Identification of genomic regions determining the phenological development leading to floral transition in wheat (Triticum aestivum L.).
Identification of genomic regions determining the phenological development leading to floral transition in wheat (Triticum aestivum L.).
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鉴定基因组区域确定物候发育导致小麦的花卉过渡（Triticum aestivum L.）。
DOI：
10.1093/jxb/erp199
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发表时间：
2009
影响因子：
6.9
通讯作者：
Chibbar RN
中科院分区：
文献类型：
--
作者：
Båga M;Fowler DB;Chibbar RN
秋季播种的冬季谷物获得对冷冻温度的耐受性，并通过暴露于低温（LT）而春化。累积LT耐受性的水平取决于冷驯化率和控制茎尖分生组织的花转变时间的因素。本研究对冬小麦（T。aestivum L.）双单倍体（DH）作图群体分离LT耐受性和物候发育速率。最终的叶数（FLN），天FLN，开花天数测定142 DH系生长和不春化在受控环境中。通过复合区间作图（CIM）分析性状数据，确定了11个基因组区域，携带数量性状位点（QTL）的发育性状研究。CIM分析表明，春化和非春化植株的花转变时间均受染色体1B、2A、2B、6A和7A上的QTL控制。在4A染色体上发现的一个QTL只影响春化植株的花转变时间。耐LT的亲本Norstar的等位基因在除2A位点外的所有QTL上都延迟了开花转变。一些延迟花转变的QTL等位基因也增加了营养生长的长度和延迟开花时间。本研究中发现的QTL的基因编码的冷哈代冬小麦的区域适应性的因素。
Autumn-seeded winter cereals acquire tolerance to freezing temperatures and become vernalized by exposure to low temperature (LT). The level of accumulated LT tolerance depends on the cold acclimation rate and factors controlling timing of floral transition at the shoot apical meristem. In this study, genomic loci controlling the floral transition time were mapped in a winter wheat (T. aestivum L.) doubled haploid (DH) mapping population segregating for LT tolerance and rate of phenological development. The final leaf number (FLN), days to FLN, and days to anthesis were determined for 142 DH lines grown with and without vernalization in controlled environments. Analysis of trait data by composite interval mapping (CIM) identified 11 genomic regions that carried quantitative trait loci (QTLs) for the developmental traits studied. CIM analysis showed that the time for floral transition in both vernalized and non-vernalized plants was controlled by common QTL regions on chromosomes 1B, 2A, 2B, 6A and 7A. A QTL identified on chromosome 4A influenced floral transition time only in vernalized plants. Alleles of the LT-tolerant parent, Norstar, delayed floral transition at all QTLs except at the 2A locus. Some of the QTL alleles delaying floral transition also increased the length of vegetative growth and delayed flowering time. The genes underlying the QTLs identified in this study encode factors involved in regional adaptation of cold hardy winter wheat.
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影响因子：
2.3
作者：
Fowler, D. Brian
通讯作者：
Fowler, D. Brian
影响因子：
2.3
作者：
BRULEBABEL, AL;FOWLER, DB
通讯作者：
FOWLER, DB
影响因子：
1.2
作者：
Fowler, DB;Limin, AE;Ward, RW
通讯作者：
Ward, RW
影响因子：
7.4
作者：
Kane, NA;Danyluk, J;Sarhan, F
通讯作者：
Sarhan, F
影响因子：
4.2
作者：
Limin, AE;Fowler, DB
通讯作者：
Fowler, DB