/agronomy9110742
JF  - Agronomy (TSI)
Y1  - 2019/11//
ID  - icrisat11394
SN  - 2073-4395
VL  - 9
PB  - MDPI
IS  - 11
ER  -