Polynucleotides and polypeptides in plants

A method for producing a transgenic plant that has an improved trait relative to a control plant, the method steps comprising:

• (a) providing a recombinant construct encoding a polypeptide that comprises a conserved domain that is at least 87% identical to amino acids 65-137 of SEQ ID NO:
• 594;
• wherein the polypeptide is at least 79% identical over the entire length of SEQ ID NO:
• 594;
• and
• (b) introducing the recombinant construct into a target plant to produce a transgenic plant;
• wherein when the polypeptide is over-expressed in a plant, the polypeptide confers an improved trait that is selected from the group consisting of greater yield and greater tolerance to cold, relative to a control plant that does not comprise the recombinant construct.

A transgenic corn or maize plant that has greater yield than a control corn or maize plant, wherein the transgenic corn or maize plant comprises an expression vector or cassette comprising a recombinant polynucleotide that encodes a polypeptide;

• wherein the polypeptide comprises a conserved domain that is at least 87% identical to amino acids 65-137 of SEQ ID NO:
• 594, and wherein the polypeptide is at least 79% identical to SEQ ID NO:
• 594;
• wherein said control corn or maize plant does not comprise the expression vector or cassette;
• and
• wherein overexpression of the polypeptide in the transgenic corn or maize plant confers to the transgenic corn or maize plant greater yield.