【摘要】 对 1 0个小麦品种 (系 )的株高构成指数进行了研究。结果表明 ,株高构成指数在品种间存在着极显著差异 ,该值的提高可通过杂交选择来实现。各I值与克草粒数、经济系数和籽粒产量均呈正相关 ,I1值与产量的相关达到了极显著水平 ,可作为高产育种的重要筛选指标。更多还原

【Abstract】 The plant height component Indexes were the proportions of peduncle length to the total length of peduncle and the second internode, and any other internode length to the total length of itself and its adjacent lower internode of the same plant. There were highly significant genetic differences among different varieties. The plant height component Indexes can be improved by artificial selection. There were positive correlations between the plant height component indexes and the harvest index, the spike grains/straw per stem ratio and grain yield. The correlation between the I 1 value and grain yield was highly significant, so the I 1 value can be regarded as an important criterion of selection in high-yield wheat breeding.更多还原