马铃薯栽培种块茎还原糖及干物质含量的遗传分析

本试验采用不完全双列杂交方法,对马铃薯栽培种(新型栽培种、普通栽培种和二倍体杂种)的块茎还原糖及干物质的遗传变异进行了研究。结果表明,马铃薯栽培种间块茎还原糖及干物质含量的变异很大,并且主要是由基因加性效应引起的。块茎还原糖及干物质含量的遗传办分别为0.78和0.60,二性状间相关不显著,表明应用简单选择方法就可以选育出低还原糖和高干物质含量的品种。根据配合力效应估算,对供试材料及组合进行了评价。

THE INHERITANCE OF DRY-MATTER AND REDUCING SUGAR CONTENTS IN CULTIVATED POTATOES

The inheritance of tuber reducing sugar and dry-matter contents of cultivated potatoes(Neo-tuberosum, S. tuberosum and diploid hybrids)were studied in a partial diallel cross experiment. The results obtained were as follows:The variation of tuber reducing sugar and dry matter contents in cultivated potatoes was wide, and both of them were controlled mainly by gene additive effect. The estimates of heritability of tuber reducing sugar and drymatter contents were 0.78 and 0.60 respectively, and the correlation coefficient between the two characters was not significant, indicating that it is possible to abtain cultivars with lower ruducing sugar and higher dry-matter contents by simple selection. The evaluation to cultivars and progenies presented was made based on combining ability effects of the two characters.