甘蓝型油菜自然群体苗期磷效率分析及磷高效优异种质筛选  

Analysis of phosphorus efficiency and screening of P-efficient germplasm on natural population of oilseed rape (Brassica napus) at seedling stage

作　　者：陈燕玲 王宁 石磊[2] CHEN Yan-ling;WANG Ning;SHI Lei(Pingliang Agricultural Products Quality Safety Inspection and Testing Center,Pingliang 744000,China;National Key Lab of Crop Genetic Improvement,Huazhong Agricultural University,Wuhan 430070,China)

机构地区：[1]平凉市农产品质量安全与检验检测中心,甘肃平凉744000 [2]华中农业大学作物遗传改良国家重点实验室,湖北武汉430070

出　　处：《中国油料作物学报》2023年第1期56-62,共7页Chinese Journal of Oil Crop Sciences

基　　金：国家自然科学基金(32172662和31972498)。

摘　　要：为了筛选磷高效优异种质,研究油菜磷高效遗传,以甘蓝型油菜自然群体400个品种为试验材料,通过营养液培养方法进行了两轮苗期磷效率评估(分别命名为试验Ⅰ和试验Ⅱ)。该群体在低磷和正常磷处理下地上部干重、根系干重、根冠比、主根长和磷效率系数均呈现正态分布特征,品种间存在较大的基因型变异。以低磷处理地上部干重和磷效率系数为筛选指标,在试验Ⅰ中分别筛选出磷高效和低效候选品种各17份和13份,在试验Ⅱ中分别筛选出磷高效和低效候选品种各17份和18份。结合试验Ⅰ和Ⅱ,确定苗期磷高效候选品种32份,磷低效候选品种31份,可用以开展后续研究。Screening of phosphorus(P)-efficient germplasm of oilseed rape(Brassica napus L.) will provide elite materials for P heredity and P-efficient breeding. In this study, 400 varieties of natural population of oilseed rape(B. napus) was used to evaluate P efficiency at seedling stage under 2 experiments by hydroponic culture,named EXP. Ⅰ and EXP. Ⅱ, respectively. Under normal P and low P conditions, RDW(root dry weight), SDW(shoot dry weight), RSR(root : shoot ratio), PRL(primary root length) and PEC(phosphorus efficiency coefficient) of the natural population showed normal distribution, indicating that there existed abundant genetic variation in the natural population. P efficiency of the natural population of B. napus at the seedling stage was determined by the parameter of SDWLP and PEC. Among them, 17 P-efficient and 13 P-inefficient candidate varieties were obtained in EXP. Ⅰ, while 17 P-efficient and 18 P-inefficient candidate varieties were obtained in EXP. Ⅱ. Based on the 2 experiments, totally 32 P-efficient and 31 P-inefficient candidate varieties were identified for further work.

关 键 词：甘蓝型油菜 磷 磷效率 种质筛选 

分 类 号：S565.4[农业科学—作物学]