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Developmental impact on trans ‐acting dosage effects in maize aneuploids
Author(s) -
Cooper Jennifer L.,
Birchler James A.
Publication year - 2001
Publication title -
genesis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.093
H-Index - 110
eISSN - 1526-968X
pISSN - 1526-954X
DOI - 10.1002/gene.10006
Subject(s) - aneuploidy , biology , endosperm , gene dosage , chromosome , embryo , gene expression , gene , rna , andrology , genetics , medicine
Summary: The reduction in vigor or viability caused by aneuploidy may be the result of trans ‐acting dosage effects that reduce gene expression. To investigate the molecular and developmental parameters of aneuploid syndromes, the expression of sucrose synthase1 (sus1) and shrunken1 (sh1) was studied in 2‐week‐old plants. Expression of sus1 and sh1 was first investigated in euploids, where it was found that both transcripts varied in a diurnal fashion. Chromosome arm number can be varied in a series from one to three doses in maize. In the 14 aneuploid dosage series examined, most caused changes in sus1 and sh1 RNA levels that were both gene and tissue specific. Results were compared to previous data from embryo and endosperm tissue. More dosage effects were detected and the magnitude of RNA level modulation was greater in 2‐week‐old plant tissue. These findings suggest that the molecular consequences of aneuploidy might become more severe as development progresses. genesis 31:64–71, 2001. © 2001 Wiley‐Liss, Inc.