Comparison of phenotypic selection of inbred lines, genomic selection of inbred lines, and evolutionary populations for field pea breeding in three Mediterranean regions
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View abstract on PubMed
Summary
This summary is machine-generated.This study compared pea breeding strategies, finding evolutionary populations (EPs) offer yield stability and adaptability, while genomic selection (GS) and phenotypic selection (PS) lines show competitive yields. Bulk-derived lines outperformed single-seed descent (SSD) lines under specific stress conditions.
Area Of Science
- Plant breeding and genetics
- Agricultural science
- Crop improvement
Background
- Pea breeding programs utilize various selection methods including phenotypic selection (PS), genomic selection (GS), and evolutionary populations (EPs).
- Optimizing regional grain yield selection requires comparing these diverse breeding approaches across different environments.
Purpose Of The Study
- To compare the effectiveness of PS, GS, and EPs for region-specific pea grain yield selection in Central Italy, coastal Algeria, and inland Morocco.
- To evaluate bulk-derived versus single-seed descent (SSD)-derived lines under specific stress conditions.
Main Methods
- Development of EPs through mass and natural selection under region-specific stresses (drought, autumn sowing).
- Region-specific line selections using PS and GS models on three connected crosses.
- Comparative field evaluations of all selected lines and EPs in target regions under various conditions, including drought and intercropping.
Main Results
- EPs matched GS/PS lines in mean yield but demonstrated superior yield stability and adaptability to intercropping and unfavorable years.
- Top-yielding lines within GS/PS categories out-yielded EPs in their target regions.
- GS showed a potential superiority over PS in yield performance for top-yielding lines in Algeria and Morocco.
- Bulk-derived lines significantly out-yielded SSD-derived lines under matching stress conditions.
Conclusions
- EPs offer a valuable strategy for enhancing yield stability and adaptability in pea breeding programs.
- GS and PS are effective for line selection, with GS showing promise for superior top-line performance.
- The choice of breeding strategy should align with specific program objectives, considering trade-offs between mean yield, stability, and adaptability.
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