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1玉米产量性状的表观遗传调控机制和育种应用显示文摘作物表型的多样性受到多方面因素的影响,其中表观遗传变异可以通过表观修饰调控基因表达来控制作物性状及胁迫响应,进而影响农作物产量。影响玉米产量的主要农艺性状包括株高、叶夹角、根系等株型因素。此外,生物胁迫和非生物胁迫、种质资源也是影响玉米产量的关键因素。作物中主要的表观调控方式包括组蛋白修饰、DNA修饰、RNA修饰、非编码RNA及染色质重构。本综述重点总结了表观遗传修饰对玉米主要产量性状的调控机制及表观遗传变化在作物品种改良中的重要性,并结合表观遗传编辑技术提出了提高玉米产量的表观育种新途径。张道磊 甘雨军 乐亮 普莉 2023生物技术通报2023,39,8:1
2TaSRO1 interacts with TaVP1 to modulate seed dormancy and pre-harvest sprouting resistance in wheat显示文摘Dormancy is an adaptive trait which prevents seeds from germinating under unfavorable environmental conditions.Seeds with weak dormancy undergo pre-harvest sprouting(PHS)which decreases grain yield and quality.Understanding the genetic mechanisms that regulate seed dormancy and resistance to PHS is crucial for ensuring global food security.In this study,we illustrated the function and molecular mechanism of TaSRO1 in the regulation of seed dormancy and PHS resistance by suppressing TaVP1.The tasro1 mutants exhibited strong seed dormancy and enhanced resistance to PHS,whereas the mutants of tavp1 displayed weak dormancy.Genetic evidence has shown that TaVP1 is epistatic to TaSRO1.Biochemical evidence has shown that TaSRO1 interacts with TaVP1 and represses the transcriptional activation of the PHS resistance genes TaPHS1 and TaSdr.Furthermore,TaSRO1 undermines the synergistic activation of TaVP1 and TaABI5 in PHS resistance genes.Finally,we highlight the great potential of tasro1 alleles for breeding elite wheat cultivars that are resistant to PHS.Shupeng Liu Li Li Wenlong Wang Guangmin Xia Shuwei Liu 2024Journal of Integrative Plant Biology2024,66,1:0
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