Microclonal success of avocado using different scions and clonal rootstock varieties
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Abstract
This study explored the microclonal compatibility of various avocado clonal rootstocks and scion varieties, assessing their influence on growth parameters such as leaf production, chlorophyll content, stem length, and stem diameter. The study employed a randomized complete block design (RCBD) with split plots, focusing on different clonal rootstock and scion combinations. The results demonstrated significant interactions between the clonal stock and scion varieties, influencing key growth metrics. 'Hass' scions microcloned onto 'Purple' and 'Evergreen' clonal rootstocks produced 5.60 leaves each, showing superior growth. In terms of leaf area, 'Hass' scions microcloned onto 'Purple' clonal rootstocks had the largest leaf area of 36.11 cm², significantly higher than other combinations. The chlorophyll content (Soil Plant Analysis Development [SPAD] values) was highest when 'Hass' scions were microcloned onto 'Purple' clonal rootstocks, yielding a 35.82 SPAD values. The highest stem length (6.02 cm) was observed in ‘Hass’ scion microcloned on ‘Evergreen’ clonal rootstock, while the biggest stem diameter (0.300 cm) was observed in ‘Evergreen’ scion microcloned onto ‘Purple’ clonal rootstock. These findings suggest that the pairing of 'Hass' microclone on 'Purple' clonal rootstock, can optimize early plant growth, leaf production, and plant health, and significantly impacts plant vigor. Further research may be conducted to monitor long-term plant health and refine microcloning techniques for improved avocado cultivation.
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