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Combining Ability of Salinity Tolerance on the Basis of NaC1-Induced K+ Flux from Roots of Barley

journal contribution
posted on 2023-05-16, 20:51 authored by Chen, Z, Sergey ShabalaSergey Shabala, Neville MendhamNeville Mendham, Ian NewmanIan Newman, Zhang, G, Meixue ZhouMeixue Zhou
Salinity is a major abiotic stress affecting agricultural production. To understand the genetic behavior of salinity tolerance traits, a half-diallel cross was made among six barley cultivars (Hordeum vulgare L.), with contrasting levels of known tolerance, to study the combining ability of salinity tolerance on the basis of K+ loss from plant roots under saline conditions. The glasshouse pot experiments showed that the six parents were significantly different in salinity tolerance and those tolerances were highly correlated with the K+ flux measurements. The combining ability analysis showed that the variances of both general combining ability (GCA) and specific combining ability (SCA) were highly significant. Two tolerant cultivars, CM72 and Numar, showed significantly higher GCA for salinity tolerance (less K+ loss under salinity stress). Cultivars with medium GCA were YU6472 and Yan90260. Salinity tolerance was mainly controlled by additive effects with the tolerance allele showing partial dominance. High positive SCA was also found between two tolerant cultivars and between tolerant and medium-tolerant cultivars, indicating possible different tolerant genes or some minor genes in these cultivars. The combination of these genes from different sources of tolerant cultivars should produce cultivars with even greater tolerance. © Crop Science Society of America. All rights reserved.

Funding

Grains Research & Development Corporation

History

Publication title

Crop Science

Volume

48

Issue

4

Pagination

1382-1388

ISSN

0011-183X

Department/School

Tasmanian Institute of Agriculture (TIA)

Publisher

Crop Science Society of America

Place of publication

United States

Repository Status

  • Restricted

Socio-economic Objectives

Barley

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    University Of Tasmania

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