EVALUATION OF ADVANCED USDA CITRUS SCION GERMPLASM
Citrus and Other Subtropical Products Research
2013 Annual Report
1a.Objectives (from AD-416):
Screen novel citrus scion germplasm for unique fruit characteristics.
1b.Approach (from AD-416):
Fruit produced on citrus hybrids will be harvested at three times during the season to identify the maturity window for the particular selection. At the time of harvest data will be collected on fruit appearance (size, shape, presence of disease), rind color, ease of peeling, presence of seeds, soluble solids, total acidity, and taste (unacceptable, potentially acceptable, or acceptable). Scion selections identified worthy of further evaluation will be propagated onto commercial rootstocks for further evaluation.
This project is related to Objective 1 of the parent project: Evaluate citrus scion cultivars and advanced selections with potential for commercial use, identifying genotypes that will survive to bear age and produce high quality fruit for the fresh and juice markets. During the course of this project field trials were conducted to evaluate horticultural performance of advanced USDA citrus scion selections. Approximately fifty promising hybrid selections were identified, propagated and new field trials were established. New hybrids were created and established in the field. Field trials were established on both USDA property and with grower cooperators. During the course of this work two new citron scions were released, ‘US Seedless Pineapple’ sweet orange, and ‘US Early Pride’, a seedless mutant of the citrus hybrid ‘Fallglo’. Industry interest in ‘US Early Pride’ has been significant and commercial nurseries have received orders for thousands of ‘US Early Pride’ trees. Industry representatives were engaged in fruit evaluations and provided input regarding selection of promising hybrids for further evaluation.