TY  - JA
AU  - Nti,F.K.
AU  - Barkley,A.
TI  - Wheat variety yield data: do commercial and public performance tests provide the same information?
SN  - 0169-5150
PY  - 2017///
CY  - Amsterdam (Netherlands)
PB  - IAAE, Wiley
KW  - AGROVOC
KW  - Selection
KW  - Wheat
KW  - Plant breeding
KW  - Experimentation
KW  - Performance testing
N1  - Peer review
N2  - Wheat yields from reported performance test results are of economic importance to wheat producers, since their profits depend on selecting the optimal variety for their location. However, our data shows differences in absolute and relative wheat yields between commercial and public wheat breeding program's performance test data in Kansas. Newly available data are used to test if the difference in yields arose from potential selectivity bias, and to determine the contribution of private and public wheat breeding programs to varietal yield improvement during 2007–2012. Both Heckman selection models and multiple regression showed no statistical evidence of the potential presence of selectivity bias rather, managerial practices, agronomic conditions, field location, and inherent genetic traits of the seed variety were identify as the source of yield differences
DO  - https://doi.org/10.1111/agec.12333
T2  - Agricultural Economics
ER  -