How to compare the parthenocarpic ability of fruits? Or what is the standard to decide that a material has high or low parthenocarpic ability? Is there a clear number?
the ovary origin of fruit tissue that is the fruit body varies with species, as well the ability of growing the fruit body indipendently of a viable embryo. Genetic mutations can be selected by growers but to know about a species it is advised to seartch in specific literature under the possible occurrence of mutants or auxin or GA treated plants
If you are simply wanting to measure parthenocarpic ability of certain plants, grow them as normal without the presence of pollinators and check for "yield". If your species is self-pollinating, you will probably need to emasculate in order to really check. More information is needed.