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一、引言电离辐射育种在许多国家进行了一系列的研究,创造了许多具有经济性状的变异类型,例如已育成抗锈病、抗倒伏的小麦、高产的大麦、花生、芝麻、大豆、豌豆,以及高产的抗菌素等。在蚕业上日本、苏联学者利用电离辐射的引变方法获得了能从蚕卵的色泽上识别雌雄性的新蚕种,为蚕辐射选种创造了新的途径。广东气候变化较大,特别是三至六造高温多湿,蚕易生病,蚕茧生产不稳定,加上近两年来三至六造推广良种“南农七号”的原种发生退化,严重地威胁生产,据此我们从1957年开始利用电离辐射结合杂交和选择等方法,试图选育出抗病力強生产稳定,适应于本省复杂环境的新蚕种。
I. INTRODUCTION Ionizing radiation breeding has carried out a series of studies in many countries and has created many types of variation with economic traits such as resistance to rust, lodging resistant wheat, high yield barley, peanut, sesame, soybean, pea, and High yield of antibiotics. In sericulture, Japan, Soviet scholar obtained a new silkworm that can identify male and female from the color of silkworm eggs by using the method of change of ionizing radiation, which created a new way for radiation selection of silkworm. Guangdong has a large climate change, especially three to six high temperature and humidity, easy disease of silkworm and unstable cocoon production. In addition, the progeny of “Nongnong No.7”, a popularized variety of three to six made in the past two years, degenerated and threatened seriously According to this, we began to use ionizing radiation combined with hybridization and selection methods from 1957 to try to breed new silkworm varieties with stable disease resistance and complex environment in our province.