Search for genetic resources of soybean with propensity for green stem disorder insensitivity and evaluation by pod removal at seed filling stage in Northern Kyushu area

Ogata Daisuke, Okuno Ryohei, Uchikawa Osamu

doi:10.1270/jsbbr.20j10

<p>We searched for genetic resources of a soybean with reduced propensity towards green stem disorder (GSD) than ‘Fukuyutaka’, the leading cultivar in Northern Kyushu area, and considered whether the occurrence of GSD in soybean can be evaluated stably by pod removal at the seed filling stage. The occurrence of GSD in 26 soybean cultivars that can be grown in Northern Kyushu area, as well as that in 11 soybean lines developed at the Fukuoka Agriculture and Forestry Research Center, was examined from 2015 to 2017, of which the occurrence of GSD in ‘Suzuotome’ was the lowest. In addition, using 4 soybean cultivars, ‘Fukuyutaka’, ‘Sachiyutaka’, ‘Suzuotome’ and ‘Chikushi-B5’, the occurrence of GSD in ‘Suzuotome’ was significantly lower than in ‘Fukuyutaka’ and ‘Sachiyutaka’ under high-temperature and drought conditions from R3 (beginning of pod setting) to R5 (beginning of seed filling), when GSD is likely to accelerate. Furthermore, varietal differences in the occurrence of GSD by 50% pod removal at the seed filling stage became apparent compared with no treatment in the 4 soybean cultivars above, and the occurrence of GSD in ‘Suzuotome’ was significantly lower than that in ‘Fukuyutaka’ and ‘Sachiyutaka’. These results revealed that ‘Suzuotome’ may be the genetic resource of soybean with the greatest GSD insensitivity, and 50% pod removal at seed filling stage is useful for evaluating GSD in soybean in Northern Kyushu area.</p>

Search for genetic resources of soybean with propensity for green stem disorder insensitivity and evaluation by pod removal at seed filling stage in Northern Kyushu area

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