甘藷品種改良

Abstract

本試驗為期選育豐產、質優之鮮食用及食品加工用新品種，採用人工及多向雜交方法育種，並按實生系選拔之育種程序進行。本年度多向雜交共採收雜交種子約20 萬粒，人工雜交四組合共採收種子4,213 粒，實生系選拔得春夏作40 品系，秋作160 品系，品系產量比較試驗，春夏作第一年組共選出4 個優良品系，秋裡作第一年組則選出14 個優良品系，以進行第二年組之產量比較之試驗。在區域試驗方面，秋裡作部份，供試4 品系經三個地點第二年試驗結果,供試品系中以CYY92-11 之塊根產量較佳。 The purpose of this breeding program were to develop new sweet potato varieties with high yield and good quality for table-use and processing-use, we adopted artificial cross and polycross to select new lines, the result are summarized as follow: a total of 4,213hybrids seeds were obtained from polycross and artificial cross during Oct. 2007 to Feb..2008through seedling selection, 40 clones for spring planting and 160 clones for fall planting were selected from 10,000 and 80,000 hybrid seedling respectively. Among the entries in primary yield trials, 10clones and 14 clones were selected for the spring and fall planting, those lines are all superior to the check variety in root yield potential as well as taste and agronomic characters. Among the entries in advanced yield trial, 4 clones for the spring planting and 6 clones for the fall planting were selected for high fresh root yield potential and good quality, four newly developed clones of regional yield trial were conducted in this fiscal year, In the fall planting of 2,008 CYY92-11 were higher average fresh root yield at four locations than other tested clones.