= Plant breeding
<Plant breeding> changes the inherited characteristics of cultivated <plants> by choosing parents, generating variation and selecting descendants. Crosses followed by repeated selection can combine <disease resistance> with useful yield or quality traits. <Genetic recombination> determines which combinations can be recovered, while <linkage drag> can preserve undesirable neighbouring material.
Evaluation across environments matters because a selected <genotype> need not retain the same advantage under drought, different soils or a different <pathogen>. Experiments manipulating <chromosomal crossovers> investigate a mechanism that limits how readily useful parental variants can be separated and combined.<Unleashing meiotic crossovers in crops by Delphine Mieulet and others>[2018, primary research on increased crossover formation]{ref}
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