(55(3):149-163)Breeding of Purple-glutinous Maize Hybrid Tainung No.5

黑糯台農5號為單雜交種，由自交系PE31-2及PO4雜交而成。母本PE31-2係由台中大里地區所蒐集之黑糯族群（代為PE）經自交分離至S5世代所育成之自交系，果穗為圓筒型，籽粒行數為8行、硬粒型，紫色，籽粒深度長、多穗型，穗軸小，果皮薄之特性。父本PO4係由嘉義新港地區蒐集之黑糯族群(PO)經自交分離至S5世代所育成，具有植株葉片生長旺盛、長穗型、籽粒行數8行、硬粒型，紫紅色，多穗型，穗軸小，果皮薄之特性。黑糯台農5號為單雜交種，植株外觀、株高及穗型整齊，穗長16~18 cm左右，行數為8行居多，花絲為白色，全國二年四期作含苞葉鮮果穗產量平均為10,961 kg/ha，與對照種黑美珍略低或無明顯差異；去苞葉鮮果穗產量為6,970 kg/ha較對照種(黑美珍)稍低，具有優良品質之特性。栽培時以120 ~ 150 kg/ha氮肥施用量較為理想。栽培密度以80 × 25 cm之行株距下可獲得合格穗率高且較高鮮果穗產量。黑糯新品系農試育TAPH89-05號於94年11月29日通過命名為黑糯台農五號。Tainung No. 5 is a single-cross purple- glutinous maize hybrid. Its parental inbreds are PE31-2 and PO4. The maternal parent PE31-2 is a flint selected from the inbreeding progenies of PE population from Taichung. The paternal parent PO4 is a flint selected from the inbreeding progenies of PO population from Jiayih. The PE31-2 has the characters of long ear length, 8 row, purple kernel, larger kernel, thinner pericarp, high general combining ability (GCA), and susceptible to Asia borer in whorling stage and pollen shedding stage. The PO4 has the characters of long ear length, 8 row, purple-red kernel, middle kernel size, thinner pericarp, middle general combining ability (GCA), and middle resistant to Asia borer in whorling stage and pollen shedding stage. The Tainung No. 5 is uniformly plant height, ear height, plant and ear type,18 cm ear length, 8 row, larger kernel, with white silk color. The ear fresh weight with husk and ear fresh weight are lower than that of Black-pear, the control variety, by 3.61% and 5.85%, respectively. Under 120-150 kg/ha nitrogen level, and 80 × 25 cm planting density, the Tainung No. 5 has higher fresh ear yield and longer ear length