Genetic Control of Photoperiod Sensitivity in Maize Revealed by Joint Multiple Population Analysis
Genetic Control of Photoperiod Sensitivity in Maize Revealed by Joint Multiple Population Analysis
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DOI：
10.1534/genetics.109.110304
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发表时间：
2010-03-01
期刊：
影响因子：
3.3
通讯作者：
Holland, James B.
中科院分区：
文献类型：
--
作者：
Coles, Nathan D.;McMullen, Michael D.;Holland, James B.
玉米对光周期反应的变异与该物种的地理适应有关。玉米具有许多在其他物种中被鉴定为开花时间调节因子的基因的同源物，但它们与玉米光周期反应的自然变异的关系尚不清楚。候选基因序列进行了映射，在四个群体中创建两个温带自交系，两个光周期敏感的热带自交系杂交。全基因组扫描进行了高密度基因分型的人口，这是表型超过3年的短日照和长日照环境。联合多群体分析确定了基因组区域控制开花时间，株高和总叶片数的光周期反应。确定了控制整个种群光周期反应的四个关键基因组区域，称为ZmPR 1 -4。表型相似的创始人在这些地区的功能等位基因的差异表明不同的进化轨迹光周期适应玉米。这些区域包括候选基因CCA/LHY、CONZ 1、ZCN 2、ELF 4、GHD 7、VGT 1、HY 1/SE 5、T0 C1/PRR 7/PPD-1、PIF 3、ZCN 8和ZCN 19。
Variation in maize for response to photoperiod is related to geographical adaptation in the species. Maize possesses homologs of many genes identified as regulators of flowering time in other species, but their relation to the natural variation for photoperiod response in maize is unknown. Candidate gene sequences were mapped in four populations created by crossing two temperate inbred lines to two photoperiod-sensitive tropical inbreds. Whole-genome scans were conducted by high-density genotyping of the populations, which were phenotyped over 3 years in both short- and long-day environments. Joint multiple population analysis identified genomic regions controlling photoperiod responses in flowering time, plant height, and total leaf number. Four key genome regions controlling photoperiod response across populations were identified, referred to as ZmPR1-4. Functional allelic differences within these regions among phenotypically similar founders suggest distinct evolutionary trajectories for photoperiod adaptation in maize. These regions encompass candidate genes CCA/LHY, CONZ1, CRY2, ELF4, GHD7, VGT1, HY1/SE5, TOC1/PRR7/PPD-1, PIF3, ZCN8, and ZCN19.