共查询到20条相似文献,搜索用时 62 毫秒
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以4个粳稻品种种子为材料,用150Gy的 60Co-γ射线辐照诱变,经系谱法选择6代后收取后代材料米样进行稻米品质性状分析。研究结果表明:经 60Co-γ射线辐照后4个粳稻品种后代在稻米品质各性状上均发生变异,平均变异系数为3.43%~35.60%,性状变异幅度和分离方向与基因型有关,表明辐照诱变可以为北方粳稻品质育种提供丰富种质资源和有效途径;t检验显示不同品种间后代部分品质性状差异达显著或极显著水平;米饭粘度和平衡度与亲本间相关性达到极显著水平,表明通过这2个参数预测 60Co-γ射线辐照处理后代材料的可行性;相关分析表明食味值与部分淀粉RVA谱特征值间存在极显著或显著相关性,这可为辐照处理后代材料稻米品质评价提供依据。 相似文献
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施氮量与栽插密度对粳稻品种品质的影响 总被引:1,自引:0,他引:1
以武育粳3号为供试材料,研究了施氮量和密度对稻米主要品质性状的影响,结果表明:(1)氮肥施用量能提高稻米出糙率,而栽插密度则对出糙率无显著影响,二者互作效应不显著。对精米率,随着施氮量的增加而显著上升,随着密度的加大显著下降,且两者对精米率的互作影响达极显著水平。整精米率也随施氮量增加而显著上升,随着密度的加大是先上升后下降,两者互作效应不显著。(2)垩白粒率、垩白大小、垩白度均随着施氮量的上升而下降。(3)直链淀粉含量随着施氮量增加而显著下降,栽插密度对直链淀粉含量影响不显著。胶稠度随着施氮量增加而呈变软趋势,随着栽插密度的加大而先变软后变硬,差异显著。(4)粗蛋白随着施氮量的加大而显著的上升,栽插密度和施肥量对粗蛋白影响存在极显著的互作。 相似文献
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粳稻恢复系数量性状的因子分析 总被引:1,自引:0,他引:1
应用因子分析方法,对在粳型杂交稻育种中选择的78份恢复系的10个数量性状进行分析。结果表明,在10个数量性状中可提取实粒数因子(F1)、粒重因子(F2)、结实因子(F3)、株高因子(F4)、穗长因子(F5)等5个公因子,其累计可表达总变异的92.03%。其中F1因子同F4因子间为正相关,同其他因子间均为负相关,F2因子与F3、F4、F5因子间为正相关。F3因子与F4间为正相关,与F5因子间为负相关,F4与F5因子间为负相关。78个恢复系材料根据因子得分进行系统聚类,共分为5个不同遗传差异的类群。 相似文献
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选用直立穗型近等基因系作为材料,研究了粳稻直立穗型基因对米质性状的影响。结果表明,直立穗型基因对碾米品质和外观品质有负面影响,它使整精米率明显下降,垩白粒率和垩白度明显增加,外观品质变劣;但直立穗型基因对蒸煮食味品质有正面影响,虽然一定程度上降低了直链淀粉含量和胶稠度,但却显著增加了食味值;对营养品质的影响主要表现在显著降低了总蛋白和谷蛋白含量,增加了清蛋白、球蛋白和醇溶蛋白含量;对淀粉RVA谱特征值的影响不大,只是使冷胶黏度和消减值有所增加,峰值黏度、热浆黏度和崩解值变化不大。整精米率、直链淀粉含量、谷蛋白含量、总蛋白含量和淀粉冷胶黏度等米质指标在直立穗型内不同粒位间变异较大,而垩白粒率、垩白度、食味值、胶稠度和淀粉消减值等米质指标在弯曲穗型内不同粒位间变异较大。直立穗型品种着粒密度大和二次粒率高可能是近等系间某些米质指标相差较大的主要原因。 相似文献
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旱育秧在杂交水稻制种上的应用 总被引:1,自引:0,他引:1
在杂交水稻Ⅱ-32A×泸恢17的两个亲本播始天数相近的杂交水稻制种上,通过对旱育秧与常规湿润育秧两种不同育秧方式的制种试验对比得出:旱育秧不仅能节约制种成本,而且同样可以实现制种的高产稳产.此外,旱育秧制种会延长亲本的播始天数,而且父本表现比母本更明显,即父本要比母本多推迟4 d左右始穗.试验表明:为确保制种花期相遇,此时旱育秧制种的父本应比母本提早播种7 d以上,具体的父母本播差天数应以Ⅰ期父本播后的气温高低而定. 相似文献
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《分子植物育种》2015,(9)
<正>Rice Genomics and Genetics(ISSN 1925-2021)is an international,open access,peer reviewed journal,committed to serve for rice genome research,rice genetics research and rice breeding,particularly publishing innovative research findings in the basic and applied fields of rice molecular genetics and novel techniques for improvement,as well as 相似文献
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《分子植物育种》2015,(7)
<正>Rice Genomics and Genetics(ISSN 1925-2021)is an international,open access,peer reviewed journal,committed to serve for rice genome research,rice genetics research and rice breeding,particularly publishing innovative research findings in the basic and applied fields of rice molecular genetics and novel techniques for improvement,as well as applications of molecular enhanced products.Rice Genomics and Genetics(ISSN 相似文献
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《分子植物育种》2015,(8)
<正>Rice Genomics and Genetics(ISSN 1925-2021)is an international,open access,peer reviewed journal,committed to serve for rice genome research,rice genetics research and rice breeding,particularly publishing innovative research findings in the basic and applied fields of rice molecular genetics and novel techniques for improvement,as well as applications of molecular enhanced products.Rice Genomics and Genetics(ISSN 相似文献
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《分子植物育种》2015,(6)
<正>Rice Genomics and Genetics(ISSN 1925-2021)is an international,open access,peer reviewed journal,committed to serve for rice genome research,rice genetics research and rice breeding,particularly publishing innovative research findings in the basic and applied fields of rice molecular genetics and novel techniques for improvement,as well as applications of molecular enhanced products.Rice Genomics and Genetics(ISSN1925-2021)is archived in Library and Archive Canada and deposited in Cross Ref.The Journal has been indexed by Pro Quest as well.Authors from low-income countries and areas or having financial difficulties can apply the discount for APC upon submission,and 相似文献
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《分子植物育种》2015,(12)
<正>Rice Genomics and Genetics(ISSN 1925-2021)is an international,open access,peer reviewed journal,committed to serve for rice genome research,rice genetics research and rice breeding,particularly publishing innovative research findings in the basic and applied fields of rice molecular genetics and novel techniques for improvement,as well as applications of molecular enhanced products.Rice Genomics and Genetics(ISSN 相似文献
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《分子植物育种》2015,(11)
<正>Rice Genomics and Genetics(ISSN 1925-2021)is an international,open access,peer reviewed journal,committed to serve for rice genome research,rice genetics research and rice breeding,particularly publishing innovative research findings in the basic and applied fields of rice molecular genetics and novel techniques for improvement,as well as applications of molecular enhanced products.Rice Genomics and Genetics(ISSN 相似文献