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番茄杂交优势利用已在生产上广泛应用,目前我县番茄杂交一代的栽培面积占总面积的90％。现将番茄杂交制种技术总结如下: (一)育苗时间我县番茄生产上用的杂交组合主要有三个:北京早红×402;北京早红×满丝;北京早红×日本大红。父本402,满丝,日本大红属于晚熟品种,播种到始花期需120～140天;而北京早红属于早熟品种,只需95～100天。杂交制种要求两个亲本花期相遇,还要有适当的花数比例,故而402、满丝、日本大红应在12月中旬播种,3月上旬定植在塑料中棚内(面积为2～3分地),苗龄80天。北京早红,1
Tomato hybridization advantage has been widely used in production, at present I County tomato hybrid generation of cultivated area of 90% of the total area. Now tomato hybrid seed production techniques are summarized as follows: (a) nursery time my county tomato production hybrid combinations are mainly three: Beijing early red × 402; Beijing early red × full wire; Beijing early red × Japanese red. Paternal 402, full silk, Japanese red belongs to the late-maturing varieties, the first flowering to sowing 120 to 140 days; and Beijing Zaohong is a precocious species, only 95 to 100 days. Hybrid seed production requirements of the two parents met, but also the appropriate number of flowers, so 402, full of silk, Japan Red should be planted in mid-December, early March planting in plastic shed (area of 2 to 3 Ground), seedling age 80 days. Beijing early red, 1