Results showed that:(1)the additive variation was principal in 12 leaf morphological characters such as second leaf width and flag leaf width;the nonadditive variation was principal in distance between flag leaf and second leaf,flag leaf droopy angle as well as specific leaf weight.

Analysis of gene effects on asexual reproductive characters in silkworm(Bombyx mori L.);

Study on additive dominant genetic model and gene effects was conducted on the data of 4 populations white 338 litters including Erhualian pigs(P\-1), Large Whith(P\-2), first cross(F\-1) and backcross(B\-2).

The maternal effects and gene effects on body weights at birth (BWB), 20 days of age (BW20) and 60 days of age (BW60) in pigs were estimated by least square multiple regression procedure, using group least square means of Erhualian (EHL), Large White (LW) and their F 1, F 2 and backcross (to LW pigs) (8 groups of animals in total).

Study on additive-dominant genetic model and gene effects on litter size in Erhualian pigs and Large White;

In order to estimate gene effects on plant height, days to heading, panicle length, spikelets per panicle, spikelets density and mean grains per spikelet in the tested lines, each of the two tested lines was crossed with a set of 3 tester lines which had great genetic diversity in various characters, each combination has got 6 generatio.

In this paper, the genetic basis of heterosis is analyzed from genetic difference, gene expression, gene effects, and gene network system.