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据一些文献报道,许多高产品种的育成不是通过增加作物的相对生长率,而是通过提高收获指数,即提高作物收获的部分同整个植株的比值。虽然干物质分配上的这种变化对育种有很大意义,但控制干物质分配的机理仍不清楚。有人认为,干物质分配的控制与库(利用或积累净光合产物的器官)的特性有关。
It has been reported in some literature that breeding of many high-yielding varieties does not increase the relative growth rate of the crop, but by increasing the harvest index, ie increasing the ratio of the part of the crop harvested to the whole plant. Although this change in dry matter allocation is of great importance to breeding, the mechanism by which dry matter allocation is controlled remains unclear. It is argued that the control of dry matter allocation is related to the characteristics of the stock (organs that utilize or accumulate net photosynthetic products).