Natural variation at the DEP1 locus enhances grain yield in rice

Huang, Xianzhong; Qian, Qian; Liu, Zhengbin; Sun, Hongying; He, Suqin; Luo, Da; Xia, Guangmin; Chu, Chengcai; Li, Jiayang; Fu, Xiang‐Dong

doi:10.1038/ng.352

Cited by 907 publications

(860 citation statements)

References 21 publications

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“…And the increased diameter of both culm and panicle may help to enhance the potential in lodging and fertilizer resistance. Genetic studies of erect panicle varieties derived from Balilla and other mutants have identified panicle erectness genes, such as DEP1/qPE9-1, EP2, and EP3, in recent years [10][11][12][14][15][16]. Unlike dep1, the number of spikelets and primary and secondary branches was almost the same in dep2 compared to the wild type.…”

Section: Discussionmentioning

confidence: 99%

Rice DENSE AND ERECT PANICLE 2 is essential for determining panicle outgrowth and elongation

et al. 2010

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The architecture of the panicle, including grain size and panicle morphology, directly determines grain yield. Panicle erectness, which is selected for achieving ideal plant architecture in the northern part of China, has drawn increasing attention of rice breeders. Here, dense and erect panicle 2 (dep2) mutant, which shows a dense and erect panicle phenotype, was identified. DEP2 encodes a plant-specific protein without any known functional domain. Expression profiling of DEP2 revealed that it is highly expressed in young tissues, with most abundance in young panicles. Morphological and expression analysis indicated that mutation in DEP2 mainly affects the rapid elongation of rachis and primary and secondary branches, but does not impair the initiation or formation of panicle primordia. Further analysis suggests that decrease of panicle length in dep2 is caused by a defect in cell proliferation during the exponential elongation of panicle. Despite a more compact plant type in the dep2 mutant, no significant alteration in grain production was found between wild type and dep2 mutant. Therefore, the study of DEP2 not only strengthens our understanding of the molecular genetic basis of panicle architecture but also has important implications for rice breeding.

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Section: Discussionmentioning

confidence: 99%

Rice DENSE AND ERECT PANICLE 2 is essential for determining panicle outgrowth and elongation

et al. 2010

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“…The genetics of sink size (e.g., grain size and grain number) has been well analyzed in rice plants, and several QTLs controlling grain number per panicle and grain size have been identified (Ashikari et al 2005;Fan et al 2006;Song et al 2007;Shomura et al 2008;Huang et al 2009). On the other hand, genetic analyses of factors affecting source capacity, such as photosynthetic rate, have been limited, probably because of the need for time- C1006 G2009 C479 C383 G1068 C145 R646 R1440 R2394 R2677 R1245 C847 R1789 G379 C596 C924 C213 8 R1943 G278 C277 C1121 C1107 G104 C347 R1394A G1073 S10622 G187 R2382 R202 S14074 G1149 R2662 R1963 9 C711 G36 R1164 R1751 G385 R2272 S1057 C609 C1263 C570 C506 G1445 10 C701 S2083 R2174 C148 R1629 C1166 R2447 R3285 C1286 R1877 R844 G2155 R716 C16 C809 C405 11 G24A R77 R3202 C794A S1057 C410 C477 G320B G320A C535 G44 C3 R728 G257 C1172 S723 C50 G1465 C82 C950 G181 12 G24B R1957 C1336 R2672A R367 R3375 R...…”

Section: Discussionmentioning

confidence: 99%

A Quantitative Trait Locus for Chlorophyll Content and its Association with Leaf Photosynthesis in Rice

Takai

Kondo

Yano

et al. 2010

Rice

118

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Leaf photosynthesis, an important determinant of yield potential in rice, can be estimated from measurements of chlorophyll content. We searched for quantitative trait loci (QTLs) for Soil and Plant Analyzer Development (SPAD) value, an index of leaf chlorophyll content, and assessed their association with leaf photosynthesis. QTL analysis derived from a cross between japonica cultivar Sasanishiki and high-yielding indica cultivar Habataki detected a QTL for SPAD value on chromosome 4. This QTL explained 31% of the total phenotypic variance, and the Habataki allele increased the SPAD value. Chromosomal segment substitution line (CSSL) with the corresponding segment from Habataki had a higher leaf photosynthetic rate and SPAD value than Sasanishiki, suggesting an association between SPAD value and leaf photosynthesis. The CSSL also had a lower specific leaf area (SLA) than Sasanishiki, reflecting its thicker leaves. Substitution mapping under Sasanishiki genetic background demonstrated that QTLs for SPAD value and SLA were co-localized in the 1,798-kb interval. The results suggest that the phenotypes for SPAD value and SLA are controlled by a single locus or two tightly linked loci, and may play an important role in increasing leaf photosynthesis by increasing chlorophyll content or leaf thickness, or both.

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“…Central to this variation are unique branching patterns that contribute directly to traits such as grain yield, harvestability, and hybrid seed production (Kellogg 2007;Huang et al 2009;Sreenivasulu and Schnurbusch 2012;Ishii et al 2013). Among grasses, inflorescence architecture is diverse, yet characterized by a unique morphology, where flowers are borne on specialized short branches called spikelets (Kellogg 2007;Thompson and Hake 2009).…”

Section: [Supplemental Materials Is Available For This Article]mentioning

confidence: 99%

Regulatory modules controlling maize inflorescence architecture

et al. 2013

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Genetic control of branching is a primary determinant of yield, regulating seed number and harvesting ability, yet little is known about the molecular networks that shape grain-bearing inflorescences of cereal crops. Here, we used the maize (Zea mays) inflorescence to investigate gene networks that modulate determinacy, specifically the decision to allow branch growth. We characterized developmental transitions by associating spatiotemporal expression profiles with morphological changes resulting from genetic perturbations that disrupt steps in a pathway controlling branching. Developmental dynamics of genes targeted in vivo by the transcription factor RAMOSA1, a key regulator of determinacy, revealed potential mechanisms for repressing branches in distinct stem cell populations, including interactions with KNOTTED1, a master regulator of stem cell maintenance. Our results uncover discrete developmental modules that function in determining grass-specific morphology and provide a basis for targeted crop improvement and translation to other cereal crops with comparable inflorescence architectures.

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Natural variation at the DEP1 locus enhances grain yield in rice

Cited by 907 publications

References 21 publications

Rice DENSE AND ERECT PANICLE 2 is essential for determining panicle outgrowth and elongation

Rice DENSE AND ERECT PANICLE 2 is essential for determining panicle outgrowth and elongation

A Quantitative Trait Locus for Chlorophyll Content and its Association with Leaf Photosynthesis in Rice

Regulatory modules controlling maize inflorescence architecture

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