Reassessment of Practical Subspecies Identifications of the USDA Daucus carota L. Germplasm Collection: Morphological Data

摘要: The genus Daucus includes about 20 recognized species. most widespread and economically important species, carota L., occurs on almost every continent. cultivated carrot, subsp. sativus (Hoffm.) Schubl. G. Martens, has been selected from wild populations that are extremely diverse, especially in the western Mediterranean. predominant outcrossing lack of sexual isolating mechanisms among infraspecific taxa complicate taxonomy identification populations, resulting widely different interpretations number taxa. We measured 36 morphological characters multiple individuals within each 155 accessions D. morphologically similar species capillifolius (both 2n = 18) alongside other for comparison (D. aureus Desf., 22; broteri Ten., 20; involucratus Sm., littoralis 20) an experimental field plot. Within carota, multivariate analyses were able to identify only two subspecies, but even these showed great overlap individual characters. Because ease crossability domestic landraces cultivars because taxonomic challenges, purpose our study is explore support subspecies including phenetically capillifolius, which part same clade as with long-term goal resolving disagreements developing a practical system classify variation this