Maximizing Efficiency of Recurrent Phenotypic Selection for Neutral Detergent Fiber Concentration in Smooth Bromegrass

Abstract

Resources are always limited in plant breeding programs, limiting the number of plots or plants that can be utilized in recurrent selection. Replication of selection units in space or time provides a mechanism to improve the precision of measurements. For smooth bromegrass (Bromus inermis L.), neutral detergent fiber (NDF) is the most effec-

Mega‐Environmental Design: Using Genotype × Environment Interaction to Optimize Resources for Cultivar Testing

“…Most of the historical MET for evaluation of elite genotypes have used experimental designs with replications that were balanced across locations and generally unbalanced across years (Piepho and Mö;hering, 2007). More recently, partially replicated experiments that are balanced across locations were proposed as an alternative to increase the number of genotypes tested (Talbot, 1984; Stendal and Casler, 2006; Möehring et al, 2014). Furthermore, Lorenz (2013) recommends increasing population sizes rather than replication when simulating resource allocation strategies for genomic selection.…”

Allocation of Experimental Resources Used in Potato Breeding to Minimize the Variance of Genotype Mean Chip Color and Tuber Composition

“…In the case of smooth bromegrass (Bromus inermis Leyss. ), for example, genetic gain for neutral detergent fi ber concentration was maximized by basing selection on multiple harvests within a year rather than replication of genotypes or locations (Stendal and Casler, 2006). Extensive variation in chip color and tuber sugar composition is common in early generations of potato breeding programs, and therefore, the variance estimates used here for modeling resource allocation are reasonable.…”