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Tetrad Analysis Possible in Arabidopsis with Mutation of the QUARTET ( QRT ) Genes

1994; American Association for the Advancement of Science; Volume: 264; Issue: 5164 Linguagem: Inglês

10.1126/science.8197459

1095-9203

Daphne Preuss, Seung Y. Rhee, Ronald W. Davis,

Plant Molecular Biology Research

Two Arabidopsis thaliana genes, QRT1 and QRT2 , are required for pollen separation during normal development. In qrt mutants, the outer walls of the four meiotic products of the pollen mother cell are fused, and pollen grains are released in tetrads. Pollen is viable and fertile, and the cytoplasmic pollen contents are discrete. Pollination with a single tetrad usually yields four seeds, and genetic analysis confirmed that marker loci segregate in a 2:2 ratio within these tetrads. These mutations allow tetrad analysis to be performed in Arabidopsis and define steps in pollen cell wall development.