Fig. 1
From: Development of improved and comprehensive growth and yield models for genetically improved stands
Conceptual illustration of growth differences of genetically improved stands. a Different patterns where gain persists across time and b where gain diminishes with time. Us represents the growth process of unimproved stand; Gn means that the initial genetic gain did not disappear over time; Gnc represents the growth process of genetically improved stand which the genetic gain is constant throughout the growth period; Gn1, Gn2, and Gn3 represent the growth process of genetically improved stand whose genetic gain is varied throughout the growth period; 1, 2, and 3 represent different specific forms; G0 means that the initial genetic gain disappeared over time (equal to zero at maturity); G01, G02, and G03 represent the growth process of genetically improved stand which the initial genetic gain disappeared over time