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稻谷粒重是一个数量性状,可以认为其遗传力高于穗数和粒数。 稻谷粒重往往表现超亲遗传,所以有可能从小粒的亲本的杂交和选择而得到大粒的单株。根据这个原则,我们获得了千粒重达40～50克的一些品系。 谷粒长度、宽度和厚度与粒重呈显著相关,但是可以认为厚度对粒重的关系更为重要。粒长比粒宽和粒厚表现更大的超亲遗传。 超亲遗传有正向的(大于亲本)或负向的(小于亲本),但后者较为普遍。 同时我们发现粒重的变异系数较小,因此可以想象大穗大粒类型有可能使水稻在丰产性方面有所突破。
Grain weight is a quantitative trait that can be considered more heritability than the number of ears and grains. Grain weight tends to be super-progeny, so it is possible to obtain large-sized plants from the crosses and selections of small-sized parents. Based on this principle, we obtained a few lines of grain weighing 40-50 grams. Grain length, width and thickness were significantly correlated with grain weight, but it is believed that the relationship between grain weight and thickness is more important. Particle size and grain thickness than the performance of greater transgene heredity. Superheroes have a positive (greater than the parent) or negative (less than the parent), but the latter is more common. At the same time, we found that the coefficient of variation of grain weight is small, so it can be imagined that the big panicle type may make a breakthrough in high yield of rice.