Several parameters of seed vigour were monitored during seed development and maturation in three contrasting genotypes of soyabean (Glycine max)— the USA cv. Bossier, the Indonesian line TGM 737p, and the cross between these two parents TGx 536–02D—grown in three different temperature regimes. Evidence of a decline in seed quality in the pre-harvest environment was seldom detected until harvest maturity, when seed moisture content had declined naturally to 14–15%. Atypically, an increase in the susceptibility of freshly-harvested shelled seeds to imbibition damage was detected before harvest maturity for cv. Bossier in the two warmer regimes. Seeds of cv. Bossier were also far more vulnerable after harvest maturity to pre-harvest deterioration in the warmer environment than the other two genotypes. From these results and those from two earlier studies, it would appear that the main seed quality characteristic of TGm 737p that has been incorporated successfully into the cross is resistance to soaking damage, rather than enhanced air-dry seed storage longevity per se.
Desarrollo y vigor de la semilla en la soja