草莓五倍体种间杂种的获得及回交研究

从草莓品种与野生种杂交组合宝交早生(8x)×森林草莓(2x)、哈尼(8x)×森林草莓(2x)和哈尼(8x)×黄毛草莓(2x)中分别各得到1株五倍体种间杂种WBT1、WBT2和WBT3,对其植物学性状、果实性状、花粉大小及生活力等进行了观察。用五倍体杂种与栽培品种哈尼和全明星进行回交,得到了六倍体、七倍体和九倍体后代实生苗,对这些不同倍性杂种的来源进行了分析。这些整合野生草莓基因的不同倍性种间杂种具有进一步杂交利用的潜力,对改良现代栽培草莓具有较大意义。

Study on Obtaining Pentaploid Interspecific Hybrids and its Backcross in Strawberry

The pentaploid interspecific hybrids WBT1, WBT2 and WBT3 wereobtained respectively from the cross combinations Hokowase(8x)×F. vesca(2x), Honeoye(8x)×F. vesca(2x)and Honeoye(8x)×F. nilgerrensis(2x). The botanical and fruit trat, and pollen size and viability of the three pentaploid interspecific hybridswere observed. The hexaploid, heptaploid, nonuploid seedlings were obtained from the backcross of the pentaploid interspecific hybrids with cultivars Honeoye and Allstar. The origins of the seedlings with various ploidy were postulated. These different ploidy hybrids integrated wild strawberry genes have further potential for hybridization utilization to improve modern strawberry cultivars.