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首页> 外文期刊>Journal of Experimental Botany >Dosage effect of the short arm of chromosome 1 of rye on root morphology and anatomy in bread wheat
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Dosage effect of the short arm of chromosome 1 of rye on root morphology and anatomy in bread wheat

机译：黑麦1号染色体短臂对面包小麦根形态和解剖的剂量效应。

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摘要

The spontaneous translocation of the short arm of chromosome 1 of rye (1RS) in bread wheat is associated with higher root biomass and grain yield. Recent studies have confirmed the presence of QTL for different root morphological traits on the 1RS arm in bread wheat. This study was conducted to address two questions in wheat root genetics. First, does the presence of the 1RS arm in bread wheat affect its root anatomy? Second, how does root morphology and anatomy of bread wheat respond to different dosages of 1RS? Near-isogenic plants with a different number (0 to 4 dosages) of 1RS translocations were studied for root morphology and anatomy. The F-1 hybrid, with single doses of the 1RS and 1AS arms, showed heterosis for root and shoot biomass. In other genotypes, with 0, 2, or 4 doses of 1RS, root biomass was incremental with the increase in the dosage of 1RS in bread wheat. This study also provided evidence of the presence of gene(s) influencing root xylem vessel number, size, and distribution in bread wheat. It was found that root vasculature follows a specific developmental pattern along the length of the tap root and 1RS dosage tends to affect the transitions differentially in different positions. This study indicated that the inherent differences in root morphology and anatomy of different 1RS lines may be advantageous compared to normal bread wheat to survive under stress conditions.
机译：面包小麦中黑麦（1RS）1号染色体短臂的自发转移与更高的根生物量和籽粒产量相关。最近的研究证实，面包小麦的1RS臂上存在不同根系形态特征的QTL。这项研究的目的是解决小麦根系遗传学中的两个问题。首先，面包小麦中1RS臂的存在是否会影响其根部解剖结构？其次，面包小麦的根系形态和解剖学对不同剂量的1RS有何反应？研究了具有不同数量（0至4个剂量）1RS易位的近等基因植物的根系形态和解剖结构。单次剂量的1RS和1AS臂的F-1杂种显示出根和茎生物量的杂种优势。在其他基因型中，在面包小麦中，0、2或4剂量的1RS，根生物量随着1RS剂量的增加而增加。该研究还提供了影响面包小麦根部木质部血管数量，大小和分布的基因的证据。发现根脉管系统沿着主根的长度遵循特定的发育模式，并且1RS剂量倾向于在不同位置差异影响过渡。这项研究表明，与普通面包小麦相比，不同1RS品系根系形态和解剖结构的内在差异可能在胁迫条件下存活更为有利。

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