The development

of CCs and MCCs provides an effective way

The development

of CCs and MCCs provides an effective way to solve these problems. However, there is always a tradeoff between maintaining genetic diversity and integrating desirable traits, owing to the relatively narrow adaptability of soybean varieties that has resulted from their sensitive light and temperature responses. Accordingly, the direct utilization of the CCs and MCCs encounters limitations in soybean breeding practice. CP-868596 cost The screening of soybean accessions to develop an IACC was based on the strategy of MCCs, which selects a set of accessions with defined numbers and high genetic diversity. The IACC of soybean is composed of accessions with desirable agronomic and nutritional traits and will meet the demand for accessions with traits useful to soybean breeders. Thus the development of the IACC further expands the concepts of CC and MCC. The CC and MCC of soybean have broad representativeness. The analysis of nine qualitative and five quantitative phenotypic traits of soybean accessions from the

Huanghuaihai eco-region in the primary CC showed that the coefficients of variation of these traits were similar to those in the FC [34]. The diversities of these 14 phenotypic traits in the CC and FC were not significantly different. These results suggested that the CC of soybean represents the diversity of the FC. Analysis IDH inhibitor of the population structure and genetic diversity of soybean accessions in the MCC showed that the MCC of soybean has several features including small sample size, broad representation, low redundancy, and rich diversity [20]. In addition, both common and specific alleles were observed among soybean accessions from different eco-regions. The genetic background could accordingly be broadened by incorporation of soybean accessions of different types. In this study, the concept of the IACC was based on the evaluation of soybean germplasm resources. A collection of soybean accessions

with specific desirable agronomic and nutritional traits (including cold tolerance, drought tolerance, salt Amobarbital tolerance, SCN resistance, SMV resistance, high protein content, and high fat content) and high diversity of other traits was selected and formed an IACC. This collection showed a high level of diversity and a wide range of representativeness, based on analysis of eco-regions, agronomic traits, and molecular background. Soybean accessions in this IACC can serve as a supplement to the MCC and promote the effective use of crossing parents in soybean breeding. Soybean accessions with specific traits in CCs have been developed in a previous study for utilization of soybean germplasm resources with desirable traits.

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