US SuperSour 5

Bowman (2023) reports US SuperSour 5 as a Florida Mato pummelo seedling × Shekwasha cross. The exact Mato seedling accession is unspecified; Bowman gives only a collective 2000–2006 crossing window for SS2–SS5, not an SS5-specific cross year.^⁠[1]

The CRDF Project 21-008 report states that SS4 and SS5 were released in September 2023 and propagated for demonstration plantings and field trials. Bowman (2023) lists SS5's release year as 2023 but gives no month or day. The 2023 study describes unifoliate leaves in greenhouse plants and uses rooted cuttings for field-trial propagation.^⁠[2]⁠[1]

In the randomized 2014 Picos/St. Lucie County trial, grafted Valencia on SS5 produced 46.5 kg fruit/tree cumulatively in 2018–21 (35% above Swingle). The later six-season economic analysis reports 361 additional lb solids/acre and $1,291/acre more cumulative revenue than sour orange in 2022 dollars at 10% interest. These results describe grafted Valencia at this site; the later analysis revisits the same cohort.^⁠[1]⁠[3]