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一、根据当地生态和生产条件,确定育种主攻方向和目标 (一)主攻方向:选育抗稻瘟病高产品种是我区早稻育种的主攻方向。 (二)育种目标: 1.生育期: 双季早稻以全生育期110—120天为宜,这类型品种有利于充分利用早季光热资源,有利于双晚杂交水稻适时扦秧,夺取两季平衡高产。 2.秆高与株型。以矮秆为基础,配置综合高产株型。新的高产品种应具有:(1)矮杆、秆硬,基部节密,茎杆韧性好,耐肥抗
First, according to local ecological and production conditions, to determine the main breeding direction and goals (a) the main direction: breeding high-yielding varieties of blast resistance is the main direction of early rice breeding in our region. (B) Breeding objectives: 1. Growth period: Double-season early rice to the whole growth period of 110-120 days is appropriate, this type of species is conducive to making full use of early light and heat resources, is conducive to double-late hybrid rice timely sprout seedlings, Quarter of balanced high yield. 2. Stalk height and plant type. Based on dwarf, configure comprehensive high-yielding plant type. The new high-yielding varieties should have: (1) dwarf bar, straw hard, basal section of the dense stem good toughness, resistance to fat