USING WILD SOYBEAN RESOURCES TO BREED THE NEW SOYBEAN GERMPLASMS OF HIGH QUALITY AND RESISTANCE TO DISEASES

摘要

Using high yield cultivated soybean as recurrent parents, we made the backcrosses with intermediate materials which derived from the cross combinations between wild and cultivated soybeans. Three new elite germplasms were developed, their protein contents are all above 45%, and their total of protein and oil contents are above 63%. Longpin8802-1, one of the three elite germplasms, is resistant to phytothora rot and frogeye leaf spot, and its protein content, oil content and total of both protein andoil content are 45.64%, 18.42% and 64.06%, respectively. Longpin01-757 is resistant to frogeye leaf spot, and its protein content, oil contents and total of both protein and oil contents are 45.99%, 19.40% and 65.39%, respectively. Longpin9501 has the medium resistance to frogeye leaf spot, and its protein content, oil content and total of both protein and oil content are 45.11%, 18.32% and 63.43%, respectively. The research data shows that it is very effective way to broaden soybean genetic basis and develop the new soybean germplasms with high quality and resistance to diseases and good agronomic characters, using high yield cultivated soybeans as recurrent parents to make the backcrosses with interspecific hybrids which derived from the cross combinations between wild and cultivated soybeans