| 摘要: |
| 两年中,供试的27个杂种有21个在产量上具有杂种优势,其中10个比双亲增产15%以上,最高增产达45.3%。杂种优势主要表现在千拉重增高,穗子加长,每穗小穗数增多,分蘖力强,抗寒性好,植株增高,抽穗期提平等方面.说明 T 型胞质杂种具有很强的杂种优势。与对照相比,仅有2个杂种超过高产对照,最高增产9.4%。有6个杂种超过两对照平均产量,最高增产17.9%。造成超标优势低的最主要的原因是亲本的产量水平低,加之杂种的育性恢复度不高,成穗率低,植株过高等限制了杂种优势在产量上的充分发挥。 |
| 关键词: 杂种小麦 恢复系 产量水平 平均产量 超标优势 千粒重 不育系 成穗率 杂种优势 双亲 |
| DOI： |
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| STUDIES ON THE HETEROSIS OF T-CYTOPLASMIC HYBR ID WHEAT |
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| Abstract: |
| A total of 27 crosses were studied in two years,of these 21 showed heterosis in grain yield,10 crosses yielded 15% more than the average of both parents, whereas the highest yielding cross gave an yield of 45.3% more than the mid-par- ents.Heterosis are chiefly due to higher 1000 kernel weight,longer spike,larger number of spikelet per spike,strong tillering capacity,better winter-hardiness and earlier maturity.all these shows that hybrid with T-cytoplasm have very hi- gh heterosis.When compared with the ch... |
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