摘要
以中优早8号×丰锦籼粳交组合衍生的水稻重组自交系的167个株系及其亲本为材料,在正常施氮和不施氮2种处理下对其每穗总粒数、穗长、单株有效穗、结实率、千粒重和单株产量6个产量相关性状进行比较分析和相关QTL定位,结果表明,在不施氮条件下每穗总粒数、穗长、单株有效穗和单株产量可作为水稻耐低氮材料的筛选指标;在2种氮处理下共定位到11个产量相关性状QTL,表型贡献率为3.84%～22.47%,其中2个QTL在2种氮水平下同时检测到。此外,还定位到2个氮肥农学利用效率QTL,表型贡献率分别为7.54%和6.67%。
Using an F9 population of 167 recombinant inbred lines（ RIL） of rice derived from the cross of Zhongyouzao 8（ an indica variety） and Toyonishiki（ a japonica variety） as well as its parents as the materials,the comparison and QTL mapping of six yield-related traits including spikelets per panicle（ SP）,panicle length（ PL）,effective panicles per plant（ EPP）,seed setting rate（ SSR）,1 000-grain weight（ KGW） and yield per plant（ YP）were conducted under two nitrogen levels of the normal N application treatment（ N） and the low nitrogen treatment without any N application（ N_）. The results showed that SP,PL,EPP and YP could be used as the indexes for selection of low N tolerant rice materials under no N application. Under two N levels,there were 11 yield-related QTLs detected in the RIL population,explaining 3. 84% ～ 22. 47% of phenotypic variation. Among them,two QTLs were detected under both of the N levels. Besides,two QTLs for nitrogen agronomic use efficiency were detected and they explained 7. 54% and 6. 67% of phenotypic variation,respectively.
出处
《杂交水稻》
CSCD
北大核心
2015年第2期50-56,共7页
Hybrid Rice
基金
国家"863"计划(2011AA10A101)
四川省财政基因工程项目(2011JYGC)
四川"十二五"水稻育种攻关计划(YZGG2011-1)
关键词
水稻
低氮胁迫
产量性状
氮肥农学利用效率
数量性状位点
定位
rice
low nitrogen stress
yield traits
nitrogen agronomic use efficiency
quantitative trait loci
gene mapping
