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南选一号不育系,是用75—76年望谟南繁育种队在广东崖县南繁时,从恢复系—IR24的早熟变异株中穗系选育的,南选一号这个常规种与珍汕97A等不育系杂交,并连续回交转育成的新不育系。目前回交的代数是B_4,其性状已与南选一号相似,不育性状已整齐稳定,并且用早恢一号、圭六三○、IR661、七选一号(选自75P12的变异株)等恢复系和恢复材料对它的可恢复性和杂种优势进行了初步测定。下面就将这个新不育系的选育经过和它的可恢复性及杂种优势的初步测定以及它本身的性状初报如下:
Southern selection of a sterile line, is 75-76 Wangmian South breeding team in the South Cliff, Guangdong Province, from the restorer line-IR24 precocious mutation in the panicle breeding, the South election on the 1st of this conventional And Zhenshan 97A other sterile lines, and continuous backcross breeding into a new sterile line. At present, the backcrossed algebra is B_4, and its trait has been similar to that of the south one. The sterility trait has been neatly and steadily, and the mutants of early restorer, Gui630, IR661, ) And other restorer lines and restoration of its recoverability and heterosis were initially determined. The following will be the new sterile line of breeding and its recoverability and heterosis preliminary determination as well as its own characteristics are as follows: