Abstract In rice breeding, ‘high yielding’ and ‘early maturing’ are negative-reciprocally regulated traits. A recent study identified a major maturity duration regulatory gene, Early flowering-completely dominant (Ef-cd), which encodes a long noncoding RNA. Ef-cd IncRNA overlaps with the antisense transcript of the OsSOC1 gene. Ef-cd positively regulates the expression of OsSOC1 and H3K36me3 deposition. Varieties and their derivatived hybrids harboring Ef-cd allele show 7-20 d early-maturation compared to their respective wild types at different latitudes, but without a concomitant yield penalty. Moreover, among 1 439 elite hybrid rice varieties, all of the hybrid cultivars with homozygous or heterozygous Ef-cd alleles mature significantly earlier. The mechanism of Ef-cd-promoted maturity without yield penalty is attributed to its facilitating nitrogen utilization and improving photosynthesis. Thus, Ef-cd may balance early maturating with stable grain yield, and can be used for molecular design breeding in rice. Keywords:rice;lncRNA;heading date;yield
PDF (684KB)摘要页面多维度评价相关文章导出EndNote|Ris|Bibtex收藏本文 引用本文 张硕, 吴昌银. 长链非编码RNA基因Ef-cd调控水稻早熟与稳产. 植物学报, 2019, 54(5): 550-553 doi:10.11983/CBB19163 Zhang Shuo, Wu Changyin. Long Noncoding RNA Ef-cd Promotes Maturity Without Yield Penalty in Rice. Chinese Bulletin of Botany, 2019, 54(5): 550-553 doi:10.11983/CBB19163
城市化导致耕地面积减少, 提高单位面积作物产量是保障粮食安全的有效途径(Crist et al., 2017; Bren et al., 2017)。人们利用双季稻和水稻(Oryza sativa)-小麦(Triticum aestivum)、水稻-油菜(Brassica campestris)等轮作模式提高土地利用率和单位面积的总产量。虽然矮化品种和杂交稻的推广应用大幅提高了水稻单季产量, 然而这类品种往往具有较长的生育期, 通过延长光合作用时间及提高碳素同化量来实现高产。生育期长的水稻品种难以应用于双季稻生产且影响后茬作物的种植。例如, 水稻第一次绿色革命的半矮化品种(如IR8、IR20、IR24和IR26)及20世纪70年代末使用的杂交稻品种(如汕优1号和汕优2号)虽然产量高, 但它们的生育期均偏长, 影响作物多季轮作(Virmani et al., 1982; Khush, 2001; Xie et al., 2015)。近年来, 水稻育种家通过选育早熟恢复系培育了一批适合双季种植的杂交稻品种, 并鉴定了调控水稻生育期的相关功能基因(Matsubara et al., 2014; Hori et al., 2015), 但生育期缩短又会导致水稻产量的降低。由此可见, 在水稻育种中早熟与高产性状的协调改良是困扰育种家的一大难题。
Ef-cd编码的lncRNA与OsSOC1基因的一段反义转录本重叠。 Ef-cd正调控OsSOC1基因的表达, 进而提高成花素基因Hd3a和RFT1的表达水平, 缩短水稻生育期。同时, Ef-cd通过提高氮素利用率及光合效率实现水稻的早熟与稳产。 Figure 1A proposed working model showing Ef-cd-promoted maturity without yield penalty in rice
Ef-cd (Early flowering-completely dominant) encodes a long noncoding RNA, which overlaps with the antisense transcript of the OsSOC1 gene. Ef-cd lncRNA positively regulates the expression of OsSOC1 and florigen genes Hd3a and RFT1. Ef-cd could promote rice flowering. On the other hand, Ef-cd could facilitate nitrogen utilization and improve photosynthesis. Thus, Ef-cd contributes to early maturating with stable grain yield.
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水稻完全显性早熟性的发现和基因定位 1 2001
... 早期的研究已将Ef-cd基因定位于第3号染色体的短臂上(邓晓建等, 2001; 董春林等, 2007).通过将Ef-cd区段导入6个水稻晚抽穗品种中, 发现在不同地理位置生长的近等基因系(NIL)均比其轮回亲本早熟, 且产量无明显下降.Fang等(2019)将早熟的D248近等基因系(NIL D248)与轮回亲本蜀恢881 (Shuhui881, SH881)杂交获得4 800株F2代群体, 将Ef-cd基因定位在12.9 kb的区间内, 此区段包含1个编码lncRNA的Os03g0122500和已发表的促进开花基因OsSOC1 (Lee et al., 2004; Bian et al., 2011).Os03g0122500的lncRNA与来自OsSOC1基因反义链的一段转录本重叠(Fang et al., 2019).比较NIL D248与SH881的序列, 发现Os03g0122500的启动子序列存在明显差异但编码区无差别.利用T-DNA插入突变体、CRISPR/Cas9编辑材料及RNAi材料, 证实Ef-cd为Os03g0122500基因, 而非OsSOC1 (Fang et al., 2019).将Os03g0122500启动子驱动荧光素酶基因瞬时表达, 结果表明NIL D248启动子驱动的荧光素酶基因有更强的表达. ...
水稻显性早熟基因Ef-cd的基因效应分析及育种应用潜力的初步评价 1 2007
... 早期的研究已将Ef-cd基因定位于第3号染色体的短臂上(邓晓建等, 2001; 董春林等, 2007).通过将Ef-cd区段导入6个水稻晚抽穗品种中, 发现在不同地理位置生长的近等基因系(NIL)均比其轮回亲本早熟, 且产量无明显下降.Fang等(2019)将早熟的D248近等基因系(NIL D248)与轮回亲本蜀恢881 (Shuhui881, SH881)杂交获得4 800株F2代群体, 将Ef-cd基因定位在12.9 kb的区间内, 此区段包含1个编码lncRNA的Os03g0122500和已发表的促进开花基因OsSOC1 (Lee et al., 2004; Bian et al., 2011).Os03g0122500的lncRNA与来自OsSOC1基因反义链的一段转录本重叠(Fang et al., 2019).比较NIL D248与SH881的序列, 发现Os03g0122500的启动子序列存在明显差异但编码区无差别.利用T-DNA插入突变体、CRISPR/Cas9编辑材料及RNAi材料, 证实Ef-cd为Os03g0122500基因, 而非OsSOC1 (Fang et al., 2019).将Os03g0122500启动子驱动荧光素酶基因瞬时表达, 结果表明NIL D248启动子驱动的荧光素酶基因有更强的表达. ...
Genetic architecture of variation in heading date among Asian rice accessions 1 2015
... 城市化导致耕地面积减少, 提高单位面积作物产量是保障粮食安全的有效途径(Crist et al., 2017; Bren et al., 2017).人们利用双季稻和水稻(Oryza sativa)-小麦(Triticum aestivum)、水稻-油菜(Brassica campestris)等轮作模式提高土地利用率和单位面积的总产量.虽然矮化品种和杂交稻的推广应用大幅提高了水稻单季产量, 然而这类品种往往具有较长的生育期, 通过延长光合作用时间及提高碳素同化量来实现高产.生育期长的水稻品种难以应用于双季稻生产且影响后茬作物的种植.例如, 水稻第一次绿色革命的半矮化品种(如IR8、IR20、IR24和IR26)及20世纪70年代末使用的杂交稻品种(如汕优1号和汕优2号)虽然产量高, 但它们的生育期均偏长, 影响作物多季轮作(Virmani et al., 1982; Khush, 2001; Xie et al., 2015).近年来, 水稻育种家通过选育早熟恢复系培育了一批适合双季种植的杂交稻品种, 并鉴定了调控水稻生育期的相关功能基因(Matsubara et al., 2014; Hori et al., 2015), 但生育期缩短又会导致水稻产量的降低.由此可见, 在水稻育种中早熟与高产性状的协调改良是困扰育种家的一大难题. ...
Rice improvement at IRRI: an example of international collaboration 1 2001
... 城市化导致耕地面积减少, 提高单位面积作物产量是保障粮食安全的有效途径(Crist et al., 2017; Bren et al., 2017).人们利用双季稻和水稻(Oryza sativa)-小麦(Triticum aestivum)、水稻-油菜(Brassica campestris)等轮作模式提高土地利用率和单位面积的总产量.虽然矮化品种和杂交稻的推广应用大幅提高了水稻单季产量, 然而这类品种往往具有较长的生育期, 通过延长光合作用时间及提高碳素同化量来实现高产.生育期长的水稻品种难以应用于双季稻生产且影响后茬作物的种植.例如, 水稻第一次绿色革命的半矮化品种(如IR8、IR20、IR24和IR26)及20世纪70年代末使用的杂交稻品种(如汕优1号和汕优2号)虽然产量高, 但它们的生育期均偏长, 影响作物多季轮作(Virmani et al., 1982; Khush, 2001; Xie et al., 2015).近年来, 水稻育种家通过选育早熟恢复系培育了一批适合双季种植的杂交稻品种, 并鉴定了调控水稻生育期的相关功能基因(Matsubara et al., 2014; Hori et al., 2015), 但生育期缩短又会导致水稻产量的降低.由此可见, 在水稻育种中早熟与高产性状的协调改良是困扰育种家的一大难题. ...
Functional analyses of the flowering time gene OsMADS50, the putative SUPPRESSOR OF OVEREXPRESSION OF CO 1/AGAMOUS-LIKE 20 (SOC1/AGL20) ortholog in rice 1 2004
... 早期的研究已将Ef-cd基因定位于第3号染色体的短臂上(邓晓建等, 2001; 董春林等, 2007).通过将Ef-cd区段导入6个水稻晚抽穗品种中, 发现在不同地理位置生长的近等基因系(NIL)均比其轮回亲本早熟, 且产量无明显下降.Fang等(2019)将早熟的D248近等基因系(NIL D248)与轮回亲本蜀恢881 (Shuhui881, SH881)杂交获得4 800株F2代群体, 将Ef-cd基因定位在12.9 kb的区间内, 此区段包含1个编码lncRNA的Os03g0122500和已发表的促进开花基因OsSOC1 (Lee et al., 2004; Bian et al., 2011).Os03g0122500的lncRNA与来自OsSOC1基因反义链的一段转录本重叠(Fang et al., 2019).比较NIL D248与SH881的序列, 发现Os03g0122500的启动子序列存在明显差异但编码区无差别.利用T-DNA插入突变体、CRISPR/Cas9编辑材料及RNAi材料, 证实Ef-cd为Os03g0122500基因, 而非OsSOC1 (Fang et al., 2019).将Os03g0122500启动子驱动荧光素酶基因瞬时表达, 结果表明NIL D248启动子驱动的荧光素酶基因有更强的表达. ...
Photosynthesis, grain yield, and nitrogen utilization in rice and wheat 1 2011