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萝卜在我国蔬菜生产中占有重要的地位,在秋菜栽培面积中仅次于大白菜。‘国光’萝卜是从陕西耀县农家品种选育出来的一个较好品种,由于根形较长,给收获带来了一定困难,可溶性固形物含量较低。为了进一步提高产量、改进品质和提高商品价值,从1976～1981年,我们进行了‘国光’萝卜多倍体育种的研究。 材料与方法 供试材料为普通国光二倍体萝卜,用0.1％的秋水仙素水溶液,在25℃常温下,浸泡干种子6小时,取出后用清水冲洗干净,插种于露地,进行外部形态观察、叶气孔和花粉粒的测定及对花粉母细胞染色体进行镜检。确定了染色体倍性,这与1924年Karpec-henkc发现的萝卜2x=18,1938年Simonct发现的萝卜4x=36相一致。我们再以四倍体
Radish occupies an important position in the production of vegetables in our country, second only to Chinese cabbage in cultivated area of autumn vegetables. ’Guoguang’ radish is a better breed bred from Yao County of Shaanxi Province, due to the longer root shape, to bring some difficulties in harvest, soluble solids content is low. In order to further improve the yield, improve the quality and enhance the value of the commodity, from 1976 to 1981, we carried out the ’Guoguang’ radish polyploid breeding research. MATERIALS AND METHODS Materials for test: Common Guodian diploid radish, with 0.1% colchicine aqueous solution, at 25 ℃ at room temperature, soaked in dry seeds for 6 hours, rinsed with water after washing out, planted in the open, the external morphology Observations, determination of leaf stomata and pollen grains, and microscopic examination of pollen mother cells chromosomes. Chromosome ploidy was determined, which is consistent with 2x = 18 for radish found by Karpec-Hennk in 1924 and 4x = 36 for radish found by Simonct in 1938. Let’s take tetraploid again