孢子囊单一的或分叉的不育花丝,尖角状或棒状。北美洲西部的长耳鹿,鹿角的分叉大而尖。
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分叉主轴上的次级旁枝或分岔,如鹿角尖孢子囊单一的或分叉的不育花丝,尖角状或棒状。
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It'sexless , seedless and sterile and can only be bred by growing plants from identical cuttings.
这种香蕉没有性别、没有子也无雌雄蕊,只能从同一株上重复插条繁衍.
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水稻光-温敏雄性不育系化学致死突变体的诱变筛选与初步研究
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Analysing on Combine Ability of Multigerm Male Sterile and O-type Lines in Sugar Beet
甜菜多粒雄性不育系及其保持系的配合力分析
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The difference of restoration degree between K-type and V-type male sterile lines was 5.
本文研究了小麦K、V型两种雄性不育系在恢复度及育性分离方面的差异.
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Clinical study of 145 cases of tubal obstruction sterile induced by drug abortion for nullipara
145例未产妇药物流产致输卵管阻塞性不孕的研究
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So, both the male sterile and artificial emasculation can improve yield.
雄性不育与人工去雄的作用基本一致,都能对制种和大田生产起到增产的效果。
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试验结果表明:松针散斑壳子囊孢子在25%松针煎汁中的萌发率最高,以下依次为2%葡萄糖液、20%马铃薯煮汁、2%蔗糖液、无菌水;
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以WA型广亲和不育系为母本,筛选同质广亲和恢复系;
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Mutant strain hens lacking functional OVR are sterile and display severe hyperlipidemia.
OVR发生突变的蛋鸡,不能繁殖,并且具有严重的高脂血症。
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Observation on Pollen Abortion and Classification of Cytoplasmic Male Sterile Inbred JnA in Maize
玉米细胞质不育系JnA的分组鉴定和花粉败育观察
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Analysis of nutrition and health quality about the pasteurized and sterile milk in Xinxiang City
新乡市全脂巴氏杀菌乳和灭菌乳的营养卫生质量分析
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