Abstract: Among 56 seedlings with red--colored cotyledons and hypocotyls obtained after hand pollination betweed Camellia pitardii var. yunnanica (hexaploid) and C. chrysantha (diploid), 55 (98.2%) were of true tetraploid-hybrids (X2 = 0.0128, D. f. = 1, 0.95> p >0.90), while among 50 seedlings with yellowish-white-colored cotyledons and hypocotyls, 13(26%) were of true tetraploid-hybrids (X2 = 27.38, D. f. = 13, 0.02> P >0.01). In contrast, among 78 seedlings with red-colored cotyledons and hypocotyls obtained after hand pollination between C. reticuIata (hexaploid) and C. chrysantha, 77(98.7%) were of true tetraploid-hybrids (X2 = 0.0l28, D. f. = 1, 0.95> p >0.90), while among 78 seedlings with yellowish- white-colored cotyledons and hypocotyls, 2l (26.9%) were of true tetraploid-hybrids (Xz = 4l .65, D. f. = 24, 0. 02> p >0.01).

Key words: Artificial hybrids) Camellia chrysantha