Indian Society of Genetics & Plant Breeding

Karyotype analysis of five wild Elymus species of Qinghai-Tibet plateau

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The karyotype of five wild Elymus species of Qinghai-Tibet
plateau were determined by root tip squash method. The
results showed that all of the Elymus species had satellites
in five populations and the karyotype formulae in those
materials were: DL population, 2n = 6x = 42 = 32m + 10sm,
2B type; DX population, 2n = 4x = 28 = 2M + 26m, 1B type; SN
population, 2n = 4x = 28 = 26m + 2sm, 2B type; NQ population,
2n = 4x = 28 = 20m + 8sm, 2A type; RB population, 2n = 6x =
42 = 38m + 4sm, 1A type. Chromosome variation and degrees
of evolution of these five species was DL, SN, NA, DX and
RB from high to low level. This study will improve the
understanding of the genetic diversity of Elymus of
Qinghai-Tibet Plateau and provide effective evidence on
genetic relationship and crop breeding.

Keywords: Elymus, germplasm, karyotype analysis, Qinghai-Tibet Plateau, crop breeding


Year: 2015
Volume: 75
Issue: 1
Article DOI: 10.5958/0975-6906.2015.00023.1
Print ISSN: 0019-5200
Online ISSN: 0975-6906


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