【摘要】 磷是植物生长发育所必需的大量营养元素。植物磷营养高效利用通常与根的形态、根分泌物、膜与体内磷转运以及菌根等因素有关,表现为受多基因控制。本文通过前期筛选工作,获得1份耐低磷株系。利用230对SSR和InDel引物,对低磷材料所在的回交导入系群体进行了初步定位,定位结果显示,与磷利用效率相关的基因座位有两个OsPe5和OsPe7,分别位于第5染色体的InDel520与InDel529标记之间,与InDel525标记共分离,物理距离约为900kb,和第7染色体InDel703与InDel717标记之间,与InDel713标记共分离,物理距离约为1400kb。更多还原

【Abstract】 Phosphorus(P) was an essential macronutrient for plant growth and development.High-efficient utilization of P-nutrition in plant was closely related to many factors,such as root morphology,root exudates,P-transportors across plasmalemma,P-translocation and symbiosis with microorganisms and so on.These nutritional properties were genetically controlled by multi-genes and characterized by quantitative trait loci(QTLs).In this study,a line with tolerance to low P was selected based on the identification of previous work.Backcross introgression lines(BIL) population with low-phosphorus materials were used for preliminary mapping by using 230 pairs of SSR and InDel primers.The results showed that two loci were associated with P utilization efficiency and mapped between the markers of InDel520 and InDel529 on the chromosome 5 and InDel703 and InDel717 on the chromosome 7,respectively.The locus on the chromosome 5 was co-segregated with the InDel525,about 900 kb physical distance,wher eas the locus on the chromosome 7 was co-segregated with the InDel713,approximately 1 400 kb physical distance.更多还原