期刊
EUPHYTICA
卷 151, 期 1, 页码 79-86出版社
SPRINGER
DOI: 10.1007/s10681-006-9130-7
关键词
carotenes; Daucus carota; HPLC
Broad sense heritabilities and gene numbers were estimated for the production of total carotenoids and the major component carotenoids of carrot storage roots: phytoene, zeta-carotene, beta-carotene, alpha-carotene, and lycopene. Two crosses with different backgrounds were evaluated: orange B493 x white QAL and orange Brasilia x dark orange HCM. The HCM (high carotene mass selection), Brasilia and B493 parents had both alpha-carotene and beta-carotene, but HCM had proportionally more alpha-carotene. Carotene content in F (2) populations ranged from 522 ppm to 1714 ppm in Brasilia x HCM and from 0 to 695 ppm in B493 x QAL progeny. F (2) plants segregating for absence of alpha-carotene were identified in B493 x QAL. Broad-sense heritabilities ranged from 28% to 48% for all carotenes except lycopene and phytoene where estimates were 44% to 89% in the Brasilia x HCM cross, All heritability values exceeded 88% for the B493 x QAL cross, except one estimate for lycopene. The estimated number of genes was 4 conditioning alpha-carotene, 2 to 3 each for beta-carotene and total carotenes and one each for zeta-carotene, lycopene and phytoene in the orange x dark orange cross. In the orange x white cross, the estimates were 4 genes for alpha-carotene, 1 to 2 each for lycopene and total carotenes and 1 for each of the other carotenes. These results are in general agreement with QTL studies and they provided evidence for continuous inheritance of alpha-carotene, beta-carotene and total carotenoids in the orange x dark orange cross and discrete inheritance for beta-carotene and total carotenoids in the orange x white cross.
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