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为 探索 黄瓜 野生 变种 与普 通栽 培种 的杂 交一 代在 分枝 数、产 量、早熟 性等 主要 性状方面的 遗传相 关趋势,选 用了13 个黄瓜野 生变种 和2 个栽培种 为亲本 进行试验 ,采用 不完 全 N C DⅡ遗传 设计,4 次 重复。结 果表明 , W I2870 ×hardwickii 和 W I2870 ×sikkimensis 分别 是 F1 代 小区 平均结果数 最多和产 量最高 的杂交组 合,它们 的分枝数 亦为最 多。 从遗 传参 数看, 分枝 数与 始花 日数、结果数、产量之间 的遗传 相关 估 计值 都 较高 ,分 别 为r = 0 .774 1 ;0 .729 9 ;0 .858 0 。 分枝数与 早熟 性 的 遗 传 相 关 为 极 显 著 负 相 关 ,r = - 0 .754 2 。 遗 传 力 估 计 值 以 产 量 性 状 为 最 低(60 .5 % ) ,分枝 数性状为 最高(86 .1 % ) 。 分析结果 适用于小 果型黄 瓜品种的 育种。
In order to explore the genetic correlation of the main traits of the cross between cucumber wild variety and common cultivars in branch number, yield and early maturity, 13 wild cucumber varieties and 2 cultivars were selected as parents to carry out the experiment. N C D Ⅱ genetic design, 4 repetitions. The results showed that W I2870 × hardwickii and W I2870 × sikkimensis were the crosses with the highest average yield and the highest yield in F1 generation, respectively, with the highest number of branches. According to the genetic parameters, the genetic correlations between the number of branches and the number of the first flowering days, the number of the results and the yield were all higher, r = 0 respectively. 774 1 ; 0. 729 9 ; 0. 858 0 . The genetic correlation between branch number and precocity was extremely significantly negatively correlated, r = - 0. 754 2. The heritability estimates showed the lowest yield traits (60.5%) and the highest trailing number traits (86.1%). The results are suitable for the breeding of small fruit cucumber varieties.