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对小麦云麦39、靖麦5及高加索3个品种进行考察,探讨主茎的根、茎、叶、分蘖节及穗等性状与小麦单株有效分蘖数的相关关系。研究结果表明:在根的性状中,根的平均粗度及一次根数(次生根数)与单株有效分蘖数均呈极显著正相关;小麦单株有效分蘖数与分蘖节直径有显著正相关,而与分蘖节长没有显著相关关系。单株有效分蘖数与第一节间长,第一节间粗均有极显著的正相关;单株有效分蘖数与主茎旗叶长有显著正相关。在穗部性状中,单株有效分蘖数与穗长、穗粒数、小穗数、穗粒重之间存在极显著的正相关,与退花小穗关系不显著。
The wheat Yunmai 39, Jingmai 5 and Caucasus were inspected for the relationship between the main stems of the root, stem, leaf, tiller node and spike traits and the effective number of tillers per plant. The results showed that there was a significant positive correlation between average root thickness and primary root number (secondary root number) and effective tiller number per plant in root traits. The effective tiller number per plant and the diameter of tiller node were significantly positive But no significant correlation with tiller node length. The number of effective tillers per plant was significantly and positively correlated with the length of the first node and the first internode. The number of effective tillers per plant had a significant positive correlation with the length of flag leaf of main stem. In panicle traits, the number of effective tillers per plant had a significant positive correlation with spike length, number of spikelets, number of spikelets and grain weight per spike, but had no significant relationship with the number of spikelets returned.