Using the concept of heredity knowledge and its heredity coefficient of S-rough sets,it gives the concept of variation coefficient of knowledge,presents the theorem of attribute dependence of variation coefficient and the relation theorem of heredity-variation,and puts forward the heredity mining of knowledge and its algorithm in conclusion.

The difference markedness of the content of potassium in leaves of tobacco seedling was checked up among different genotypes with the variance analysis method, and the heritability in the broad sense, genetic variation coefficient of the c.

The results are as follows:①The broadsense heritabilities of height,diameter and volume of cloned seedings are 0897 8,0831 4 and 0808 1 respectively;genetic variation coefficients are 1582%,1402% and 4112%.

The study indicated that genetic variation coefficient of thirty seedlings of 9major quantiative traits of mass crossing generations ranged from 20.

Analysis of genetic variation and stability of the content of petroleum ether extracts in flue_cured tobacco leaves;

Studies on the genetic variation of 9 populations of Tricula by SSR-PCR;

Nucleocapsid protein gene′s genetic variation of Newcastle disease virus TL1 strain;

Study on genetic diversity in three northwest chicken populations;

Analysis of genetic diversity of GIFT strain Nile tilapia (Oreochromis niloticus) during selection processing by microsatellites;

Analysis on genetic diversity of four geographical populations of sea moss Gracilaria in the coast of waters south China;