【摘要】 以5个带有Tm2nv基因的加工番茄新品系为母本，加州汁用和美东作父本配制10个杂交组合，以这些试材对加工番茄35个主要性状的杂种优势进行了系统的研究。结果表明：加工番茄早熟性和总产量的杂种优势十分明显而普遍，因此利用杂种优势是加工番茄早熟、丰产育种的简捷而有效的途径。而杂种在可溶性固形物、Vc、茄红素等品质性状方面多表现为双亲的中间类型，出现强优势的机率较小，因而以改善上述品质性状为主要育种目标时，不宜采用杂种优势育种法。加工番茄F1果实横径具有较强的优势，果实纵径则偏于中间值，因此要选育耐压、抗裂的长果形加工番茄品种，则应选择果形指数大的材料为亲本。在10个杂交组合中，杂交组合“9596－25ｘ美东”在早熟性、丰产性及品质方面均表现较好，是一个优良的杂交组合，可作进一步的比较试验。更多还原

【Abstract】 Using five new pocessing tomato lines carrying Tm2nv gene as female parents and Meidong and Jiazhouzhiyong tomato lines as male parents,ten cross combinations were made up. These materials were used to study the heterosis of 35 agronomic and quality characters. The conclusions obtained were as follows. The heterosis was apparent and common in these processing tomato lines,therefore the heterosis breeding is one of the easy and efficient methods of breeding for earnness and high yield. However, lower heterosis was generally showed for the quality characters such as soluble solid content,Vc and lycopene;the probability of high heterosis of these characters is very small,so the heterosis breeding method should not be used to improve these characters. The heterosis of fruit width was higher,and the value of fruit length was inclined to the mean of two parents,therefore the materials with high fruit shape index should be selected as parents in order to breed tomato varieties with long--shape fruits which can endure a certain pressure and resist to crack. Among the ten cross combinations, "9596--25 ｘ Meidong" is the best one, so it could be used for the further comparison test.更多还原