Bif2 barren inflorescence2


''bif2 barren inflorescence2'' gene in [Maize]

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Function. Regulation of auxin transport during axillary Meristem and lateral organ initiation.
Summary The bif2 mutation affects all axillary meristems in the plant. The tassel has fewer branches, spikelets, florets and floral organs. The ear shoot, if it forms, has very few kernels. The mutant plants also have defects in vegetative development as they make fewer tillers and make one or two fewer leaves than normal. The bif2 gene encodes a serine threonine protein kinase that phosphorylates auxin efflux carrier ZmPIN1a and BHLH transcription factor BARREN STALK1. Natural variation in bif2 alleles are associated with tassel branch number and plant height.
First report. Briggs and Johal 1992
Chromosome Location Based on B-A chromosomal translocation data and tight linkage to the RFLP marker umc67a and the 2010 B73_v2 maize reference genome sequence assembly. Genetically mapped SNPs near the gene include rs131816257, rs131816315, and rs131816316.
Phenotypes Mutations in the gene produce plants where tassels, or male inflorescences have fewer branches, spikelets, florets and floral organs. The ear shoot or female inflorescence, if it forms, has very few kernels. Natural variations of the bif2 gene have been found to affect tassel branch number and plant height
Gene Product''' Serine/threonine protein kinase that phosphorylates the PIN1a and BA2 proteins in vitro.

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