小麦异源(黑麦)重组系主要育种目标性状相关研究

THE CORRELATION ANALYSIS AMONG MAJOR BREEDING OBJECTIVE CHARACTERS IN WHEAT-RYE RECOMBINANT LINES

本文对小麦异源（黑麦）重组系主要育种目标性状间相关的程度与性质进行了分析。结果表明：抽穗期与小穗数、株高与蛋白质含量、千粒重与穗粒重以及穗粒数与穗粒重均呈极显著的正偏相关。千粒重与穗粒数呈极显著的负偏相关。其余性状间相关均不显著。千粒重和穗粒数的负偏相关对小麦异源（黑麦）重组系的遗传改良有重大影响，打破该相关也相当困难。其次，株高与蛋白质含量以及抽穗期与小穗数的正相关关系对选育多小穗和高蛋白质含量有一定的不利影响。文中对千粒重与穗粒数的协调以及与高蛋白质含量的结合问题进行了讨论。

The partial correlation coefficients among 7 characters in wheat-rye recombinant lines were studied. The positive significant correlations were found between heading date and spikelet number per spike, plant height and protein content, 1000-grain weight and grain numbers per spike ,grain number per spike and grain weight per spike, respectively. But a negative significant partial correlation was found between 1000-grain weight and grain numbers per spike. The other correlations involved in the seven characters were not significant. The positive correlation between 1000-grain weight and grain numbers per spike, plant height and protein content, heading date and spikelet number per spike, have disadvantageous effect on the genetic improvement of wheat-rye recombinant lines. In the paper, the combination among 1000-grain weight, grain numbers per spike and multispikelet have been discussed. Furthermore, how to coordinate these disadvantage correlations was discussed.