TY  - RE
AU  - Johnson,E.C.
AU  - Fischer,K.L.
TI  - Combining ability (Heterotic patterns)
PY  - 1980///
CY  - Mexico, DF (Mexico)
PB  - CIMMYT, 
KW  - Combining ability
KW  - Crossbreeding
KW  - Environmental factors
KW  - Gene pools
KW  - Germplasm
KW  - AGROVOC
KW  - Hybrid vigour
KW  - Seed testing
KW  - Trials
KW  - Zea mays
ER  -