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1 掌握父母本特征特性,合理安排播差期配组 K 优5号母本叶色深绿,株型紧凑,叶片窄,剑叶短挺,主茎叶片数12.5~13叶,株高70cm 左右,分蘖力较弱,播始历期69~71d,开花习性好,柱头外露率高,包颈程度低,对“九二○”较敏感,异交结实率度。父本多系1号株高100cm 左右,分蘖力强,花粉量大,花期长,主茎叶片数16.5~17叶,幼穗分化始于13叶,播始历期120~122d。根据制种地气候特点,把父本多系
1 master parents characteristics of the characteristics of a reasonable arrangement of broadcast sowing group K You 5 mother dark green leaf color, plant compact, narrow leaves, short leaves, the main stem leaves 12.5 to 13 leaves, plant height 70cm , Tillering ability is weaker, the earning duration is 69-71d, the flowering habit is good, the stigma exsertion rate is high, the degree of package neck is low, more sensitive to “920” and outcrossing rate. Parents and more lines on the 1st plant height of about 100cm, strong tillering ability, large amount of pollen, long flowering, the main stem leaf number 16.5 to 17 leaves, panicle differentiation began in 13 leaves, the initial duration of 120 ~ 122d. According to the characteristics of the climate system, the father of more lines