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Genetic Diversification and Selection Strategies for Improving Sorghum Grain Yield Under Phosphorous-Deficient Conditions in West Africa
- Source :
- Agronomy, Volume 9, Issue 11, Agronomy, Vol 9, Iss 11, p 742 (2019)
- Publication Year :
- 2019
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2019.
-
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 &ldquo<br />Lata-3&rdquo<br />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.
- Subjects :
- 0106 biological sciences
Germplasm
base broadening
phosphorus adaptation
lcsh:S
Introgression
selection strategy
04 agricultural and veterinary sciences
Biology
germplasm
Sorghum
biology.organism_classification
01 natural sciences
lcsh:Agriculture
Crop
Agronomy
Genetic variation
Backcrossing
040103 agronomy & agriculture
0401 agriculture, forestry, and fisheries
Nested association mapping
sorghum
Agronomy and Crop Science
Selection (genetic algorithm)
010606 plant biology & botany
Subjects
Details
- Language :
- English
- ISSN :
- 20734395
- Database :
- OpenAIRE
- Journal :
- Agronomy
- Accession number :
- edsair.doi.dedup.....6eacd019097a825f7c9964f059c31caa
- Full Text :
- https://doi.org/10.3390/agronomy9110742