Airborne particles collected from a heavily industrialized site were analyzed by chemical speciation of seven trace metals: Pb, Cd, Cr, Cu, Ni, Zn, and As. The average concentrations were as follows: Zn, 502.0 ± 230.7; Pb, 176.5 ± 310.9; Cu, 111.9 ± 82.7; As, 38.0 ± 31.0; Cr, 21.5 ± 24.4; Cd, 20.8 ± 17.4; and Ni, 11.4 ± 8.4 ng/m3. The median enrichment factor (EF) values of Cd (7,280), As (1,030), Cu (215), Zn (214), and Pb (143), with respect to iron, were much larger than 100. We observed that Cd was found in the soluble and exchangeable form (56.9%), and that Pb and Cr were found in carbonates, oxides and the reducible form (69.8% and 61.1%, respectively). These two forms, which are the most easily absorbed into human body tissue, predominated in most of the trace metals investigated in this study.

With 3 diferent recurrent parents (RPs) (‘Suwon 345’, ‘Iri 390’ and ‘Milyang 95’) and 3 diferent donor parents (‘Dae-cheongbyeo’, ‘RantaiEmas’ and ‘Chugoku 69’ for Xa1, Xa2 and Xa3, respectively), 9 near isogenic lines (NILs) were developedand subjected t

Genetic diversity of Korean landrace rice accessions was assessed with microsatellite markers. The 214 alleles weregedfrom 3 for SSS locus to 37 for RM206 locus with an average number of 12.6 alleles per locus. Gene diversity values according tothe 17 mic

Pod dehiscence (PD), defined as the opening of pods along both the dorsal and ventral sutures, causes the seed to shatter in the field before harvesting and results in loss of seed yields. However, breeding for resistance to PD is difficult due to the complicated genetic behavior and environmental interaction. The objective of the present research was to analyze the genetic behavior of PD for improving the breeding efficiency of resistance to PD in soybean. PD after oven-drying the sampled pod at 40~circC for 24 hours was the most reliable to predict the degree of PD tested in the field. Keunolkong, a dehiscent parent, was crossed with non-dehiscent parents, Sinpaldalkong and Iksan 10. Using their F1~;and~;F2 seeds, PD was measured after oven drying the pod at 40~circC for 24 hours. The gene conferring PD behaved in different manners depending on the genetic populations. In the Keunolkong~times Sinpaldalkong population, PD seemed to be governed by single major recessive gene and minor genes, while several genes were probably involved in the resistance to pod dehiscence in the Keunolkong~times Iksan 10 population. Heritability for PD estimated in F2 population showed over 90~% in the two populations. High heritability of PD indicated that selection for resistance to PD should be effective in a breeding program. In addition, genetic mapping of quantitative locus (QTL) for PD in both populations may reveal that genes conferring PD are population-specific