小麦抗赤霉病性与产量性状的相关分析

对1975、1976、1979和1984年小麦品种资源进行了抗赤霉病性与产量性状的简单相关分析,并对1984、1985年小麦中抗—抗赤霉病品种(系)进行了表型相关、遗传相关和环境相关分析。小麦抗赤霉病性与株高、每穗粒数、穗中部最大小穗粒数表现正相关;与穗长关系不密切;与每穗小穗数和单株有效穗数没有相关;与小穗密度及千粒重的相关性较复杂,表现为正相关或负相关。小麦抗赤霉病新品种(系)的丰产性状已有改进,植株高度明显降低,每穗粒数和千粒重有所提高。

CORRELATION ANALYSIS BETWEEN SCAB RESISTANCE AND YIELD CHARACTERS IN WHEAT

A simple correlation between scab resistance and yield characters in the wheat collections of 1975,1976,1979 and 1984 was made.Phenotypic, genotypic and environmental correlation analysis were conducted as well in the varieties moderated resistant and resistant to wheat scab,collected in 1984 and 1985.The scab resistance associated positively with plant height,grains per spike and grains of largest spikelet;and apperared unclose relation with spike length and no correlation with spikelets per spike and available spikes per plant.The relationships between wheat scab resist- ance and spikelet density,1000-grain weight were uncertain with both posi- tive and negative correlation.The yield characters of new wheat varieties resistant to scab have been improved.The plant height has become lower significantly and the grains per spike and 1000-grain weight has increased.