摘要
本文利用由 98个家系组成的 Nipponbare/ Kasalath/ / Nipponbare回交重组自交系 (backcrossinbred lines,BIL s)作图群体 (BC1 F9)和混合线性模型的 QTL 定位方法 ,联合分析南京、合肥和海南 3个不同地点的水稻抽穗期 QTL 及QTL 与环境互作。检测到 8个抽穗期 QTL,分别位于第 1、 2、 3、 4、 6、 7、 8染色体上 ,其中 ,第 3染色体上有 2个QTL。单个 QTL 的加性效应大小范围为 1.46天～ 4.5 8天 ,对性状的贡献率在 1.49%～ 12 .2 %之间 ,加性效应总的贡献率为 34 .13%。有 6个 QTL 与环境存在显著互作 ,单个 QTL 与环境互作效应的贡献率在 2 .18%～ 15 .84%之间 ,互作效应总的贡献率为 41.11% ,大于加性效应的总贡献率。位于第 4、 6和 7染色体的 3个 QTL 在 3个不同地点均与环境存在显著互作 ,并且 ,在南京和合肥的互作效应均使抽穗期延长 ,在海南的互作都使抽穗期缩短 ,表现感光性特征。对抽穗期 QTL
Quantitative trait Locus (QTL) controlling heading date of rice across three environments was analyzed using 98 backcross inbred lines derived from a subspecific cross of Nipponbare/Kasalath//Nipponbare by mixed linear model approach. 8 QTL for heading date were mapped in the chromosomes of 1, 2, 3, 4, 6, 7 and 8 with 2 QTL in chromosome 3. The general contribution of additive QTL was 34.13%, the proportion of phenotypic variation explained by individual additive QTL ranged from 1.49% to 12.2%, and additive effects ranged from 1.46～4.58 days. 6 QTL were founded to be affected significantly by environments, the proportion of phenotypic variation explained by individual QTL×environment interaction ranged from 2.18%～15.84%, and the general contribution was 41.11% which was larger than that of additive QTL. 3 QTL in chromosome 4, 6 and 7 had significant interactions across all three environments, and the QTL×environment interaction in Nanjing and Hefei delayed the heading date and that in Hainan advanced the heading date, which implied that the 3 QTL were sensitive to photoperiod. The stability of heading date QTL detection was discussed.
出处
《作物学报》
CAS
CSCD
北大核心
2002年第6期771-776,共6页
Acta Agronomica Sinica
基金
农业部"948"项目 ( 2 0 10 0 2 A)
"教育部优秀骨干教师基金"资助
