Response of the population of wild soybean (Glycine soja) in the Bohai Bay Littoral bestriding Tianjin and Tangshan areas to high salinity soil stress
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    Abstract:

    The exploitation of crops with salinity tolerance is significant for the agriculture. Total 895 individual plants of wild soybean were collected from the littoral population in the Bohai Bay region bestriding Tianjin and Tangshan areas. The tolerance identification was carried out with three experimental treatments.The results showed that there were a series of salinity tolerant individual lines of different intensities at various growth phases in the Jin-Tang population, suggesting that edaphic ecotypic differentiation existed in this population. At seed germination, there were three kinds of lines for germination ability: germinable (high-tolerant); germinable at a reduced level of salinity stress; incapable (sensitive). The growth of plants at earlier stage was worse inhibited than subsequent stages. The damaged degrees of morphological traits in the population showed as the order: overground dry weight, yield, seed number per plant, 100-seed weight, and harvesting index per plant. The coefficients of variation in traits between lines was ordinal yield, seed number, pod number, harvesting index, overground dry weight per plant, and 100-seed weight. The Jin-Tang population had high levels of edaphic ecological adaptation and edaphic ecotype with high levels of salinity tolerance, which was expected to become useful in developing high salinity-tolerant soybeans.

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