Abstract
Soil salinity is among the major abiotic stresses affecting crop yield. Phenotypic and biochemical studies are needed for screening of salt tolerant genotypes that could be used in breeding programme. The present study was conducted to ascertain the morphological or agronomical traits contributing for yield and to identify salt tolerant RILs. A mapping population of 94 recombinant inbred lines (RILs) (F8) developed from cross between wheat genotype Kharchia 65 and HD 2009 were sown under stressed and non-stressed condition in microplots. STI was calculated to normalize the data. Salinity tolerance value was calculated through PCA and STI values. Based on the salinity tolerance value the RILs were grouped into three groups tolerant, moderately tolerant and susceptible. PCA indicated that the first three components accounted for 63.35% of the total variations. Tiller number showed significant positive correlation with number of earheads, plant height, length of earheads, spike number, K + concentration and 1000 grain weight. Proline is an important biochemical parameter and its accumulation under salt stress condition is related with salinity tolerance and ultimately to grain yield. The study concluded that PCA based grouping is an effective tool to identify tolerant genotypes and that tiller number is a good parameter for evaluating salinity tolerance at early growth stages in plants.
Highlights
Wheat is one of the most important world’s food crops which contribute substantially in food and nutritional security
The study concluded that Principal component analysis (PCA) based grouping is an effective tool to identify tolerant genotypes and that tiller number is a good parameter for evaluating salinity tolerance at early growth stages in plants
The present study concluded that tiller number is a good parameter for evaluating salinity tolerance at early growth stages in plants and is highly correlated with yield
Summary
Wheat is one of the most important world’s food crops which contribute substantially in food and nutritional security. Production and productivity of wheat is affected by several abiotic constraints including high temperature, low temperature, drought and salinity. There are two ways to deal with this problem: one is to reclaim soil by the application of chemicals and the other is to develop varieties which can withstand salinity. The technologies to reclaim land and maintain salt balance is expensive and even in many situations soil amendments based reclamation are either not possible or economically viable. Conventional and artificial breeding approaches are used to develop varieties tolerant to salinity stress. Development of salt tolerant varieties needs morphological and physiological studies of the genotypes conducted under controlled and stressed conditions in field, to identify salt tolerant genotypes and use them in breeding programs
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
