Abstract
The authors compared the efficiency of mass selection and mother line selection for root weight and sucrose content using Donyu No. 2 orignal seed population. The ellipsis of equal probability deviation with P=0.05 was applied to the Donyu No. 2 population, and the mother lines out of ellipsis were selected at each quadrant as genetically superior lines, and were synthesized as a new population M, L and K respectively. Our experimental results showed no significant. difference between the original and mass selection population. The new synthetics M, L and K were significantly superior to the original population in root yield, but the same in sucrose content.
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