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应用莫惠栋等新近提出的p+q+2pq交配设计及其分析方法,分析了籼-粳杂种5个品质性状的遗传表达。试材的p=4,q=5。结果表明:（1）粒长、粒宽的遗传受母株基因型控制,它们在F_2米粒（着生在F_1植株上）间没有发生遗传分离;糊化温度和直链淀粉含量则在F_2米粒间有极显著的遗传分离,故主要受胚乳基因型控制。（2）各性状的遗传变异均以加性为主,显性为次;在总遗传方差中,加性方差占55.60％（糊化温度）～79.35％（粒宽）,显性方差占8.32％（直链淀粉含量）～32.10％（粒长）。籼、粳亚种间的细胞质差异对品质性状有影响,但出现频率较低,作用较小;细胞质方差仅占总遗传方差的0.27％（粒宽）～3.56％（直链淀粉含量）。（3）垩白度受环境的影响很大,其误差变异系数高达193.47％,约为粒长、粒宽、糊化温度的40倍;除杂种间差异外,其余项目均被误差掩盖,不能发现。
Using the newly proposed p + q +2 pq mating design and its analysis method proposed by Mo Huidong et al., The genetic expression of five quality traits in indica-japonica hybrids was analyzed. The test sample p = 4, q = 5. The results showed that: (1) The inheritance of grain length and grain width was controlled by the genotypes of the maternal plants. No genetic segregation occurred between them in F_2 rice grains (F_1 plants); the gelatinization temperature and amylose content were in F_2 rice grains Between the very significant genetic separation, it is mainly controlled by the endosperm genotype. (2) The genetic variation of each trait was mainly additive, the dominant was secondary; among the total genetic variance, the additive variance accounted for 55.60% (gelatinization temperature) ~ 79.35% (grain width), the dominant variance accounted for 8.32 % (Amylose content) ~ 32.10% (grain length). The cytoplasm difference between indica and japonica subspecies affected the quality traits, but the occurrence frequency was lower and the effect was smaller. The cytoplasmic variance only accounted for 0.27% (grain width) ~ 3.56% (amylose content) of the total genetic variance. (3) Chalky degree is greatly affected by the environment, and the error coefficient of variation is as high as 193.47%, which is about 40 times of the grain length, grain width and gelatinization temperature; all the items except for the differences among the hybrids are covered by the error and can not Find.