Agronomic properties and fruit quality of seven clones of M9 underneath Golden Delicious | Comportement agronomique et qualite du fruit de sept clones de M9 avec Golden Delicious
2007
Sassella, A. | Monney, Ph., Station de recherche Agroscope Changins-Waedenswil ACW, Nyon (Switzerland)
The rootstocks M20, M27, P22, P16, Supporter 1, Supporter 2 and two clones of M9, Burgmer 984 and FL56, were between 1994 and 2002 compared to the control EMLA. The evaluation was based on the clone B type GD 85 of the variety Golden Delicious. M20, M27 and P22 reduced vigour by 65% and Supporter 1 and Supporter 2 by 30-40%. Burgmer 984 und FL 56 with 6 and 20% reduction, respectively, did not differ significantly from the control. P16 guaranteed in relation to vigour the best productivity and due to increased fruit calibre the highest proportion of commercial quality. In contrast, this rootstock was placed last concerning sugar content and firmness. Best values were obtained by M27, P22 und M20. The three clones of M9 reached below average sugar values and a satisfactory firmness. Except with P16, a weak vigour favoured sugar content, but did not influence calibre and firmness, which are mostly determined by average fruit weight. This explains M20 and P16 bad results.
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