From Bikram Gill, 12/92
ANEUPLOIDS INVOLVING ONE CHROMOSOME/According to Kimber/Sears
Nullisomic a plant with 20 homologous bivalents or a plant deficient for
one chromosome pair.
Symbol: 20"
Somatic chromosome number: 40
Monosomic a plant with 20 homologous bivalents and one univalent for a
complete chromosome.
Symbol: 20"+1
Somatic chromosome number: 41
Disomic a plant with the euploid chromosome complement of Triticum
aestivum present as 42 complete chromosomes.
Symbol: 21"
Somatic chromosome number: 42
Trisomic a plant with one complete chromosome represented three times.
Symbol: 20"+1"
Somatic chromosome number: 43
Tetrasomic a plant with one complete chromosome represented four times.
Symbol: 20"+1""
Somatic chromosome number: 44
Monotelosomic a plant with one chromosome represented by a telocentric
misdivision product for one complete chromosome arm.
Symbol: 20"+1
Somatic chromosome number: 41
Ditelosomic a plant with one chromosome represented by a homologous pair of
telocentric chromosomes
Symbol: 20"+1"
Somatic chromosome number: 42
Tritelosomic a plant with one chromosome represented by three homologous
telocentric chromosomes
Symbol: 20:+1"
Somatic chromosome number: 43
Monotelodisomic
a plant with one chromosome represented by a bivalent
consisting of a complete and a telocentric chromosome. This
type of bivalent is often referred to as a heteromorphic
bivalent.
Symbol: 20"+1"
Somatic chromosome number: 42
Monotelotrisomic
a plant with one chromosome represented by a trivalent
consisting of two complete chromosomes and one telocentric
chromosome.
Symbol: 20"+t2"
Somatic chromosome number: 43
Ditelotrisomic
a plant with one chromosome represented by a trivalent
consisting of two homologous telocentric chromosomes and one
complete chromosome.
Symbol: 20"+(t")1"
Somatic chromosome number: 43
Monoisosomic a plant with one chromosome represented by an isochromosome
misdivision product for one complete arm.
Symbol: 20"+i
Somatic chromosome number: 41
Di-isosomic a plant with one chromosome represented by a homologous pair of
isochromosomes.
Symbol: 20"+i"
Somatic chromosome number: 42
Tri-isosomic a plant with one chromosome represented by three homologous
isochromosomes.
Symbol: 20"+i"
Somatic chromosome number: 43
Monoisodisomic
a plant with one chromosome represented by a bivalent
consisting of a complete chromosome and an isochromosome.
Symbol: 20"+i1"
Somatic chromosome number: 42
Monoisotrisomic
a plant with one chromosome represented by a trivalent
consisting of two complete chromosome and one isochromosome.
Symbol: 20"+i2"
Somatic chromosome number: 43
Di-isotrisomic a plant with one chromosome represented by a trivalent
consisting of two homologous isochromosomes and one complete
chromosome.
Symbol: 20"+(i")1"
Somatic chromosome number: 43
Teloisodisomic
a plant with one chromosome represented by a telocentric
chromosome and its homologous isochromosome.
Symbol: 20"+ti"
Somatic chromosome number: 42
Monotelomonoisosomic
a plant with one chromosome represented by a telocentric
chromosome for one arm and an isochromosome of the other,
non-homoeologous arm.
Symbol: 20"+t +i
Somatic chromosome number: 42
Doublemonotelosomic
a plant with one chromosome represented by a telocentric
chromosome for each arm.
Symbol: 20"+t +t
Somatic chromosome number: 42
Ditelo-monotelosomic
a plant with one chromosome represented by a pair of telocentric
chromosomes for one arm and an unpaired telocentric chromosome
for the other, non-homologous, arm.
Symbol: 20"+t"+t
Somatic chromosome number: 43
Doubletelotrisomic
a plant with one chromosome represented by a trivalent
consisting of a complete chromosome and two telocentric
chromosomes, one for each arm of the complete chromosome.
Symbol: 20"+(t+t)1"
Somatic chromosome number: 43
Doublemonoisosomic
a plant with one chromosome represented by two isochromosomes,
one for each arm.
Symbol: 20"+i +i
Somatic chromosome number: 42
Doubleisotrisomic
a plant with one chromosome represented by a trivalent
consisting of a complete chromosome and two isochromosomes,
one for each arm of the complete chromosome.
Symbol: 20"+(i+i)1"
Somatic chromosome number: 43
Teloisotrisomic
a plant with one chromosome represented as a trivalent
consisting of a complete chromosome, and isochromosome, and a
telocentric chromosome for the same arm as the isochromosome.
Symbol: 20"+(ti)1"
Somatic chromosome number: 43
Monotelo-monoisotrisomic
a plant with one chromosome represented as a trivalent
consisting of a complete chromosome, an isochromosome, and a
telocentric chromosome for the other, non-homologous arm.
Symbol: 20"+(t+i)1"
Somatic chromosome number: 43
Ditelo-monoisosomic
a plant with one chromosome represented by a pair of telocentric
chromosome for one arm and an unpaired isochromosome for the
other, non-homologous arm.
Symbol: 20"+t"+i
Somatic chromosome number: 43
Double ditelosomic
a plant with the euploid chromosome complement of Triticum
aestivum with one chromosome represented by a pair of
telocentric chromosomes for each arm.
Symbol: 20"+t"+t"
Somatic chromosome number: 44
ANEUPLOIDS INVOLVING MORE THAN ONE CHROMOSOME
Compensating nullisomic-tetrasomics
a plant that is nullisomic for one chromosome and tetrasomic
for a chromosome belonging to the same homoeologous group.
Symbol: 19"+1""
Somatic chromosome number: 42
Compensating monosomic-tetrasomics
a plant that is monosomic for one chromosome and tetrasomic
for a chromosome belonging to the same homoeologous group.
Symbol: 19"+1""+1
Somatic chromosome number: 43
Compensating nullisomic-trisomics
a plant that is nullisomic for one chromosome and trisomic for a
chromosome belonging to the same homoeologous group.
Symbol: 19"+1"
Somatic chromosome number: 41
Double monosomics
a plant that is monosomic for two non-homologous chromosomes.
Symbol: 19"+1 +1
Somatic chromosome number: 40
ANEUPLOIDS INVOLVING ONE TRITICUM AESTIVUM CHROMOSOME AND ONE
CHROMOSOME FROM A DONOR SPECIES
Chromosome addition
a plant that has one chromosome/chromosome arm or one pair of
chromosomes/chromosome arms from a related species added to the
euploid chromosome complement of Triticum aestivum.
Symbols:
monosomic addition 21"+1"
monotelosomic addition 21"+t
Somatic chromosome number: 43
disomic addition 21"+1"
ditelosomic addition 21+t"
Somatic chromosome number: 44
Chromosome substitution
plant that is monosomic or nullisomic for one triticum aestivum
chromosome/chromosome arm and has one chromosome/chromosome arm
or one pair of chromosomes/chromosome arms from a different
variety of Triticum aestivum or from a related species.
Symbols:
monosomic substitution 20"+1 +1
monotelosomic substitution 20"+1 +t
disomic substitution 20"+1"
ditelosomic substitution 20+t"
Somatic chromosome number: 42