抗Y毒素馬鈴薯族群之篩選試驗

Abstract

自國際馬鈴薯中心引入50個對馬鈴薯Y病毒(PVY)具有免疫性的分離薯球族羣(tuber family)，共2,810個薯球（每一薯球爲不同的營養系），各族羣大小不一，自8個薯球到127個薯球不等，分別在農業試驗所的田間與網室試種，並以人工汁液接種PVY觀察。田間種植者只有66%的採收率，其餘營養系(Clone)或不發芽或生長勢不良；採收時已生育114天，但仍有許多植株莖葉仍綠，依植株早生性，薯球性狀與產量，選留14%共計192個營養系，各族羣的單株平均產量最低爲190g/pl，最高爲915g/pl。Fifty potato tuber families segregating for potato virus Y (PVY) resistance from International Potato Center were planted at Taiwan Agricultural Research Institute and evaluated for virus resistance and yield and quality of tubers. Each family has half of its clones planted in open field and the rest in screen house where inoculation of PVY-mosaic strain was conducted one month after planting. Different types of symptoms including top necrosis, leaf rolling, mosaics and combination of the above, were shown in different clones starting one months after inoculation. The segregation of immune and susceptible clones in each family was either 1:1 or 3:1.