Cross Potential Selection: A Proposal for Optimizing Crossing Combinations in Recurrent Selection Using the Usefulness Criterion of Future Inbred Lines.
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引用次数: 0
Abstract
In plant breeding programs, rapid production of novel varieties is highly desirable. Genomic selection allows the selection of superior individuals based on genomic estimated breeding values. However, it is worth noting that superior individuals may not always be superior parents. The choice of the crossing pair significantly influences the genotypic value of the resulting progeny. This study has introduced a new crossing strategy, termed cross potential selection (CPS), designed to expedite the production of novel varieties of inbred crops. CPS integrates fast recurrent selection and usefulness criterion to generate novel varieties. It considers the segregation of each crossing pair and computes the expected genotypic values of the top-performing individuals, assuming that the progeny distribution of genotypic values follows a normal distribution. It does not consider genetic diversity and focuses only on producing a novel variety as soon as possible. We simulated a 30-year breeding program in two scenarios, low heritability (h2 = 0.3) and high heritability (h2 = 0.6), to compare CPS with two other selection strategies. CPS consistently demonstrated the highest genetic gains among the three strategies in early cycles. In the 3rd year of the breeding program with a high heritability (h2 = 0.6), CPS exhibited the highest genetic gains, 138 times that of 300 independent breeding simulations. Regarding long-term improvement, the other selection strategies outperformed CPS. Nevertheless, compared with the other two strategies, CPS achieved significant short-term genetic improvements. CPS is a suitable breeding strategy for the rapid production of varieties within limited time and cost.
期刊介绍:
G3: Genes, Genomes, Genetics provides a forum for the publication of high‐quality foundational research, particularly research that generates useful genetic and genomic information such as genome maps, single gene studies, genome‐wide association and QTL studies, as well as genome reports, mutant screens, and advances in methods and technology. The Editorial Board of G3 believes that rapid dissemination of these data is the necessary foundation for analysis that leads to mechanistic insights.
G3, published by the Genetics Society of America, meets the critical and growing need of the genetics community for rapid review and publication of important results in all areas of genetics. G3 offers the opportunity to publish the puzzling finding or to present unpublished results that may not have been submitted for review and publication due to a perceived lack of a potential high-impact finding. G3 has earned the DOAJ Seal, which is a mark of certification for open access journals, awarded by DOAJ to journals that achieve a high level of openness, adhere to Best Practice and high publishing standards.