良种繁育 cultivating superior varieties and breeds ; elite seed production ; multiplication of superior cultivars
品种繁多 great varieties
种类繁多 wide varieties ; variety ; a great variety ; great varieties
同种繁殖 breed in and in
纯种繁殖 pure breeding
纯种繁育 pure breeding
种类繁多的 a variety of
种群繁殖力 population fecundity
繁殖种群 [生物] breeding population
可育期内繁种结实性是随海拔增高由低到高。
Seed bearing rate in fertile period gets better from low elevation to high elevation.
模拟杂交稻生产和制种繁种，表明利用苗期叶色标记结合人工去杂，可有效提高田间纯度。
Simulation test of hybrid rice production demonstrated that the purity of hybrid rice would be improved greatly by using leaf colour as a marker to eliminate the false hybrid rice at early stage.
植物生长调节剂在杂交水稻制繁种中有广泛的应用，并能显著地提高杂交水稻的制种质量和产量。
Plant growth regulators have wide application and have markedly increased in yield and quality in seed production and multiplication of hybrid rice.
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