UNLABELLED Tetraploidy modifies root anatomy which may lead to differentiated capacity to uptake and transport mineral elements. This work provides insights into physiological and molecular characters involved in boron (B) toxicity responses in diploid (2x) and tetraploid (4x) plants of Carrizo citrange (Citrus sinensis L. Osb. × Poncirus trifoliata L. Raf.), a widely used citrus rootstock. Wit...

ETAILED analyses of populations containing natural hybrids have D been reported recently. ANDERSON (1936) has suggested a method for expressing quantitatively the extent of hybridity of a population and for comparing various populations, and this method has been applied to various genera such as Tradescantia (ANDERSON 1936) , Solidago (GOODWIN 1937), and Iris (RILEY 1938, 1939) The present pape...

Genetic crosses of alpha-glycerophosphate dehydrogenase (alpha-GPDH) phenotypes in the pink salmon, Oncorhynchus gorbuscha (Walbaum), reveal that this enzyme is encoded by a single locus with two codominant alleles (Slow and Fast). The significance of single gene control of alpha-GPDH is discussed in relation to the purported tetraploid nature of the salmonids.

Specific antibody-producing lymphocyte hybridomas have become a major tool of research in tumor immunology. The production of monoclonal antibodies by lymphocyte hybrido mas in vitro or in ascites fluid in vivo dates from the experiments of Kohler and Milstein (2), followed closely by many others. The purpose of this correspondence is to direct attention to tetraploid murine lymphoma cell lines...