Abstract: 【Objective】The study aimed at the reason of color difference between two pulp types by investigating the changes of their carotenoid component amounts during fruit coloring.【Method】 Carotenoid components in cultivars of Daohongpao and Qingzhong that belong to two different Loquat pulp types were extract, purified and determined using HPLC since the start of fruit coloring, 【Result】The results were as follows: Lutein content of pulp decreased rapidly at first and then slowly, however, the amounts of the other 4 carotenoid compositions increased gradually, and went up quickly 7-14 days before maturation. 【Conclusion】 Carotene content, especially β-carotene content, was the major carotenoid component affecting pulp color levels between the two cultivars of ‘Daohongpao’ and ‘Qingzhong’ .

Key words: Loquat, Carotenoid, β-Carotene, Lutein