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根据作物最佳遗传优势部位进行定位选种,是一项科学的选种技术。这样选出的种子能够把一个品种的所有优良性状遗传给下一代,经济有效地实现增产增收。据试验,水稻穗子最佳部位的种子发芽率可达100%,播种后秧苗生长整齐健壮,抗逆性强,分蘖快,可增产一成以上;玉米用果穗最佳部位的种子可增产6.2%～3.7%,成熟期可提早3～4天;土豆用最佳部位的芽眼作种,产量比用其它部位芽眼作种的可增产26%。水稻:最佳部位是稻穗中部所结籽粒。选种的具体方法是:在种子田或纯度高的大田中,精细选
According to the site of the best genetic advantages of crop location selection, is a scientific selection technology. The seeds thus selected are able to pass on all the fine traits of a variety to the next generation and achieve cost-effective production increase. According to the experiment, the best part of rice tassel seed germination rate up to 100%, after sowing seedlings grow neatly sturdy, strong resistance, tillering fast, yield can be increased more than 10 percent; corn ear with the best parts of the ear can increase 6.2% ~ 3.7%, and the maturity period could be 3 ~ 4 days earlier. Potatoes were planted as buds with the best parts, and the yield could be increased by 26% compared with buds with other parts. Rice: The best part is the grain in the middle of rice. The specific method of selection is: in the field of seed or high purity field, fine selection