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新疆各地的Sc704玉米制种田里,一些母本植株于抽雄散粉期后,常发生自上而下变紫,最后发黄枯死的现象,严重者成片成片枯死,致使种子产量锐减.一些生产大田里,也常有类似的枯死植株.其枯死原因,众说纷纭.为了查明这些植株枯死的原因,我们于1987和1988年春,分别在乌鲁木齐八一农学院试验场和海南岛对Sc704的母本ZPL773作了如下三种处理的试验:(1)用生长正常的同一果穗上的种子,分别播两行,行长4.5米,行距60厘米,株距25厘米,每行留20株(行头留双株),抽穗前对雌穗人工套袋,抽穗后对其中一行人工授粉,另一行始终不予授粉;(2)播种方法同上,抽穗前对同一穗行的20个植株,同时套袋,抽穗后任对
In the field of Sc704 corn grown in Xinjiang, some maternal plants often turn purple from the top to the bottom after the powder is loosened and the yellowish-yellow phenomenon finally occurs. In severe cases, In the field of production, there are also often withered plants, and the causes of their death vary widely. In order to find out the causes of these plants withering, in the spring of 1987 and 1988, respectively, Urumqi Bayi Agricultural College Experimental Site and Hainan Island Sc704’s mother The ZPL773 has been tested in the following three treatments: (1) The seeds of the same ear with normal growth were sowed respectively for two rows with a length of 4.5 meters, a row spacing of 60 cm and a spacing of 25 cm, with 20 lines in each row Double strain), the artificial ears were bagged manually before heading, one of them was manually pollinated after heading, and the other row was never pollination; (2) The method of sowing was the same as above, with 20 plants on the same ear before heading, After heading any right