Compared with morphological and life history traits, quantitative genetic variation of metabolic and related traits in animals has been poorly studied. We used flow-through VCO(2) respirometry and simultaneous activity measurement on nymphs of the sand cricket (Gryllus firmus) from inbred lines to estimate broad-sense heritability of four metabolic variables. In addition, we measured a number o...

In the last two decades, the accumulation of heavy metal in crop grains has become the study hotspot. In this study, 19 representative elite maize inbred lines and 3 hybrid varieties were investigated at the seedling stage, which can accumulate Pb and Cd in the stems and leaves, respectively. The results demonstrated that significant differences are among inbred lines for accumulation of heavy ...

Four sets of recombinant inbred lines of mice have been used to analyze genetic differences in acute toxicity of the drug, isonicotinic acid hydrazide. Standard inbred strains, their F(1) hybrids and recombinant inbred strains were all challenged with a single dose of the drug. The percent mortality of the different groups was analyzed to estimate heritability and the number of genes affecting ...

B ETWEEN 1938 and 1949 seven different unrelated inbred lines of Duroc swine were developed by the Oklahoma Agricultural Experiment Station in cooperation with the Regional Swine Breeding Laboratory. In sixteen of the twenty-two farrowing seasons from the spring of 1939 through the fall of 1949, both inbred and two-line-cross litters were produced. In some seasons outbred Duroc and three-linecr...

Mice genetically susceptible or genetically resistant to the leukemogenic effects of A-MuLV(Mo) were tested for their expression of the B-lineage neoplastic transformation-associated antigen, 6C3Ag. Genetically resistant inbred strains and recombinant inbred lines developed neither cells expressing high levels of 6C3Ag (6C3Aghi) in their hematolymphoid tissues nor Abelson leukemias. Genetically...

Whether to develop inbred cultivars or F1 hybrids is a dilemma faced by many rice (Oryza sativa L.) breeders. This could be partially answered if one could select superior recombinant inbred lines with an equal yielding ability and good quality traits from commercial F1 hybrids. Thus, it was attempted in this study to select superior inbred lines from 2 commercial F1 hybrids after application o...

Although the genetic basis of inbreeding depression is still being debated, most fitness effects are thought to be the result of increased homozygosity for recessive or partially recessive deleterious alleles rather than the loss of overdominant genes. It is unknown how many loci are associated with inbreeding depression, the genes or gene pathways involved, or their mode of action. To uncover ...

Fall armyworm [Spodoptera frugiperda (J./E. Smith); FAW] is negatively impacting sustainable maize production, particularly in smallholder farming systems sub-Saharan Africa. Two sets of germplasm (commercial cultivars and experimental hybrids, local exotic inbred lines) were evaluated under managed natural FAW infestation to identify tolerant material with superior grain yield performance. Sig...

Maize occupies a significant place in the world agriculture. Yellow kernel maize contains mainly non-provitamin A carotenoids: lutein and zeaxanthin. The accumulation of provitamin carotenoids is regulated by favourable alleles lcyE crtRB1 genes could be used for enhancement these grain through breeding. In this study, molecular screening Romanian germplasm was performed, looking genes, level d...