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自大规模利用高粱杂种优势以来,世界各国高粱生产中所用不育系,都是迈罗细胞质雄性不育系。近年,许多国家特别是美国,鉴于玉米大斑病和 T 型不育细胞质连锁造成玉米生产严重损失的教训,十分注意高粱单一细胞质雄性不育源可能产生的危险性。高粱育种家们从各方面努力寻找和培育新的高粱细胞质雄性不育源。1976年美国农业部和得克萨斯州农业试验站合作研究成功了一个新的高粱细胞质雄性不育系——A_2Tx2763和其保持系 B_2Tx2753,并已登记供推广应用。A_2Tx2753与康拜因·卡佛尔60A(3197A)在育性反应上完全不同。对于3197A 表现出恢复的某些品系与 A_2Tx2753
Since the large-scale utilization of sorghum heterosis, the sorghum production in the world are used in the sterile lines, are Mero cell line male sterile lines. In recent years, many countries, especially the United States, have paid great attention to the possible dangers of a single cytoplasmic male sterile source of sorghum in light of the serious damage caused by maize leaf spot and T-type sterile cytoplasmic linkage. Sorghum breeders work hard to find and cultivate a new source of sorghum cytoplasmic male sterility. In 1976, USDA and Texas Agricultural Experimental Station successfully collaborated to study a new sorghum cytoplasmic male sterile line, A2Tx2763 and its maintainer line, B_2Tx2753, which has been registered for popularization and application. A_2Tx2753 is completely different from the Conbine Courbet 60A (3197A) in fertility response. For 3197A, some lines recovered with A_2Tx2753