Evolution of wheat

1. Submitted by
R.P .MAURYA
M. SC. (Ag),
Department of Genetics &
Plant Breeding,
Chaudhary Charan Singh
University,
Meerut
Submitted to
Pro. P.K.Gupta
Department of Genetics &
Plant Breeding,
Chaudhary Charan Singh
University, Meerut

4.  A study of meiosis in hybrid involvingA study of meiosis in hybrid involving
diploid and polyploid parents.diploid and polyploid parents.
 A study of karyotype including those fromA study of karyotype including those from
feulgen stained giemsa C-banded or N-feulgen stained giemsa C-banded or N-
banded somatic chromosome.banded somatic chromosome.
 Genome Analysis by NucleotideGenome Analysis by Nucleotide
Sequence VariationSequence Variation

5.  The hybrids among diploid,The hybrids among diploid,
Tetraploid ,hexaploid wheatTetraploid ,hexaploid wheat
Were used for meiotic studyWere used for meiotic study
by kihara 1924,by kihara 1924,
Three group genomeThree group genome
AA-T.monococcumAA-T.monococcum
AABB-T.dicoccumAABB-T.dicoccum
AABBDD-T.aestivumAABBDD-T.aestivum

6.  On the basis of morphology andOn the basis of morphology and
geographical distribution it was earliergeographical distribution it was earlier
suggested that a genome of cultivatedsuggested that a genome of cultivated
wheat was derived either fromwheat was derived either from
T.aegilopoids or T. Thaoudar(Riley 1965T.aegilopoids or T. Thaoudar(Riley 1965
 Molecular approaches,A-genome ofMolecular approaches,A-genome of
T.monococcum was derived fromT.monococcum was derived from
T.aegilopoides,but the A-genome ofT.aegilopoides,but the A-genome of
T,dicoccum and T,aestivum wasT,dicoccum and T,aestivum was
contributed by T.urartu(Dvork,1988;Dvorkcontributed by T.urartu(Dvork,1988;Dvork
et al ,1990et al ,1990))

7. THE STUDY OF MEIOSIS IN SEVERAL INTERSPECIFIC HYBRID
WHICH LED TO THE DEMONSTRATION THAT THE D-GENOME OF
HEXAPLOID WHEAT IS DERIVED FROM AE. SQUARROS (DD)

8.  This was verified experimentally by KiharaThis was verified experimentally by Kihara
(1944, 1947) and McFadden and Sears (1944,(1944, 1947) and McFadden and Sears (1944,
1946) independently.1946) independently.
 McFadden and Sears (1944,1946) WhenMcFadden and Sears (1944,1946) When
haxaploid wheat was artificially synthesized fromhaxaploid wheat was artificially synthesized from
T.dicoccoides and Ae.squarrosa(T.tauchii)T.dicoccoides and Ae.squarrosa(T.tauchii)
 D-Genome of T.aestivum and Aegilops speciesD-Genome of T.aestivum and Aegilops species
was recent eximind using repeted D N A clonewas recent eximind using repeted D N A clone
(pASI) Isolated from(pASI) Isolated from