Indian Society of Genetics & Plant Breeding

CYTOGENETIC ANALYSIS AND DIFFERENTIAL RESPONSE OF RYEINTROGRESSED BREAD WHEAT GENOTYPES FOR COLD TOLERANCE

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Twenty three rye-introgressed bread wheat genotypes, two triticale parents, one rye
and 2 wheat checks were examined for tolerance to cold stress and were subjected to
cytogenetic analysis. On the basis of colorimetric estimation of the intensity of extracted
formanzan, rye was found to. be the most cold tolerant cereal, while five genotypes,
viz., TW9321, RL75/83, RL6-3-4, TW9308 and TW9328 together with two triticale
genotypes were found to be cold tolerant. Cold tolerance is suppressed to a great
extent in triticale, making it difficult to transfer high levels of cold tolerance to wheat.
The derivatives, TW9308 and TW9321 carried 7R(7D) substitution while the derivative
TW9328 carried 6R (60) substitution, indicating the association of cold tolerance with
6R and 7R chromosomes of rye.
 

Keywords: Rye, bread wheat (Triticum aestivum L.em Theil), cold tolerance, introgression, wheat-rye chromosome substitutions, cytogenetic analysis

Info

Year: 2000
Volume: 60
Issue: 1
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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