Indian Society of Genetics & Plant Breeding

The effects of Rht semi-dwarfing alleles on agronomic traits in Korean wheat cultivars

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The allelic variation at Rht-B1, Rht-D1 and Rht8 loci of Korean
wheat cultivars was determined to evaluate the relationship
between agronomic traits and different Rht alleles. Korean
wheat cultivars had high frequency of Rht-B1a (70.4%) and
Rht-D1a (51.9%) alleles. Thirteen cultivars carried both RhtB1a and Rht-D1b alleles but no cultivar carried both RhtB1b and Rht-D1b alleles. Only two cultivars, Namhae and
Ol, showed 206bp fragment and whereas remaining
genotypes showed 196bp at Rht8 loci. Cultivars carrying
Rht-D1a and Rht8
196bp alleles exhibited higher thousand
kernel weight and test weight (40.2g and 809.9g,
respectively) as compared to their counterpart alleles (36.6g
and 788.1g, respectively). Cultivars carrying Rht-B1a and
Rht-D1a alleles showed lower number of kernels per spike
than those with other alleles at Rht-B1 and Rht-D1 loci.
Cultivars, Namhae and Ol, carrying Rht8206bpallele showed
lower test weight regardless the allelic compositions at
Rht-B1 and Rht-D1 loci. Significant differences were
recorded in culm and spike length regardless of allelic
variation of these semi-dwarf genes.

Keywords: Wheat, semi-dwarf, allelic variation, agronomic traits.


Year: 2016
Volume: 76
Issue: 1
Article DOI: 10.5958/0975-6906.2016.00005.5
Print ISSN: 0019-5200
Online ISSN: 0975-6906


Chon-Sik Kang info_circle
Young Mi Yoon info_circle
Chul Soo Park info_circle

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