摘要
利用主基因-多基因混合遗传模型,对由韭菜青×IR26杂交和自交构建的一个由220个家系组成的重组自交系群体(F8)的苗期吸氮能力和氮素生理利用率进行了遗传分析。水稻苗期硝态氮吸收能力、铵态氮吸收能力和氮素生理利用率均由两对主基因+多基因模式控制。硝态氮吸收能力的主基因遗传率为63.20%,多基因遗传率为20.64%,两对主基因之间有加性和上位性效应;铵态氮吸收能力的主基因遗传率为55.67%,多基因遗传率为0.03%,两对主基因之间具有显性上位性效应;氮素生理利用率的主基因遗传率仅为19.47%,多基因遗传率达67.46%,两对基因之间具有重叠效应。对水稻氮高效利用品种的选育策略进行了讨论。
A RILs population consisting of 220 lines (Fs) derived from the cross between rice variety Jiucaiqing (japonica) and IR26 (indica) was evaluated to analyze inheritance of nitrogen-absorbing (NA) ability and physiological use efficiency (NUE) at the seedling stage by using the major gene plus polygene mixed inheritance model. The NO3^- absorbency, NH4^+ absorbency and NUE of rice seedlings were genetically controlled by genetic mode of two major genes plus polygenes. The heritability values of major genes for NO3^- absorbency, NH4^+ absorbency and NUE were 63.20%, 55.67% and 19.47%, respectively, and the values of polygene for the three traits were 20.64 %, 0.03 % and 67.46 %. There were additive and epistasis effects for the NO3^- absorbency, epistasis effect for the NH4^+ absorbency and cumulative effect for the NUE respectively between each two major genes. The strategy to breed new rice variety with high absorbing ability and use efficiency of nitrogen was discussed.
出处
《中国水稻科学》
CAS
CSCD
北大核心
2006年第4期379-383,共5页
Chinese Journal of Rice Science
基金
国家自然科学基金重大项目(30291900)
长江学者创新团队发展计划资助项目
关键词
水稻
重组自交系
氮素
吸收效率
利用效率
遗传
rice
recombinant inbred line
nitrogen
absorbing ability
use efficiency
inheritance