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时间:2020-04-24
《浙江省近年来审定糯玉米品种主要性状演变分析-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、浙江农业学报ActaAgricuhuraeZhefiangensis,2014,26(3):537-542http://www.zjnyxb.cn吕桂华,徐秀红,陈坚剑,等.浙江省近年来审定糯玉米品种主要性状演变分析[J].浙江农业学报,2014,26(3):537-542.DOI:10.3969/j.issn.1004—1524.2014.03.O1浙江省近年来审定糯玉米品种主要性状演变分析吕桂华,徐秀红,陈坚剑,郭国锦(浙江省东阳玉米研究所,浙江东阳322100)摘要:统计20o0—2013年浙江省审定的42个糯
2、玉米品种的12项农艺性状和4项抗性性状,并对其演变情况和相关性进行分析。结果表明,浙江省近年来审定品种产量水平呈极显著上升趋势,平均每年提高225.9kg·hm~;审定品种与对照生育期相差天数逐年增加,平均每年比对照延迟0.429d;直链淀粉含量年际间呈极显著下降趋势,平均每年下降0.048%;单穗重呈显著上升趋势,平均每年上升4.55g,各审定品种的其他农艺性状,如生育期、株高、穗位高、穗长、穗粗、穗行数、行粒数、秃尖、千粒重在不同年份问无显著性增益。相关分析表明,各性状与产量的相关系数由大到小依次为穗长>生育期>
3、单穗重>株高>穗粗>行粒数>穗行数>穗位高>于粒重>秃尖,其中穗长、生育期与产量极显著正相关,单穗重、株高、穗粗和行粒数与产量显著相关。浙江省糯玉米品种突破性高产育种急需加强种质创新与改良,注重穗长和穗粗的选择,并持续降低直链淀粉的含量,适当延长生育期也有助于产量的提高。关键词:糯玉米;抗性;I种中图分类号:S513文献标志码:A文章编号:1004—1524(2014)03-0537-06EvolutionofagronomictraitsofwaxycorncultivarscertifiedrecentlyinZ
4、hejiangProvinceLYUGui—hua,XUXiu—hong,CHENJian-jian,GUOGuo—jin(DongyangMaizeResearchInstituteofZhefiangProvince,Dongyang322100,China)Abstract:Twelveagronomictraitsand4resistanttraitsof42waxycorncuhivarscertifiedduring2000to2013inZhejiangProvincewereanalyzed,andt
5、heirevolutionalanalysisandcorrelationswerealsodiscussed.Theresultsshowedthattheyieldofwaxycorncuhivarscertifiedexhibitedasignificantlyupwardtrend,withanaverageannualincreaseof225.9kg·hm~.Comparedwiththecontro1.thegrowthperiodofcultivarsdelayed0.429dannually.Amy
6、losecontentshowedasignificantlydownwardtrend,withanaverageannualdecreaseof0.048%.Singlepanicleweightrosesignificantlywithanaverageannualincreaseof4.55g,andtherewasnosignificantdifferenceinotheragronomictraitssuchasgrowthperiod,plantheight,earheight,earlength,ea
7、rdiameter,numberoflinesperrow,bald,andweightintheapprovedvarietiesamongyears.Furtheranalysisindicatedthatthecorelationcoeficientoftraitsandyieldwasdecreasedintheorderofearlength>growthperiod>singlepanicleweight>plantheight>eardiameter>kernelsperrow>rowsperear>e
8、arheight>thousandseedweight>bald.andtherewasasignificantpositivecorrelationbetweensinglepanicleweight,plantheight,eardiameter,kernelsperrOWandyield.Forthehighyieldbreedirlgo
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