Almond physical traits affected by rootstocks in 'Marinada' cultivar
Several rootstocks are available for almond, including different hybrids from several Prunus species. Results from a comparative trial planted in Borges Blanques, Lleida (northeastern Spain) grafting Marinada onto 10 different rootstocks are presented. Rootstocks are INRA®-GF-677, Garnem®, Cadaman, Ishtara®, IRTA-1, IRTA-2, Puebla del Soto, ROOTPAC®-70-R, ROOTPAC®-40, and ROOTPAC®-20. Physical traits of the kernel (before and after blanching) and mechanical properties of both kernel and shell were studied. Statistical analysis showed significant differences between rootstocks for almost all the variables. The less vigorous rootstocks (ROOTPACK®-20, Ishtara® and ROOTPAC®-40) produced kernels of lower quality (small weight and size, darker blanched kernel) and with higher risk of kernel breakage, but also produce a stronger shell. The more vigorous rootstock (Garnem®, INRA®-GF-677 and Cadaman) showed the opposite effects. Shell strength is significantly higher in those rootstocks with lower production (ROOTPAC®-40, IRTA-2 and Puebla del Soto), while shell flexibility was higher in rootstocks with higher crop load (INRA®-GF-677, Garnem® and Cadaman) that also result in higher risk of external shell breakage (double-shell characteristic).
Romero, A., Batlle, I. and Miarnau, X. (2018). Almond physical traits affected by rootstocks in 'Marinada' cultivar. Acta Hortic. 1219, 31-36
kernel shape, skin color, shell strength, kernel strength