Conclusions
In conclusion, our results suggested that modern wheat allocated more
resource to reproduction than to vegetative growth. Old Monkhead can
fall into a small degree of the tragedy of the commons when confronting
with intra-variety root competition, and the occurrence and magnitude of
the tragedy of the commons were dependent on resource availability and
variety resource-use strategy. Modern 92-46 has shown a conservative
strategy related to efficiency in seed production, while old Monkhead
has adopted an exploitative resource strategy related to greater
individual competitiveness. Based on our findings, we suggest that crop
breeding can increase population yield by consciously selecting
varieties which reduce individual competitiveness.