Morphological Profile and Seed Yield Ability of Polignano and Tiggiano Carrot Landraces: Steps Toward Registration as Conservation Varieties

Several Apulian (Southern Italy) vegetable landraces are considered at risk of genetic erosion, constituting an issue for the loss of important genetic traits. 'Tiggiano' and 'Polignano' carrots are two Apulian landraces, noteworthy for their historical, cultural, and agricultural significance. In this research, both the morphological traits and seed yield ability of these landraces were evaluated, aiming to potentially register them for seed commercialization as a tool of valorization. The data of morphological traits according to the 'International Union for the Protection of New Varieties of Plants' guideline evidenced a clear distinction between the two landraces. However, the great variability observed in certain characters represents an obstacle to their registration in the national variety register, except for the Conservation Varieties one. 'Polignano' and 'Tiggiano' carrots showed an average seed yield of about 63 and 106 g/plant, equating to about 1258 and 2116 kg/ha. Average seed germination rates were 79.7 and 85.8%, respectively, for 'Polignano' and 'Tiggiano' carrots. In conclusion, registering these local varieties as Conservation Varieties could enhance their appreciation, encourage sustainable cultivation, and help mitigate genetic erosion while boosting their economic and cultural value.