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为了开发新的半矮生遗传资源供育种利用,于1982—1984对二个籼稻矮生突变系、三个半矮生品种和一个高秆地方品种的半双列式杂交组合的F_1代株高的测定、F_2代株高的分离以及F_3代株系的检验,获得主要结果是:（l）从“竹莲矮”诱变来的“丛生竹莲矮”（极矮生性）和从IR_(24)自然突变而来的“特矮稻”（矮生）杂交,F_1代表现半矮生（96.5cm）,F_2代分离呈半矮生、矮生和极矮生三个峰,接近于9:4:3。经F_3代的株系检验肯定为二对基因的遗传,表明双亲各具有一对不等位的矮生基因(dz和dt）。由于相互对应的位点上各自存在有显性基因,故其基因型分别假定为dzdzDtDt和DzDzdtdt。（2）从粳（半矮）籼（高秆）杂交选育而来的半矮生品系“垫杂104”和“矮南特”杂交,F_1代表现半矮生,F_2代呈现以半矮生为均数的单峰正态分布,F_3的检验表现双亲等位。另一半矮生地方品种“南充一支蜡”与“矮南特”和“垫杂104”杂交,F_1代均为高秆,F_2代呈9高:6半矮:1卫矮生的分离,并经F_3的验证,都表明双亲不等位。（3）两个矮生系分别与“矮南特”和“垫杂104”杂交,均为一对基因之差,呈3半矮:1矮的分离,并经F_3验证,显示“矮南特”（或“垫杂104”）的基因型具有该二矮生亲本所各具有的一对显性基因,即DzDzDtDt;与“一支蜡”杂?
In order to develop a new semi-dwarf genetic resource for breeding use, the F 1 plant height of two-double crosses of two indica rice dwarf mutant lines, three semi-dwarf varieties and one high-stalk landraces from 1982 to 1984 The main results obtained were as follows: (1) “Congruzhitongshuai” (very dwarfism) mutagenized from “Zhulian short” and from “ (Dwarf) which naturally mutated, F_1 represents the semi-dwarf (96.5cm), F_2 generation separated three semi-dwarf, dwarf and extremely dwarf three peaks, close to 9: 4: 3. The F_3 lines tested positive for the inheritance of two pairs of genes, indicating that each parent had a pair of dwarf genes (dz and dt) that are not equal. The genotypes are assumed to be dzdzDtDt and DzDzdtdt, respectively, due to the presence of dominant genes on the corresponding loci. (2) Semi-dwarfing lines ”Dao 104“ and ”Dana Nan“ were obtained from the cross between japonica rice (semi-dwarf) indica (high stalk), F_1 was semi-dwarf and F_2 was semi-dwarf Health as a mean single peak normal distribution, F_3 test showed parental parity. The other half dwarf landraces ”Nanchong a wax“ hybridized with ”Diana Nan“ and ”Mianza 104“. F_1 generation were tall stalks and F_2 generation was 9 high: And verified by F_3, both parents show that the other place. (3) The two dwarfism hybrids with ”Dana Nante“ and ”Mianza 104“, respectively, are a pair of genetic differences, showing three semi-dwarf: 1 short segregation, and verified by F_3, (Or ”maize 104“) genotypes have a pair of dominant genes each of the two dwarf parents have, DzDzDtDt; and ”a wax" hybrid?