排序方式: 共有58条查询结果,搜索用时 15 毫秒
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对4个组合35个香梨F1代单株的花粉发育状况进行了考察,并结合花粉量调查对F1代群体的典型单株进行了花药解剖研究。结果表明:(1)香梨杂种后代的花粉发育类型大致可分为3种类型,即正常发育型、少粒空壳型和完全败育型,其中雄性不育类型(少粒空壳型和完全败育型)占到整个杂交后代株系的42.8%。(2)花药解剖观察显示导致花粉空粒化进而完全解体的主要原因是药壁组织的异常发育。推测梨的雄性不育性可能受1对纯合的隐性基因控制,人为杂交导致的基因重组使隐性基因纯合后在杂交后代中高频率表达;同时发现,其花粉发育也受环境影响,树体的营养状况可影响花粉的发育进程。 相似文献
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光周期诱导光敏感核不育水稻花药蛋白变化的研究 总被引:2,自引:0,他引:2
采用双向电脉技术对不同光周期条件下,光敏感核不育水稻(农垦58s)的可育与不育花药蛋白的变化进行分析,发现花粉发育的不同阶段中,不育花药具有四个特异蛋白pI6.2/bMW70KD,pI6.2/MW68KD,pI6.2/MW38KD和pI7.4/MW37KD.对游离组蛋白的分析表明.长日照诱导的不育花药中游离组蛋白的相对百分率均明显低于短日照下的可育花药.据此推测长日照诱导不百花药蛋白质组成和代谢变化.不育花药中游离组蛋白含量低,可能受DNA合成数量少的影响. 相似文献
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HPGMR农垦58s光敏感期叶片中阳离子过氧化物酶的变化 总被引:1,自引:0,他引:1
以逐垦58s水稻为材料,用分光光度法和聚丙烯酰胺凝胶电泳,分析了58s在10h/d短日照(58s-SD)和自然不育长日照(14.12h/d左右,58s-ND)条件下,育性转换光敏感期,阳离子过氧化物酶活性同工酶的变化。结果表明,在育性转换期阳离子过氧化物酶活性随幼穗发育时期的推进而升高,在ND条件下,酶活性升高更快。在所测定的2上时期中,收丙烯酰胺凝胶电泳图谱可以况58s-SD和58s-ND均有5 相似文献
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Julie A. Glover Katherina C. Blömer Leigh B. Farrell Abdul M. Chaudhury Elizabeth S. Dennis 《Plant Molecular Biology Reporter》1996,14(4):330-342
Although many male-sterile mutants have been identified inArbidopsis thaliana, few of the corresponding genes have been cloned. In order to facilitate cloning of a male sterility gene, 23 of Feldmann's
T-DNA-generated, reduced-fertility lines were screened to identify a tagged male-sterile mutation. Malesterile mutants were
identified, as well as mutants that were both male and female sterile. Segregation of the kanamycin marker gene in the progeny
of 15 of these lines was studied. Forty percent had functional T-DNAs (encoding resistance to kanamycin) inserted at a single
locus, the remainder segregating for two or more functional T-DNA inserts. Linkage between T-DNA inserts and mutant phenotype
was tested for six lines. In three of these lines, mutations were not linked to a T-DNA insert. In three lines, the mutation
segregated with a T-DNA insert. 相似文献
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AARON P. DAVIS JOHN R. BARNETT 《Botanical journal of the Linnean Society. Linnean Society of London》1997,123(4):333-352
The leaf anatomy of the genus Galanthus is described from transverse sections of the leaf and epidermal preparations, with the objective of identifying systematic information. Eight characters are identified as having the potential to provide data for grouping species and subspecies; six of these characters are reported here for the first time. Some of these characters, alone or in combination with other anatomical data, are useful for looking at the relationships between taxbnomically difficult species. Our results are compared with the classifications of Artjushenko, which are based on anatomical and morphological data. 相似文献
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