甘蓝型油菜抗裂角材料资源的筛选

《甘蓝型油菜抗裂角材料资源的筛选》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、作物学报ACTAAGRONOMICASINICA2014,40(12):22032209http://zwxb.chinacrops.org/ISSN0496-3490;CODENTSHPA9E-mail:xbzw@chinajournal.net.cnDOI:10.3724/SP.J.1006.2014.02203甘蓝型油菜抗裂角材料资源的筛选董军刚董振生孟倩张博西北农林科技大学农学院,陕西杨凌712100摘要:抗裂角性是油菜机械化品种选育中的重要性状,筛选抗裂资源材料对于开展抗裂育种具有重要意义。

2、本文应用随机碰撞法和田间落粒法,对不同来源的75份甘蓝型油菜资源进行了抗裂角性鉴定。结果表明,抗裂角性在参试材料内存在较大的遗传变异。抗裂角指数(SRI)的范围为0.01~0.70,变异系数为70.70%。田间落粒率的范围为1.58%~55.51%,变异系数为62.53%。相关分析表明,SRI值与田间落粒率相关性不明显。对于易裂和抗裂材料,2种评价方法之间的差异小,而对于抗裂性中等的材料,2种评价方法之间差异大;田间落粒率、SRI与角果皮厚度的相关系数分别为−0.429和0.687,均达显著水平。因此,角

3、果皮厚度可作为田间筛选抗裂资源的辅助指标;利用2种方法筛选出1份抗裂性强材料Ny。Ny具有角果皮厚,果皮表面光滑的特点。在极端落粒情况下(黄熟后2周)Ny的落粒率为7.74%,正常落粒情况下(黄熟后1周)落粒率为1.58%,其抗裂角指数(SRI)值2011年和2013年分别为0.70和0.48,高于其他材料。关键词:甘蓝型油菜;抗裂角;材料筛选ScreeningofGermplasmwithResistancetoPodShatteringinRapeseed(Bras-sicanapusL.)DONG

4、Jun-Gang,DONGZhen-Sheng,MENGQian,andZHANGBoCollegeofAgronomy,NorthwestA&FUniversity,Yangling712100,ChinaAbstract:Shatteringresistanceisanimportanttraitforrapeseedvarietiessuitableformechanicalharvesting,thereforescreeningofgermplasmwithpodshatteringresist

5、anceisthebasicworkforthebreedingofshatteringresistance.Inthepresentpaper,weemployedtwomethods,includingrandomimpacttest(RIT)andshatteringpercentagetestinthefield,toevaluatepodshatteringresistanceof75accessionsofB.napus.Theseaccessionsdisplayedwidevariatio

6、ninshatteringresistanceindex(SRI)andshat-teringpercentage(SP)inthefield,whichrangedfrom0.01to0.70withthevariancecoefficient(CV)of70.70%forSRI,andfrom1.58%to55.51%withCVof62.53%forSPinthefield.Thesimplecorrelationanalysisshowedtherewasnocorrelationbetweenp

7、odSRIandSPinthefieldwhenallaccessionsincluded.However,fortheaccessionswithstrongorweakshatteringresistance,therewasnodifferencebetweentwomethods,exceptfortheaccessionswiththeshatteringresistancebetweenstrongandweakones.TheSPandthewallthicknessofpodhadsign

8、ificantlynegativecorrelation(r=−0.429),podSRIandthewallthicknessofpodhadsignificantlypositivecorrelation(r=0.687).Thus,thepodwallthicknesscanbeusedasanauxiliaryindextoscreenshatterresistantgermplasm.AgermplasmNywith