共查询到20条相似文献，搜索用时 46 毫秒
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B.K. Greener 《Asia Pacific viewpoint》2011,52(3):374-376
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棉花高品质种质系杂交后代纤维品质性状间的偏相关分析 总被引：3，自引：0，他引：3
以高品质的异常棉渐渗系J381和J415为母本,分别与苏棉12杂交,开展亲本P1、P2,杂种F1,回交后代B1、B2等6个世代纤维品质性状偏相关分析。结果,种质系J381和J415的纤维长度、比强度、麦克隆值、纺纱均匀性指数、回潮率等显著优于苏棉12,F1普遍为中亲值,B1偏向于J381或J415,B2偏向于苏棉12。亲本世代变异稍小,分离世代F2、B1、B2变异较大。偏相关分析表明,有7个性状在各世代均表现出一致的极显著相关,即长度、整齐度、比强度、反射率、黄度等两两间呈极显著负相关,与麦克隆值、纺纱均匀性指数均为极显著正相关;麦克隆值与纺纱均匀性指数间为极显著负相关。 相似文献
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L. Reitan S. Grønnerød T.P. Ristad S. Salamati H. Skinnes R. Waugh Å. Bjørnstad 《Euphytica》2002,123(1):31-39
Rhynchosporium secalis is a serious pathogen of barley (Hordeum vulgare L.) in central Norway. A breeding effort was initiated in 1977 to introduce resistance from different sources into adapted genotypes, and the first cultivar from the program was recently released. However, little is known about the resistance genes introgressed in this cultivar or in advanced breeding lines. An effort was made to address this issue through a set of isolates and available molecular markers. Fourteen breeding lines and their resistance donors were investigated by evaluating their reactions to 11 R. secalis isolates. Bulked segregant analysis was used to identify molecular markers linked to resistance genes in 12 of the breeding lines. The isolates were found to be of less discriminating value than the markers. Useful information has been obtained as to the nature of several of the resistance genes introgressed. Eight of the 12 breeding lines contained introgressed genes that were located at the `complex Rh' locus on chromosome 3H and hence may not easily be pyramided into the same genotype. Previous information about the nature of the resistance in `Jet' is questioned. Neither of the resistance genes Rh or Rh2 seems to have been incorporated into Norwegian breeding material. 相似文献
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为明确安徽亳州地区凤丹根腐病病原菌种类,观测了凤丹根腐病症状,通过对其病原菌分离纯化培养,依据病原菌形态特征、致病性、rDNA-ITS序列分析,鉴定病原菌种类。分离得到1种纯化菌株,其形态学特征与已报道的茄病镰刀菌(Fusarium solani)一致。在健康凤丹根部接种该分离培养的病原菌,引起的病害症状与田间症状相似。在Gen Bank进行同源性BLAST比较,该病原菌rDNA-ITS序列与4个已登录的茄病镰刀菌聚为一类,登录号为HQ176440.1、EU327190.1、HQ839783.1、JX524023.1。结果表明导致亳州栽培凤丹根腐病的病原菌为茄病镰刀菌。 相似文献
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