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用MNU(N-甲基-N-亚硝基脲)处理水稻的受精卵诱发突变比处理种子有效得多,可获得与品质有关的各种突变。 1.突变体的诱发处理处于单细胞的受精卵的颖花,用0.75mM的MNU的水溶液浸渍1小时,然后用流水冲洗24小时,供试品种为金南风,该品种几乎不出现心白。稻米品质的突变,通过分析成分再选择,效率很低,所以,参考了玉米各种成分的外部特征,从M_2种子的糙米外部特征来选择突变体。本文只叙述糯性、暗色、糖质、皱缩、粉质及心白等胚乳突变和巨胚
Treatment of fertilized ova in rice with MNU (N-methyl-N-nitrosourea) is much more efficient than treatment of seeds, and various quality-related mutations can be obtained. 1. Mutagenesis The spikelets on single-cell fertilized eggs were immersed in 0.75 mM MNU for 1 hour and then rinsed in running water for 24 hours. . The mutation of rice quality is very inefficient by analyzing the components and then selecting the mutants from the external characteristics of brown rice of M_2 seed with reference to the external characteristics of various corn components. This article describes only the waxy, dark, sugar, shrinkage, silty and heart white endosperm mutation and giant embryo