Studies on the Heredity of the Traits Related to the Photoperiod-Sensitive Phenomenon Among the Temp

<正> The genetic study of characters concerning photoperiod sensitivity of the growth and development stages, plant and ear height was carried out from 5 temperate tropical combinations by using P1 , P2, F1, F2, BC1, BC2 generations mean analysis. The results showed that the square sums of additive, of dominance and of epistatic gene effects contributed to total genetic variance were 11. 3 -53. 6%, 36.0 -78. 6% and 5.5 -27.0% respectively for five traits of the insensitive×insensitive combination to photoperiod, which suggested dominance gene effect was the most important among various gene effects. In insensitive X sensitive combination to photoperiod, the square sums of additive gene effect with 66. 9 - 84. 5 %, of dominance gene effect with 11. 6 30. 7% and of epistatic gene effect with 1.4-5. 2% were found for five tested traits, which showed additive gene effect held a dominant position, and dominance and epistatic gene effects were reduced compared with insensitive×insensitive combination. The differ