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Genes controlling photoperiod sensitivity in maize and sorghum and uses thereof

A photoperiod, sensitive technology, applied in genetic engineering, plant genetic improvement, applications, etc., can solve problems such as undetected

Inactive Publication Date: 2015-08-26
PIONEER HI BRED INT INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In tropical lines, ZmCCT10 is highly expressed in a diurnal manner under non-inducible long-day conditions, but no expression of this gene was detected under inducible short-day conditions

Method used

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  • Genes controlling photoperiod sensitivity in maize and sorghum and uses thereof
  • Genes controlling photoperiod sensitivity in maize and sorghum and uses thereof
  • Genes controlling photoperiod sensitivity in maize and sorghum and uses thereof

Examples

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Effect test

example 1

[0261] Example 1: Identification and cloning of maize photoperiod regulator ZmCCT10 gene

[0262] Current genetic research on photoperiod sensitivity in maize is based on QTL (quantitative trait loci) mapping of flowering time. Four major photoperiod-sensitive loci were identified (Genetics (2010) 184:799-812 ("Genetics", 2010, Vol. 184, pp. 799-812)), and the major QTLs were mapped to Chromosome 10 (Genetics 183: 1555-1563 (Vol. 183, pp. 1555-1563)). The QTL on chromosome 10 was mapped to the CCT domain gene (Proc Natl Acad Sci USA (2012) 109 (28) ("Proceedings of the National Academy of Sciences of the United States of America", 2012, Vol. 109, No. 28)). The CCT domain (representing the three underlying gene C ONSTANS, C ONSTANS-LIKE, T OCl) is a carboxy-terminal approximately 45 amino acid peptide rich in basic residues and contains a putative nuclear localization signal (Science (2000) 289(5480): 768-71 ("Science", 2000, Vol. 289 , Issue 5480, pp. 768-771))....

example 2

[0264] Example 2: Identification and Cloning of Sorghum Photoperiod Regulators SbCCT1 and SbCCT6 Genes

[0265] Sorghum is a short-day plant native to northern Africa. Similar to maize, sorghum is photoperiod sensitive and is widely cultivated in tropical and subtropical regions. To identify sorghum CCT homologous genes, "Sorghum predicted coding sequence (JGI, Joint Genome Institute v.1.4) (N)" has been searched by BLAST using ZmCCT10 and rice Ghd7 coding nucleotide and amino acid sequences as query items. Rice Ghd7 (representing grain number, plant height and heading date 7) is a CCT gene used as a major negative regulator of flowering time under non-permissive long-day conditions (Itoh, et al., (2010) Nat Genet.42 (7):635-8 (Itoh et al., 2010, Nature Genetics, Vol. 42, No. 7, pp. 635-638)). Two predicted coding DNA sequences have been found, Sb06g000570.1 and Sb01g029080.1, located on chromosome 6 and chromosome 1, respectively. These genes were named SbCCT1 and Sb...

example 3

[0266] Example 3: Phylogenetic analysis and functional domains of ZmCCT10 predicted polypeptides

[0267] The CCT (stands for CONSTANS, CO-like and TOCl) domain is a highly conserved basic module of approximately 43 amino acids found near the C-terminus of plant proteins commonly involved in light signal transduction. This basal protein is encoded by the Arabidopsis CONSTANS gene, which controls flowering time by linking the circadian clock to downstream flowering genes (Suarez-Lopez, et al., (2001) Nature 410:1116-1120 (Suarez-Lopez, et al., (2001) Nature 410:1116-1120 (Suarez-Lopez, et al., -Lopez et al., 2001, Nature, Vol. 410, pp. 1116-1120)).

[0268] To elucidate the phylogenetic relationship of ZmCCT10 proteins with other CONSTANS and CO-like plant proteins, 54 proteins were selected from different plant species including Arabidopsis, rice, maize and sorghum. A phylogenetic consensus tree was constructed with 1000.00 tree bootstrapping values. ZmCCT10 protein...

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Abstract

The present disclosure provides polynucleotide sequences controlling the photoperiod sensitive trait in maize. The disclosure provides polynucleotide sequences and the use of encoded polypeptides associated with the photoperiod sensitivity. The disclosed sequences are responsible for controlling plant growth, source-sink relationships and yield in crop plants.

Description

technical field [0001] The present invention relates generally to plant molecular biology. More specifically, the invention relates to nucleic acids, and methods of modulating expression of said nucleic acids, thereby controlling photoperiod sensitivity, flowering time, and flower / seed production in plants. Background technique [0002] Flowering time is an important agronomic trait as it determines adaptation to the growing zone. Most plant species are induced to flower in response to environmental stimuli such as day length and temperature. Maize was domesticated in Mexico from its wild ancestor teosinte (Zea mays ssp. parviglumis), which requires short days for flowering. Modern agronomically important temperate maize is a sun-neutral plant because its photoperiod sensitivity has been lost during human artificial selection for the adaptation of maize to northern latitudes with long summer days. Tropical lines of maize still retain their short-day requirements for flowe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/04C12N15/82C07K14/415
CPCC12N15/827C07K14/415C12N15/8222C12N15/8273C12N15/8279C12N15/8286C12Q1/6895C12Q2600/13C12Q2600/156
Inventor N.D.科勒斯O.N.达尼勒维斯卡亚X.孟
Owner PIONEER HI BRED INT INC
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