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1919年Hayes提出了在玉米育种中使用轮回选择的问题,1940年Jenkins再次提出此问题。轮回选择主要用于玉米的群体改良,或用于选育自交系。 美国在玉米育种中采用轮回选择法,改良了一批玉米群体,选育了不少自交系,已引起世界各国重视。目前,除玉米外,小麦、大麦、燕麦、水稻、高粱、大豆、烟草、甜菜、甘蔗、甘薯、苜蓿、三叶草等作物的育种也开始应用轮回选择法。这种方法所以受到重视,是有其原因的。首先,从轮回选择方法讲,虽然种类较多,但基本程序如图1所示:从原始轮C_0中分离出后代,经过试验、选择、鉴定出优良系;优良系重组(一般采用杂交、自由授粉)产生C_1轮,同样经过试验、选择、鉴定出优良系,再经过重组产
In 1919 Hayes raised the question of the use of recurrent selection in maize breeding, which was again raised by Jenkins in 1940. Reincarnation is mainly used for population improvement of maize or for breeding of inbred lines. The United States adopted the method of reincarnation in maize breeding, improved a number of maize populations and bred a lot of inbreds, which has drawn the attention of all countries in the world. At present, the breeding of crops such as wheat, barley, oats, rice, sorghum, soybeans, tobacco, sugar beet, sugar cane, sweet potato, alfalfa and clover has also begun to be applied by the cycle selection method. This method is therefore valued, for a reason. First of all, from the method of reincarnation, the basic procedure is shown in Figure 1, although there are many kinds of selection methods. The progeny are separated from the original round C_0, tested, selected, and identified as excellent lines. Good lines are recombined Pollination) to produce C_1 round, the same after testing, selection, identification of excellent lines, and then after recombinant production