| 摘要: |
| 【目的】 研究播期对大麦籽粒性状的影响，为大麦籽粒性状的改良和利用提供参考依据。【方法】 于2006-2008年，选用19个大麦材料，分3个播期，研究不同播期对大麦籽粒长度、宽度、厚度、长宽比和千粒质量的影响。【结果】 播期对大麦籽粒长度和宽度有显著影响，对籽粒厚度、长宽比和千粒质量有极显著影响。随着播期的推迟，大麦籽粒长度和长宽比增加，籽粒宽度、厚度和千粒质量减小。参试材料中，籽粒长度有9个同质群，籽粒宽度有6个同质群，籽粒厚度有5个同质群，长宽比和千粒质量各有10个同质群。籽粒的长宽比与粒长，千粒质量与粒厚、粒宽之间的相关性均极显著，相关系数分别为0.740，0.493和0.361。千粒质量与粒长、长宽比与粒厚之间相关系数分别为0.311和-0.291，达显著水平。【结论】 随着播期的推迟，大麦籽粒容积变小，早播有利于大粒的产生；由于遗传因素和环境因素的共同作用，大麦材料籽粒性状之间的差异呈现出千粒质量>长宽比>粒长>粒厚>粒宽；大麦千粒质量的高低与粒长、粒宽和粒厚关系密切，表现为粒厚>粒宽>粒长。 |
| 关键词: 大麦籽粒 籽粒性状 播期 |
| DOI： |
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| 基金项目:陕西省自然科学基金项目（2006C120）；西北农林科技大学育种专项 |
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| Effect of sowing date on grain traits in barley |
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LI Dan dan SI Long ting LUO Xiao mei LI Tao
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| Abstract: |
| 【Objective】 The study was to evaluate the effect of sowing date on grain traits in barley.【Method】 Grains havested from 19 barley materials with 3 sowing dates were measured with vernier caliper and balance. The data were analyzed with Excel and SAS software.【Result】 Sowing dates worked significantly on grain length(GL) and grain width(GW) at 0.05 level,and more significantly on grain thinkness(GT),Ratio of length to width(RLW) and 1 000 grain weight(1 000 GW) at 0.01 level;there were 9 homogeneous in GL,6 in GW,5 in GT,10 in both RLW and 1000 GW;correlations were significant at 0.01 level between RLW and GL,between 1000 GW and GT,and between 1000 GW and grain width. Their related coefficients were respectively 0.740, 0.493 and 0.361.Related coefficients were separately 0.311and -0.291 between 1000 GW and GL as well as between RLW and GT,which were significant at 0.05 level.【Conclusion】With the delay of sowing,the barley grain volume got smaller,so big grains could be produced under the conditions of early sowing;Grain traits of the barley showed 1000 GW>RLW>GL>GT>GW with the interaction of hereditary factors and environmental factors;The correlations between 1 000 GW of the barley and other grain traits were as follows:GT>GW>GL. |
| Key words: barley grain grain trait sowing date |
