![]() ![]() We provided maps with overviews of quantitative trait loci that were responsible for the heterosis of various agronomic traits. Here, we have achieved a significant breakthrough by using genome selection and significantly advanced models to predict the heterosis by pairing genome-wide nucleotides of parents. However, the procedure of using classical breeding methods remains slow and laborious, illustrating the need for predictive and innovative methods. ![]() The utilization of hybridization, leading to hybrid vigor, or heterosis, is a successful strategy in increasing yield and vigor for many field crops including rapeseed ( Brassica napus). It represents an excellent model of a successful recent polyploid that rapidly became an important crop worldwide. Oilseed rape ( Brassica napus) is of significant economic interest worldwide, providing high-quality oil with excellent health-promoting properties. ![]() The achievements here provide a case of heterosis prediction in polyploid genomes with relatively large genome sizes. Using models that we elaborated, combining abilities between an Ogu-CMS-pool member and a potential restorer can be simulated in silico, sidestepping laborious work, such as testing crosses in fields. Identifications and annotations of genes underlying high impacting h-QTLs were provided. We drew maps with overviews of quantitative-trait loci that were responsible for the heterosis ( h-QTLs) of various agronomic traits. It was found that the C subgenome of rapeseed had a greater impact on heterosis than the A subgenome. Overall, PGSI negatively affected grain yield and several other traits but positively influenced the thousand-seed weight of the hybrids. Here, we applied the genomic-selection (GS) strategy and developed models that significantly increase the predictability of heterosis by introducing the concept of a regional parental genetic-similarity index (PGSI) and reducing dimension in the calculation matrix in a machine-learning approach. However, it consumes tremendous manpower to test the combining ability of the parents in fields. The utilization of heterosis is a successful strategy in increasing yield for many crops. ![]()
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