Conservation of imprinted expression across genotypes is correlated with consistency of imprinting across endosperm development in maize

被引:0
作者
Higgins, Kaitlin [1 ]
Nyabashi, Vital [1 ]
Anderson, Sarah [1 ]
机构
[1] Iowa State Univ, Dept Genet Dev & Cell Biol, Mol Biol Bldg 1210,2437 Pammel Dr, Ames, IA 50010 USA
来源
G3-GENES GENOMES GENETICS | 2025年
关键词
maize; epigenetics; imprinting; endosperm; Plant Genetics and Genomics; EPIGENETIC ASYMMETRY; HISTONE METHYLATION; GENES; DNA; DEMETHYLATION; ACTIVATION; PLANTS;
D O I
10.1093/g3journal/jkaf028
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
Imprinted expression is an essential process for seed viability affecting hundreds of genes in Zea mays endosperm; however, most studies have examined just one time point for analysis. The focus on single time points can limit our ability to identify imprinted genes and our ability to draw conclusions for the role of imprinting in endosperm. In this study, we examine imprinted expression across 4 time points ranging from the transition to endoreduplication from mitotic division through the beginning of programmed cell death. Additionally, we assessed imprinting variation across 8 diverse maize lines, 6 of which have never before been assessed for imprinting. Through this analysis, we identify over 700 imprinted genes with varying consistency across time points including 255 genes imprinted at every time point and 105 genes displaying transient imprinting. We find a correlation between high consistency of imprinting across time and high conservation of parental bias across 8 diverse maize lines reciprocally crossed with B73. Additionally, we identify evidence of imprinting for 3 zein genes that are critical for nutrient accumulation in the endosperm, suggesting that imprinting may play a more important role in seed composition than previously thought. Taken together, this study provides a more holistic view of imprinting variation across time and across genotypes in maize and enables us to more thoroughly investigate the complex imprinting landscape.
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页数:11
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