Imprinting of R-r, paramutation of B-I and Pl, and epigenetic silencing of MuDR/Mu transposons in Zea mays L. are coordinately affected by inbred background.
Imprinting of R-r, paramutation of B-I and Pl, and epigenetic silencing of MuDR/Mu transposons in Zea mays L. are coordinately affected by inbred background.
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DOI：
10.1017/s0016672301005043
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发表时间：
2001-06
期刊：
影响因子：
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通讯作者：
Virginia Walbot
中科院分区：
文献类型：
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作者：
Virginia Walbot
在W23和A188玉米自交系中评估了R-r处的印记程度、B-Intense和Pl处的副突变频率以及Mu转座子的表观遗传沉默。所有类型的表观遗传现象影响这些位点的花青素途径更频繁地发生在W23自交系。在F1代杂种后代中，下调的缺失是显性的。相同的等位基因程序较低的花青素积累在A188比在W23，和A188植物比W23更快地发展。特定的遗传因素，内在的基因表达水平和/或生命周期的快速性调节表观遗传基因控制的可能性进行了讨论。
The extent of imprinting at R-r, frequency of paramutation at B-Intense and Pl, and epigenetic silencing of Mu transposons were evaluated in the W23 and A188 inbred lines of maize. All types of epigenetic phenomena affecting these loci of the anthocyanin pathway occurred more frequently in the W23 inbred line. Absence of down-regulation was dominant in F1 hybrid progeny. Identical alleles programme lower anthocyanin accumulation in A188 than in W23, and A188 plants develop more rapidly than W23. The possibilities that specific genetic factors, intrinsic gene expression levels and/or the rapidity of the life cycle modulate epigenetic gene controls are discussed.