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首页> 外文期刊>Journal of Experimental Botany >The chromosome region including the earliness per se locus Eps-Am1 affects the duration of early developmental phases and spikelet number in diploid wheat.
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The chromosome region including the earliness per se locus Eps-Am1 affects the duration of early developmental phases and spikelet number in diploid wheat.

机译：染色体区域包括本身的早期位点Eps-Am1影响二倍体小麦的早期发育阶段的持续时间和小穗数。

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摘要

Earliness per se genes are those that regulate flowering time independently of vernalization and photoperiod, and are important for the fine tuning of flowering time and for the wide adaptation of wheat to different environments. The earliness per se locus Eps-Am1 was recently mapped within a 0.8 cM interval on chromosome 1AmL of diploid wheat Triticum monococcum L., and it was shown that its effect was modulated by temperature. In this study, this precise mapping information was used to characterize the effect of the Eps-Am1 region on both duration of different developmental phases and spikelet number. Near isogenic lines (NILs) carrying the Eps-Am1-l allele from the cultivated accession DV92 had significantly longer vegetative and spike development phases (P <0.0001) than NILs carrying the Eps-Am1-e allele from the wild accession G3116. These differences were paralleled by a significant increase in the number of spikelets per spike, in both greenhouse and field experiments (P <0.0001). Significant interactions between temperature and Eps-Am1 alleles were detected for heading time (P <0.0001) but not for spikelet number (P=0.67). Experiments using NILs homozygous for chromosomes with recombination events within the 0.8 cM Eps-Am1 region showed that the differences in number of spikelets per spike were linked to the differences in heading time controlled by the Eps-Am1 locus. These results indicate that the differences in these two traits are either pleiotropic effects of a single gene or the effect of closely linked genes. A similar effect on spikelet number was detected in the distal region of chromosome 1AL in common wheat (T. aestivum L.).
机译：早发本身的基因是独立于春化和光周期调节开花时间的基因，对于微调开花时间和使小麦广泛适应不同环境具有重要意义。最近，将本身的早疫病位点Eps-Am1定位在二倍体小麦Triticum monococcum L.的1AmL染色体上的0.8 cM区间内，并显示其作用受温度调节。在这项研究中，此精确的映射信息用于表征Eps-Am1区域对不同发育阶段的持续时间和小穗数目的影响。携带来自栽培种DV92的Eps-Am1-1等位基因的近等基因系（NIL）的营养和穗发育阶段（P <0.0001）比来自野生种G3116的NIL显着更长。在温室和田间试验中，这些差异与每个穗的小穗数量显着增加平行（P <0.0001）。在抽穗时间（P <0.0001）中检测到温度与Eps-Am1等位基因之间的显着相互作用，而在小穗数方面未检测到（P = 0.67）。使用纯合子在0.8 cM Eps-Am1区域内发生重组事件的染色体进行纯合的实验表明，每个尖峰的小穗数量差异与Eps-Am1基因座控制的抽穗时间差异有关。这些结果表明这两个性状的差异是单个基因的多效性作用或紧密连锁的基因的作用。在普通小麦（T. aestivum L.）中，在1AL号染色体的远端区域也发现了对小穗数的类似影响。

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