One Guarantee guarantees purchase of hybrid rice seeds from regular seed companies and their entrusted sales outlets (seed holding the seed business license issued by the county seed management department and the business license issued by the business administration department). Seed companies are authorized as hybrid seed specialization departments at all levels of government. They have strong technical force, a sound seed quality assurance system, and a high quality and safety factor. The four eyes are visually judged by the unaided eye to determine whether the seeds are genuine or not. Specifically, after the stigmas are exposed, the vast majority of grains of hybrid rice seed are closed inside and out, and the exposed stigmas are trapped in the pods. A small black spot is left on one or both sides of the shell closure. According to the standard, the stigma exsertion rate should reach 50%, that is, 100 seeds should have 50 stigmas. Secondly, the color of many hybrid rice seeds is grayish white, and there are a few brown spots on the chaff, while the hybrids (including conventional rice seeds) are bright, bright, and free of spots. Thirdly, the color of the seed tip of most hybrid rice seeds is purple, and the tip of the conventional rice tip is colorless. The tip of the axillary tip is the closed tip of the two glumes, and the tip color can be used as a reference feature for distinguishing the authenticity of the hybrid rice seed. (4) Seeing that the closed degree of oleogamous hybrids is a cross-pollination, the open angle of the pods during flowering and pollination is large, and the female parent forms a hybrid after being pollinated. China Agricultural Network Editor
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