耐低温弱光番茄种质资源的筛选及新品种选育

Screening of Tomato Germplasm Resources with Low Temperature and Poor Light Tolerance and Breeding of New Varieties

为应对华北地区冬季低温、弱光对设施番茄造成的影响,以河北省农林科学院经济作物研究所单株分离的番茄自交系为试验材料,分别在发芽期进行种子低温处理、在幼苗期进行低温弱光处理,发芽期利用种子发芽率,幼苗期利用叶片抗氧化酶(POD、SOD、CAT)活性、MDA含量和叶绿素含量,筛选出发芽期耐低温种质资源3份、幼苗期耐低温弱光种质资源3份。以筛选出的材料进行组配,综合耐低温弱光性、抗病性以及其他特征特性,选育出适合河北地区冬春茬日光温室及早春大棚种植的耐低温弱光番茄新品种“冀番144”。该品种为无限生长型;果实扁圆形,单果重250 g,Vc含量251.7 mg/kg (FW),可滴定酸含量0.56%,可溶性糖含量30.90 mg/g,可溶性固形物含量4.2%;含叶霉病抗性基因Cf-5、枯萎病抗性基因I-2、灰叶斑病抗性基因含Sm,适合河北地区冬春茬日光温室或早春塑料大棚种植。

In order to cope with the impact of low temperature and poor light on facility tomatoes in winter in North China,tomato inbred lines isolated from a single plant by the Institute of Cash Crops of Hebei Academy of Agriculture and Forestry Sciences were used as experimental materials.Low temperature treatment was carried out during seed germination,and low temperature and poor light treatment was carried out during seedling period.Seed germination rate was used during the germination period to screen 3 low temperature tolerant germplasm resources,and leaf antioxidant enzymes(POD,SOD and CAT)activities,MDA content,and chlorophyll content were used during the seedling period to screen 3 low temperature and poor light tolerant germplasm resources.Using the selected materials for combination,a new tomato variety Jifan 144 with low temperature and low light tolerance,disease resistance,and other characteristic traits suitable for planting in winter and spring solar greenhous and early spring plastic greenhous in Hebei Province was selected and bred.It is of infinite growth type.The fruit is flattened,with the single weight of 250 g,Vc content of 251.7 mg/kg(FW),titratable acid content of 0.56%,soluble sugar content of 30.90 mg/g,and soluble solids content of 4.2%.Containing the leaf mold resistance gene Cf-5,wilt resistance gene I-2,and gray leaf spot resistance gene Sm,Jifan 144 is suitable for planting in winter and spring solar greenhous or early spring plastic greenhouse in Hebei.