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Rht8、Rht10、Rht12矮杆基因对小麦营养生长和生殖生长发育的影响

DOI: 10.7668/hbnxb.2009.S1.013, PP. 50-53

Keywords: 冬小麦,矮秆基因,近等基因系,营养生长,发育期

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Abstract:

两年、两地的试验结果证明,Rht8半矮秆基因对地上部生物产量较Rht10和Rht12有显著的正向作用,并且生长发育较早,较接近目前推广种的生育时期,对不良环境有较强的适应性,利于产量性状的形成。Rht10的降秆作用最强,但由于节间缩短太多,造成地上部生物产量明显降低,使籽粒形成时提供营养的"源"太少,不利于高产。Rht12矮秆基因的降秆程度显著高于Rht8,但生物产量亦太低、成熟太晚和对环境条件的不适应,影响籽粒产量的提高,在以降秆为主要目标的育种中利用价值较大。

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