摘要
本文研究比较了马铃薯实生种子选育中,新型栽培种(Neo-tuberosum)利用的6类不同组合方式产生的杂种实生种子在群体生产力和一致性上表现的差异,结果表明:①不同组合方式形成的具有不同Neo-tubersum基因频率的实生种子,群体间生产力表现极显著的差异。这一差异主要表现在产量构成因素上,商品薯数量和小薯数量对构成群体产量均有极显著的作用;小薯数量的增加对提高群体的商品薯率有极显著的负作用,即块茎数量越多,块茎越小。后代商品薯率取决于S.tuberosum种质,而块茎数量主要由Neo-tuberosum决定,并找出其生产力表现的优先顺序。②S.tuberosum×Neo-tuberosum组合表现的一致性水平在株高、薯形、皮色和芽眼深浅等性状上与S.tuberosum自交群体相似,没有显著差异,是利用新型栽培种进行实生种子选育的最佳组合方式。
This paper researched and compared the differences in productivity anp uniformity among the populations produced in six combinations by using Neo-Suberosum in TPS breeding. The results were as follows:There were remarkable differences in productivity among the populations formed in different combinations with different gene frequencies of Neo-Tuberosum. This was mainly shown in the constitutional factors of yield.The number of marketable tubers had an remarkable effect on the formation of population yield, and so had small tubers. The increase of the small tubers had a negative effect on improving the commercial tuber percentage of population, i. e., the more the number of tubers was the smaller the size of them.The percentage of progency commercial tubers depended on the germ plasm of S.tuberosum, and the number of tubers was mainly decided by Neo-Tuberosum. The prior sequence of its productivity was found out.The level of uniformity in the combination of S. tuberosum×Neo-tuberosum. was similar to S.tuberosum self cross populations and had no significant difference in the height of individual plant, tuber shape and colour and the depth of tuber eyes. So S. tuberosum×Neo-tuberosum is the optimum hybridization of selecting TPS by using Neo-Tuberosum.
出处
《马铃薯杂志》
1991年第3期134-140,共7页
Chinese Potato Journal
