Development of a new soybean [Glycine max] cultivar for soymilk 'Nagomimaru'
2009
Hajika, M.(National Inst. of Crop Science, Tsukuba, Ibaraki (Japan)) | Takahashi, K. | Yamada, T. | Komaki, K. | Takada, Y. | Shimada, H. | Sakai, T. | Shimada, S. | Adachi, T. | Tabuchi, K. | Kikuchi, A. | Yumoto, S. | Nakamura, S. | Ito, M.
A new soybean cultivar, 'Nagomimaru' was bred from the progeny of a cross combination between 'Kariko 0542' and 'Tachinagaha'. Kariko 0542 was the BCsub(2)Fsub(1) line developed from the back-crossing between alpha less (1) (donor parent, later registered as 'Yumeminori', which lacked alpha and alpha' subunits of beta-conglycine in the seeds, the former of which is one of the major allergenic proteins) and 'Tachinagaha' (recurrent parent). 'Nagomimaru' also lacked these subunits that were inherited from an alpha less (1) line. 'Nagomimaru' showed an approximately equivalent yield and the strong lodging resistance of its recurrent parent 'Tachinagaha', while the time of maturity was slightly earlier and the seed size was a little smaller. The protein and oil contents were the same as 'Tachinagaha' and classified into 'medium'. The resistance to soybean mosaic virus was 'medium', and resistance to soybean cyst nematode was 'weak'. 'Nagomimaru' was suitable for the production of soy milk and light brown soybean paste (miso) but not for soybean curd (tofu), natto, or boiled soybean. Gly m Bd 30k, another major allergenic protein in the seeds, which is the most frequent inducer of allergic symptoms in patients among the soybean allergenic proteins, is more easily removed from the food products of 'Nagomimaru' than those of wild-type cultivars in beta-conglycine, because Gly m Bd 30k cannot bind to the alpha and alpha' subunits using a disulfide bond in the soymilk of 'Nagomimaru' unlike that of wild type Gly m Bd 30k. Thus, 'Nagomimaru' will be useable as a primary material for the production of low allergenic or allergen-free soybean products.
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