【摘要】 以鲁麦１２等为材料进行幼层培养，转分化前辐照１０００ｒａｄ，在Ｒ２代调查千粒重变异情况，结果表明，后代千粒重发生了显著变化，变异范围为３９．５—６８．５ｇ．突变率高达６３．０８％，最高千粒重超过对照４０．９５％。已选出一批大粒材料应用于生产．其中核生二号新品种千粒重６５ｇ，杂交后代表明，大粒变异多为显性突变。更多还原

【Abstract】 The young embryo of "Lumei No.12" was cultured.Their callus was treated with 60 Co-r rays of 10Gy just before diffarenhation.The variation result of 1000-kernel-wcight in R2 yeneration showed that the 1000-kernel-Wedt changed wiificantly in the progenies with a range of 39.5-68.5g,and the mutation rate ap to 63.08%,the po 1000-kernel-wegh was 40.95% her than that of CK.A few strains with macro-kernel have been selected and applied cd ptoduction.TIle new wanety of"HESHENG No.2" with 1000-kernel-weight Of 65g is one of them.The hybridhation progenies also showed that most macro-kernel variat6ions are dominant mutations.更多还原