Table 1 Type of genetic gains that can be estimated by a breeding program, sources of datasets and the characteristics of each type of population used in terms of connectivity and TPE coverage. Modified from Covarrubias-Pazaran (2020)
From: Realized Genetic Gain in Rice: Achievements from Breeding Programs
Method | Data required | Type of material | Factors to be considered | Connectivitya/TPEb coverage |
|---|---|---|---|---|
Expected | Any trial information | Any generation material | The heritability used will have an important effect on the under- or overestimation of the metric | Low after first selection cycle |
Realized | Era trial information | Early material | 1) TPE coverage is low (usually a few locations & a couple of years). 2) Connectivity between entries is maximal (cohorts evaluated at the same time). 3) Sample can overestimate the metric | High/Low |
Advanced material | ||||
Released varieties | ||||
On-farm | ||||
Historical trial information | Early material | 1) TPE coverage can be low (early), intermediate (advanced) or high (varieties). 2) Connectivity between entries depends on controls and the use of methods such as EBV. 3) Sample can overestimate the metric | Variable/Low | |
Advanced material | Variable/intermediate | |||
Released varieties | Variable/High | |||
On-farm | Variable/High |