Identification of the heterotic pattern in Yugoslav maize germplasm

analisi statistica analyse statistique banche di geni banco de genes eterosi fitomejoramiento gene banks germoplasma germplasm heterosis hybridation hybridization ibridazione impollinazione libera iugoslavia miglioramento genetico vegetale open pollination plant breeding pollinisation libre statistical analysis variedades varieties vigueur hybride yougoslavie yugoslavia zea mays