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1 建立健全种子繁育体系
采取由科研育种单位建立“三圃”田、原种田繁育原原种、原种，或由育种家种子直接繁育原种，由具备种子生产资格的单位建立小麦专业化种子生产基地，扩繁良种销售给农户，按照这个繁育体系生产的小麦种子就能有效地保证种子纯度。…… 相似文献
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玉米亲本种子的繁殖和使用应与国际接轨,采用以育种者种子为种源基础的"四级生产程序"和育种者种子→原原种→原种→良种的四个类别进行生产,并逐步建立专门从事亲本繁殖生产的专一机构和"株系循环法"技术为基础的提纯保种圃、低温低湿库贮存的双重保种制度. 相似文献
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1 建立种子繁殖基地和合理的良种繁育体系
采用由科研育种单位或良种场建立的"三圃田",原种田繁育原原种、原种,或由育种家种子直接繁育原种,由种子专业农场或专业承包户生产良种,种子部门进行良种生产安排、种子检验、收购,扩繁提供优质种子给农户;各级种子部门要加快种子繁殖基地建设,抓好基地技术培训,农田基础设施建设,隔离区域的设置等工作,建立相对稳定的繁殖基地. 相似文献
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浅谈农作物原种种子来源及生产条件 总被引：1，自引：0，他引：1
1 原种的来源
1．1 由育种家种子生产原种
其优点是最能有效的保持原品种的特性。缺点是数量少，满足不了生产上的用种需要；利用的周期短，原因是最初的一批种子，不能被长时间利用。 相似文献
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脱毒甘薯工厂化四级程序繁育技术 总被引：2，自引：0，他引：2
脱毒甘薯工厂化四级程序繁育技术是指利用茎尖分生组织,在无病毒条件下大量培养培育脱毒种苗,从茎尖组织培养到大田种苗按繁育种苗世代高低和质量标准等分成四级,即高级脱毒苗(育种家种子)、脱毒原原种苗(原原种)、脱毒原种苗(原种)、脱毒良种苗(良种),而脱毒良种苗应用于生产的主要形式是统一供种.其关键技术如下. 相似文献
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Combining ability of seed vigor and seed yield in soybean 总被引：4，自引：0，他引：4
Studies have shown no consensus in relationships between seed yield and vigor in soybean [Glycine max (L.) Merrill]. The lack of information regarding the inheritance of seed vigor prompted this study to determine the types
of gene action and combining ability estimates for seed vigor and its related traits. Five high and six low seed vigor soybean
genotypes were crossed in a diallel, and selfed to produce 55 F2 progenies, which were examined, along with the parents, for seed vigor, yield, and seed weight. Significant genotype and
environment effects were found for seed vigor and yield. General combining ability (GCA) effects for seed vigor and seed yield
were significant (p≤ 0.01) and larger than specific combining ability (SCA) effects. Significant GCA and SCA effects were found for seed weight,
indicating that both additive and non additive genetic effects were involved in conditioning seed weight. The ratios of mean
square, 2GCA / (2GCA+SCA), were 0.96 for seed vigor and 0.93 for seed yield. These ratios indicated that additive gene effects
were more important than non additive gene effects for seed vigor and seed yield in these crosses. Mean seed vigor(83.8%),
as determined by accelerated aging germination, and mean seed yield (2,155 kg ha-1)in high vigor × high vigor crosses were higher than the high vigor × low vigor and low vigor × low vigor crosses. Mean percent
accelerated aging germination rates in F2 populations from diallel crosses were significantly related to mid-parent seed vigor(r2 = 0.52**) and midparent seed size (r2 = 0.31**). These results indicated that levels of seed vigor can be improved through breeding, while maintaining high yields because
of the predominance of GCA effects in both seed vigor and seed yield.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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Chickpea, Cicer arietinum L., is a staple protein source in many Asian and Middle Eastern countries. Hence, the mineral content of its seed, especially that of calcium, is of nutritional importance. Calcium is transported through plants and to legume pods almost exclusively via the xylem stream, with Ca accretion in developing seeds resulting primarily from diffusion of Ca from the adjoining pod wall. Thus, for seeds of differing surface‐to‐mass ratios, Ca concentration is expected to correlate inversely with seed weight. The relationship between seed weight and Ca concentration in chickpea seeds was studied using a range of germplasm and derivatives from crosses between types differing in seed Ca concentration. Among the cultivars tested, low seed mass was associated with high Ca concentration. However, the study of hybrid progeny indicated that seed Ca content was mainly determined by genetic factors other than grain weight genes. This finding may assist in future breeding of high nutritional quality chickpea cultivars. 相似文献
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提高小麦繁种基地种子质量的措施 总被引：1，自引：1，他引：0
小麦是我国重要的粮食作物,在粮食作物中占有主要地位,播种面积和总产均居首位.近年来,随着生产水平提高,小麦产量增长较快,一批批新良种的选育和推广使小麦生产再上一个新台阶,小麦良种的繁育工作随着人民生活水平的提高和商品经济的发展也越来越重要.为保证小麦良种繁育基地的种子生产加工质量,根据国家相关法规标准及管理制度要求,结合小麦良种生产基地现状和本人基地工作经验总结如下,以供小麦繁种基地参考. 相似文献
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随着种子市场的活跃和发展,扩大销售、追求利润成为企业管理的首要任务。在经营过程中,大家的注意力重点集中在市场的研发上,对优质种子的生产关注不是很多,忽视了经营的基础是优质的种子。种业要想在价格竞争中取胜,首先要降低种子生产成本,分散生产风险,增强种子竞争的价格比较优势。目前安徽种业种子生产面临着四川、江苏种业的强劲挑战,面对入世与挑战,如何发展种子生产,值得关注和探讨。1种子生产现状目前,我省种子公司的生产制种,采取“公司+农户”的生产模式。这种生产模式能确保公司种子来源稳定,增加农民收入,具有一定积极意义。但… 相似文献
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Arachis glabrata Benth, variety glabrata coll. GK 10596 (PI 276233; ICG8176) belonging to section Rhizomatosae has multiple disease resistance. Fertile hybrids between A. hypogaea L. and A. glabrata, A. duranensis Krapov & W.C. Gregory and A. glabrata and A. diogoi Hoehne and A. glabrata were produced. Introgression of DNA from A. glabrata into A. hypogaea, A. duranensis and A. diogoi was analyzed by isozyme and RAPD analyses. Hybrids were backcrossed and BC1 seeds were obtained in all the three hybrids. Hybrids were evaluated for the transfer of disease resistance genes from A. glabrata, which was confirmed. RAPD analysis with several primers showed that DNA fragment pattern were not simply represented, instead
there were new bands and several parental bands were absent in the interspecific derivatives.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
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种子是农业生产最重要的有生命的生产资料。种子检验是良种繁育的重要环节,其质量标准化和品质标准化是种子安全贮藏的重要保证,种子公司通过种子检验可以测定其种用价值和制定合理的价格,同时也可以及时发现种子质量问题,及时采取补救措施,使种子达到质量标准。我国在种子质量检验方面有专业的《农作物种子质量检验规程》和《农作物种子质量标准》,同时《中华人民共和国种子法》明确规定:种子公司在申请办理种子经营许可证时,必须配备经省级及省级以上检验机构培训、合格后并取得检验员证的种子质量检验员,有相应的检验场所及相关的种子质… 相似文献
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Because preharvest sprouting decreases quantity and quality of wheat grain, researchers need effective protocols to assess
response to preharvest sprouting conditions. The aim of this study was to determine which temperature gives the greatest difference
in seed germination and expression of seed dormancy in 10 spring wheat genotypes. The genotypes were grown in the field near
Swift Current, Saskatchewan in 2000 in a randomized complete block with four replicates. Seed samples were harvested at approximately
25% moisture content (wet weight basis) and dried to 12% moisture content with minimal after-ripening. Germination was under
controlled environment at temperatures of 10, 15, 20 and 30 °C in darkness. A weighted germination index (WGI) was calculated.
The analysis of WGI, for each temperature, showed highly significant (p ≤ 0.01) genotype effects on germination. Most genotypes decreased in WGI (increased dormancy) as temperature was increased
from 10 to 30 °C. The greatest differences in seed germination tended to be at 15 °C and 20 °C. The level of seed dormancy
depended on the genotype and germination temperature.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
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目前，外国种子公司主要通过来华开发推广其优良品种或投资设立合资种子生产经营企业，进入我国种子市场。也就是说，外国种子公司进目前，外国种子公司主要通过来华开发推广其优良品种或投资设立合资种子生产经营企业，进入我国种子市场。也就是说，外国种子公司进入我国种业的途径主要是品种进入和资本进入。１品种进入国外品种进入我国开发推广，需遵循以下基本程序和要求。１．１引种试验引种试验即从国外引进少量种子进行隔离试种，要求种子输出国家和地区没有发生我国检疫性病虫草害，即没有发生《中华人民共和国进境植物检疫危险性病… 相似文献