【摘要】 为了了解山西南部水地小麦育种发展趋势,对2012—2014年山西南部水地小麦区试的41份品系进行农艺性状比较分析、相关分析、通径分析。研究结果表明:穗长变异系数最大,为9.61%。产量三要素变异系数有效穗数>千粒重>穗粒数。多重比较分析表明,各年度间产量达极显著水平。参试品系与对照各农艺性状t检验均无显著差异。相关分析表明,产量与基本苗、有效穗数、生育期呈极显著正相关,与穗粒数显著正相关。通径分析表明,有效穗数、穗粒数、千粒重对产量的直接贡献较大,但综合作用中穗粒数最大。根据分析结果及山西南部生态条件,穗粒数是影响小麦产量的主要因素,在山西南部小麦育种过程中应该将穗粒数较多,千粒重稳定提高的小麦品系作为突破口。更多还原

【Abstract】 In order to understand the development trend of irrigated wheat breeding in southern ShanxiProvince, agronomic characters of 41 wheat lines in regional trial in southern Shanxi from 2012 to 2014 wereanalyzed by comparison analysis, correlation analysis and path analysis methods. The results showed that thecoefficient of variation of spike length was the highest, 9.61%. The variation coefficient of three factors of yieldshowed the number of effective spikes>1000- grain weight>grains per spike. Multiple comparative analysisshowed that there were extremely significant differences in yield among the years, but T test of the agronomiccharacters between the trial wheat lines and CK had no significant difference. The correlation analysis showedthat the yield was extremely and significantly positive correlated with the basic seedling, the number ofeffective spikes and growth period, and was significantly positive correlated with grains per spike. Path analysisshowed that the number of effective spikes, grains per spike and 1000- grain weight had a greater directcontribution to the yield, and grain number per spike was the largest contributor in the comprehensive effect.According to the analysis results and ecological conditions in southern Shanxi Province, grain number perspike was the main factor affecting the wheat yield. The wheat line which had more grain number per spike andstable improvement of 1000- grain weight should be the breakthrough point in wheat breeding process ofsouthern Shanxi.更多还原