cwad: Connectivity-Weighted Allocation and Comparison of Field-Plot
Designs
A reproducible mixed-model toolkit for plant-breeding trial design.
It evaluates any replication allocation under a known genetic relationship
(kinship) matrix using one common linear-mixed-model engine on genotype
means. Crucially, allocation and analysis model are crossed rather than
confounded: every allocation can be scored both with and without kinship,
so the precision gain attributable to a design can be separated from the
gain attributable to the kinship-based analysis adopted alongside it. It
computes A-optimal, connectivity-aware allocations via rank-1
Sherman-Morrison updates, and provides Monte-Carlo stress tests for outlier
shrinkage and for an incorrectly specified kinship matrix, each with a
matched control arm.
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