Authors:
K. Chattopadhyay Central Rice Research Institute, Cuttack, Odisha, India

Search for other papers by K. Chattopadhyay in
Current site
Google Scholar
PubMed
Close
,
D. Nath Central Rice Research Institute, Cuttack, Odisha, India

Search for other papers by D. Nath in
Current site
Google Scholar
PubMed
Close
,
R.L. Mohanta Central Rice Research Institute, Cuttack, Odisha, India

Search for other papers by R.L. Mohanta in
Current site
Google Scholar
PubMed
Close
,
B.C. Marndi Central Rice Research Institute, Cuttack, Odisha, India

Search for other papers by B.C. Marndi in
Current site
Google Scholar
PubMed
Close
,
D.P. Singh Central Rice Research Institute, Cuttack, Odisha, India

Search for other papers by D.P. Singh in
Current site
Google Scholar
PubMed
Close
, and
O.N. Singh Central Rice Research Institute, Cuttack, Odisha, India

Search for other papers by O.N. Singh in
Current site
Google Scholar
PubMed
Close
Restricted access

Saltol, a major QTL for salt exclusion, was derived from ‘Pokkali’, a salt-tolerant rice cultivar. Apart from Pokkali, many genotypes with wide variation for salinity tolerance offer ample scope for identifying new genes or QTLs underlying various tolerance mechanisms. Such genes could be aggregated into high-yielding backgrounds to reinforce a breeding programme. To identify potential donors for salt tolerance and prospective parental combinations for developing high-yielding salt-tolerant cultivars, ten genotypes were subjected to salt stress and evaluated for morpho-physiological traits and marker-allele polymorphism in the Saltol-QTL region. Although the salt-susceptible high-yielding varieties clustered together in a 3-D plot, principal component analysis showed marked spatial isolation among the tolerant genotypes. Unlike Pokkali and its derivative FL496, Rahspunjar maintained a higher level of K+ despite high Na+ influx in shoots. The wider genetic distances observed at both phenotypic and genotypic levels suggest the possibility of getting transgressive segregants among the offspring of crosses between Rahspunjar and Gayatri or Swarna Sub1. Similarly, SR 26B, which coped with the stress by diluting the Na+ load by maintaining a higher growth rate, differed from Pokkali or Nona Bokra: these two coped with the stress by regulating the transmission of Na+ from roots to photosynthetically active sites. The F2:3 population derived from Savitri × SR 26B showed wide morpho-physiological diversity for salt tolerance. SR 26B was the most distant genotype from Pokkali in the Saltol QTL region and was salt tolerant despite the absence of Pokkali alleles in this region.

Supplementary Materials

    • Supplementary Material
    • Supplementary Material
  • Collapse
  • Expand

 

 

To see the editorial board, please visit the website of Springer Nature.

Manuscript Submission: HERE

 

 

For subscription options, please visit the website of Springer Nature.

Cereal Research Communications
Language English
Size A4
Year of
Foundation
1973
Volumes
per Year
1
Issues
per Year
4
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0133-3720 (Print)
ISSN 1788-9170 (Online)