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expand all sections collapse all sections  Zea mays subsp. mays Gene "kn1"
ID 65
Name kn1 (GENE SYMBOL)
Synonyms (5)
GRAMENE GENEGR:0200273
Type Gene
Species Zea mays subsp. mays (Maize) [ GR_tax:014546 ]
Germplasm
Description Dominant Kn1 plants have localized proliferation of tissue at vascular bundles
on leaf. Dominant Kn1, localized proliferation of tissue at vascular bundles on
leaf to give a knotted appearance. Homozygotes more extreme. Primary effect is
to lateral veins of leaf blades; veins are often more prominent, localized extra
cell divisions (knots) occur sporadically along the veins, ligule fringes are
found along the veins (Gelinas et al. 1969 Am J Bot 56:671). The phenotype is
not determined by the epidermis (Hake and Freeling 1986 Nature 320:621), but by
the inner middle mesophyll-bundle sheath layer (Sinha and Hake 1990 Dev Biol
Symp 19:77). The dominant mutation is neomorphic (Freeling and Hake 1985
Genetics 111:617). A number of alleles have been cloned (Hake et al. 1989 Embo J
8:15, Veit et al 1990 Genetics 125:623; Gelinas et al. 1969 Am J Bot 56:671).
Classification varies widely among alleles and according to genetic background.
(Hake). Shoot meristem and developing stem specific, not in young leaf primorida
or older leaves, not in primary or root meristem; although KN1 protein in all
meristem cell layers, mRNA not detected in tunica layer (Jackson et al 1994).
Homeobox. Genetic 2005 1 coordinates determined from these recombination and map
data: phyA1 -0.4- kn1 - umc106a; bnl8.10a tb1 phy1 kn1 adh1 bnl7.25a;
rz912a(phy) -1- kn1 -1- tua1; see MaizeGDB ID:136345; 61330; 934700. This gene
was originally curated in MaizeGDB Database and the map position was displayed
on the maize bins map if feasible.
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