scholarly journals An Expedited Phenotypic Approach Towards Organic Reaction Generality

Author(s):  
Cesar N. Prieto Kullmer ◽  
Jacob A. Kautzky ◽  
Shane W. Krska ◽  
Timothy Nowak ◽  
Spencer D. Dreher ◽  
...  

Reaction generality is crucial in determining the overall impact and usefulness of organic synthetic methods. In contrast, contemporary generalization processes seem unable to meet the growing demand for robust methodology. We sought to develop an accelerated approach towards achieving generality, inspired by phenotypic screening, that rapidly expands the scope and utility of synthetic methods. This approach was validated by example of the metallaphotoredox decarboxylative arylation, resulting in the discovery of a novel additive that overcomes many lingering limitations of this method and has significant mechanistic implications for nickel-catalyzed cross couplings in general.

2013 ◽  
Vol 19 (2) ◽  
pp. 57-65
Author(s):  
MH Kabir ◽  
MM Islam ◽  
SN Begum ◽  
AC Manidas

A cross was made between high yielding salt susceptible BINA variety (Binadhan-5) with salt tolerant rice landrace (Harkuch) to identify salt tolerant rice lines. Thirty six F3 rice lines of Binadhan-5 x Harkuch were tested for salinity tolerance at the seedling stage in hydroponic system using nutrient solution. In F3 population, six lines were found as salt tolerant and 10 lines were moderately tolerant based on phenotypic screening at the seedling stage. Twelve SSR markers were used for parental survey and among them three polymorphic SSR markers viz., OSR34, RM443 and RM169 were selected to evaluate 26 F3 rice lines for salt tolerance. With respect to marker OSR34, 15 lines were identified as salt tolerant, 9 lines were susceptible and 2 lines were heterozygous. While RM443 identified 3 tolerant, 14 susceptible and 9 heterozygous rice lines. Eight tolerant, 11 susceptible and 7 heterozygous lines were identified with the marker RM169. Thus the tested markers could be efficiently used for tagging salt tolerant genes in marker-assisted breeding programme.DOI: http://dx.doi.org/10.3329/pa.v19i2.16929 Progress. Agric. 19(2): 57 - 65, 2008


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