Mapping QTLs for Heat Tolerance and Correlation between Heat Tolerance and Photosynthetic Rate in Rice
Mapping QTLs for Heat Tolerance and Correlation between Heat Tolerance and Photosynthetic Rate in Rice
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发表时间：
2003
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通讯作者：
Cao Liyong
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作者：
Cao Liyong
以双单倍体(双单倍体)群体为材料，在大田和温室条件下对水稻耐热性的数量性状座位(QTL)及其加性×加性上位性(AA)进行了检测。以109个DH系的结实率为耐热性指标。利用所构建的分子连锁图谱和QTLmapper 1.0软件进行QTL分析。在第1、3、4、8、11号染色体上分别检测到6个加性效应QTL。在第1、2、3、4、5、7、8和11号染色体上检测到8对上位性QTL，其解释方差为2.27%~8.13%。结果表明，抽穗期的光合速率与耐热性呈极显著正相关。
A double haploid (DH) population derived from a cross between Azucena (japonica) and IR64 (indica), was used for detecting additive effect(A) of quantitative trait loci(QTL) and their additive×additive epistasis(AA) for rice heat tolerance under field and greenhouse experiments. Seed setting rate of 109 DH lines was scored as the parameter of heat tolerance. QTL analysis was conducted by using the constructed molecular linkage map and software QTLmapper 1.0. Six additive effect QTLs were detected on chromosome 1,3,4,8 and 11, respectively. Eight pairs of epistasis effects QTLs were detected on chromosome 1,2,3,4,5,7,8 and 11 with variance explained being 2.27%-8.13%. Photosynthetic rate and heat tolerance were measured at maximum tillering and heading stage, and results showed that photosynthetic rate at heading stage was significantly positive correlated with heat tolerance.