番茄分離族群中抗根瘤線蟲品系之篩選

Screening for Root-Knot Nematode Resistance in Segregating Tomato Population

從21個番茄分離族群中，進行抗根瘤線蟲選拔。在早期分離族群時，利用苗期接種根瘤線蟲，篩選抗根瘤線蟲之品系是非常有效的方法。使用單株選拔和後裔檢定，選出抗線蟲因子為同基因型的20個F5品系，這些品系除具有好的園藝性狀，果較大（40~150克），果硬及果色佳外，更重要的是這些品系較對照品糧TK70貽南選2號具有更好的抗熱性。在這些品系中以CL4184-0-0-2R-1NR, CL4184-0-0-19R-1NR, CL4656-2-0-3R-1NR, CL4656-2-0-5R-1NR及CL4657-9-0-4R-1NR最有希望。目前繼續進行抗青枯病和產量的評估。

Selection of root-knot nematode resistance was conducted from 21 segregating tomato populations. The seedling screening method by using egg inoculation was found to be very effective in identifying nematode resistance in the early segregating populations. By conducting single plant selection and progeny test, 20 F5 lines were identified to be in homozygous form for nematode resistance. These lines also exhibit nice horticultural traits. They have fairly large fruit size (40-150 gm), nice firmness and excellent color, more importantly most of them have much better heat resistance than the control cultivar, TK 70 and Tainan Selection No. 2. Among them, lines, CL4184-0-0-2R-1NR, CL4 184-0-0-19R-1NR, CL4656-2-0-3R-1NR, CL4656-2-0-5R-1NR and CL4657-9-0-4R-1NR appeared to be most promising. They are being evaluated for bacterial wilt resistance and yielding ability.