番茄果实成熟后,在机械采收、运输、堆放过程中,常因撞击挤压而破裂。破裂的果实不仅商品价值下降,而且易腐烂变质,罐藏用番茄原料尤易遭此损失。对此,越来越多的番茄育种者企图选育具有耐受较大压力挤压而不破裂的番茄新品种[1]。早在1935年FischerA.[2]曾用长杆状苹果硬度计? Tomato fruit ripe, mechanical recovery, transportation, stacking process, often rupture due to impact extrusion. The broken fruit not only reduces the value of the commodity, but also perishables and deteriorates the raw material of the canister used for tomato storage. In response, more and more tomato breeders have attempted to breed new tomato varieties that are resistant to pressure extrusion without breaking [1]. As early as 1935 FischerA. [2] used a long rod apple hardness tester?