Developmental responses to vernalization in wheat deletion lines for chromosomes 5A and 5D
Developmental responses to vernalization in wheat deletion lines for chromosomes 5A and 5D
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小麦 5A 和 5D 染色体缺失系对春化的发育反应
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
J. Snape
中科院分区：
文献类型：
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作者：
E. Whitechurch;J. Snape
本研究的目的是检测“中国春”（CS）染色体臂5AL和5DL在春化和非春化处理下产生的缺失系的发育模式。植物在饱和日照的受控条件下生长。记录了抽穗时间和开花前特定阶段的持续时间，并分析了叶片和小穗的产量和数量。在非春化条件下，缺乏Vrn-A1和Vrn-D1的品系，由于出苗期到花形成期（EM-FI）和末穗期到抽穗期（TS-H）的延长，导致抽穗时间延迟。末叶数的差异与EM-FI期持续时间的延长相对应。Vrn-A1和Vrn-D1的缺失明显减少了小穗数量，降低了原基产量，尽管FI-TS期的持续时间比CS更长或相同。删除Vrn基因的品系对春化的敏感性要高得多。
The aim of this investigation was to test the developmental patterns of deletion lines, generated for chromosome arms 5AL and 5DL in the variety ‘Chinese Spring’ (CS) under vernalized and non-vernalized treatments. Plants were grown in controlled conditions under saturating daylength. Time to heading and the duration of particular phases before flowering were recorded, and leaf and spikelet production rates and numbers were analysed. The lines lacking Vrn-A1 and Vrn-D1 were delayed in time to heading under non-vernalized conditions, because of the lengthening of the emergence to floral initiation phase (EM-FI) and the terminal spikelet to heading phase (TS-H). Differences in final leaf numbers corresponded to longer durations of the EM-FI phase. The absence of Vrn-A1 and Vrn-D1 apparently decreased the number of spikelets by a lower primordium production rate, even though the duration of the FI-TS phase was longer or equal to CS. The sensitivity to vernalization in lines where the Vrn genes were deleted was much higher.