共查询到20条相似文献，搜索用时 78 毫秒
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对10种不同品系萝卜的主要农艺性状、叶绿素含量与单株产量之间的相关性进行研究,旨在揭示其关联程度,为萝卜新品种选育提供理论参考,加快萝卜育种进程。分析结果表明,叶片数、木质部厚、叶绿素a及叶绿素(a+b)含量与单株产量呈正相关,地上部质量、地上部高、根头长度、根颈长、韧皮部厚与单株产量呈负相关。综合相关性分析和通径分析的结果表明,各农艺性状之间的相关和交互作用综合对单株产量产生影响,使得直接通径系数和遗传相关系数的大小不完全相同。本试验认为,木质部厚对萝卜单株产量的贡献最大,且呈显著相关,叶片数对单株产量存在一定的正向影响,根头长度对单株产量有较大的负效应值,且根头长度与单株产量有显著遗传相关性。 相似文献
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潍县青萝卜又称潍县萝卜,是山东名特蔬菜之一,栽培历史悠久,因品质好而素有“水果萝卜”之称。特征特性潍县青萝卜分大缨、小缨、二大缨三个品系,其叶形、根形等基本相似。叶片均属花叶型,叶色深绿;肉质根均呈长圆柱形,地上部占全长的3／4,地下部占1／4,地下部为白色。三个品系植株大小、肉质报地上部皮色、根肉颜色等有较大差异。大缨生长势较强,收获时基生叶14－15片,叶较大,叶长50cm,宽18cm,叶片较厚,茸毛稀疏。肉质根长28－29cm,横径7－9cm,单极重Ikg左右,一般667mz产量5000kg。肉质根地上部皮色为绿色,有光泽,根… 相似文献
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LED灯补光对萝卜生长及光合特性的影响 总被引：2，自引：1，他引：1
为了解发光二极管(LED)补光对植物生长及光合特性的影响,选择萝卜Raphanus sativus 作为材料,将其栽种于2种LED灯补光和温室自然条件下30 d后测定其生长指标及光合特性.结果表明:与自然光相比,使用LED灯补光的萝卜在叶片数、叶片长、宽等指标上并无差异,但有利于肉质根的形成,肉质根鲜重分别增加了5.93 g/株和10.93g/株;LED灯补光使萝卜光补偿点和光饱和点升高,光合能力增强,但胞问二氧化碳浓度、蒸腾速率和气孔导度差异不明显. 相似文献
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韭菜产量性状配合力及其遗传分析 总被引：8，自引：0，他引：8
对韭菜7个亲本及其Griffing完全双列杂交组配的42个杂种F1 的7个性状进行了杂种优势和配合力分析。结果表明: (1) 7个性状均具有一定程度的杂种优势, 超中亲优势的大小顺序为: 鞘长、叶片数>叶长>株高>单株质量>叶宽>鞘粗, 超高亲优势的顺序则为: 叶片数>鞘长、叶长>株高>叶宽、单株质量>鞘粗。(2) 品种天津大金钩、山东大青根、桂林韭、重庆大韭菜具有较好的一般配合力, 是理想的亲本材料。(3) 株高、叶长、叶宽、叶片数和单株质量等5个性状均具极显著的反交效应, 其中株高、叶长和单株质量等3个性状具明显的母体效应。(4) 株高、叶长、单株质量3个性状主要受加性基因和胞质基因共同控制; 鞘长主要受加性基因控制; 叶宽、鞘粗、叶片数则既受加性基因控制又受非加性基因(显性基因和上位性基因) 控制。 相似文献
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雪玉1号是以萝卜核-胞质互作雄性不育系803A为母本，以05-6-8-12为父本配制而成的白萝卜一代杂种。生育期75 d（天），植株开展度66.8 cm，叶片长39.9 cm，宽15.08 cm，主脉白绿色，叶绿色，叶柄绿色，叶片长、倒卵形，叶缘缺刻深，叶面稍皱，有叶刺，短而多；肉质根长圆柱形，皮黄绿色，肉白色，肉质根长48.25 cm，横径10.19 cm，表皮光滑；平均单株质量2.54 kg，肉质根质量2.14 kg，高抗软腐病、黄瓜花叶病毒病和花椰菜花叶病毒病，抗霜霉病和芜菁花叶病毒病，群体整齐度高，每667 m2产量6 000 kg左右，适合在东北、华北、西北地区栽培。 相似文献
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The effects of combinations of salinity (no salt, 2000 p.p.m. or 4000 p.p.m. of CaCl2 and NaCl, 1:1) and water table (30 cm, 60 cm or 90 cm from the soil surface), on the vegetative growth and tolerance of ‘Golden Japanese’ plum and ‘Mit Ghamre’ and ‘Balady’ peaches were studied. The plants were grown in lysimeters. The growth of the trunk, total shoot length, the increase in shoot length per cm and the fresh weight of top, root and total plant were reduced with increasing salinity of the irrigation water. The effect was accentuated when the plants were maintained at high water table level. The salinity treatments resulted in the death of 43%, 73% and 76% of the plants in the plum, and the ‘Mit Ghamre’ and ‘Balady’ peaches, respectively, indicating that the plum is more tolerant to salinity than the peach. The plants of the salinity treatments showed various symptoms of salt injury, such as leaf burn, defoliation, shoot die-back and finally death. In the peaches, salt injury started to occur in the first growing-season, whereas the salt injury appeared in the plum in the second growing-season. The symptoms were more pronounced in the 4000 p.p.m. treatment than in the 2000 p.p.m. treatment and were more pronounced at the high water table level. The salinity level was the predominant factor and the effect of the water table on the vegetative growth diminished with increase in the salinity level of the irrigation water. 相似文献
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AIM：To establish a fast, accurate and economical technique for culturing mouse pulmonary arteriolar smooth muscle cells (PASMCs), and to explore the effects of hypoxia on the proliferation and apoptosis of the PASMCs. METHODS：In sterile condition, the pulmonary artery was isolated from the male BALB/c mice by digesting with collagenase I, and the cells were cultured in fetal bovine serum-coated flask. Centrifugal procedure was not used during the cell passage. The cell morphology was observed under an inverted phase-contrast microscope. α-Smooth muscle actin was identified by immunocytochemistry and immunofluorescence. The effects of hypoxia on the proliferation and apoptosis of the PASMCs were detected by CCK-8 assay and TUNEL assay. RESULTS：PASMCs were identified by the methods of immunocytochemistry, immunofluorescence staining and observation of morphology. Unlike the rat PASMCs with typical subcultured peak-vally pattern, the mouse PASMCs showed a lot different without a peak-vally pattern. The cells could be subcultured after 5 d to 7 d and there was 3 to 5 generations depending on the activity of the cells. CCK-8 assay demonstrated that the A values of PASMCs exposed to hypoxia increased after 24 h (P＜0.05) as compared with normoxia. TUNEL result showed that the apoptotic index of the PASMCs in hypoxia decreased after 24 h (P<0.05). CONCLUSION：This technique for obtaining cultured mouse PASMCs is simple, fast, accurate and economical. The digestion time is easy to control. Hypoxia promotes the proliferation and inhibits the apoptosis of PASMCs. 相似文献
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小檗碱和壳聚糖抗蔬菜病原真菌活性测定及复合膜制备 总被引：2，自引：0，他引：2
研究了小檗碱和壳聚糖对几种常见蔬菜病原真菌的抑制活性,以及以小檗碱和壳聚糖为主料制备复合膜的方法,并测定了该膜的药物释放效果。试验表明:低浓度(0.234 mg/mL)小檗碱即可抑制辣椒炭疽病菌(Vermicularia capsici)等5种蔬菜病原真菌的生长。20 mg/mL浓度壳聚糖对番茄灰霉病菌(Botrytis cinerea)的抑制率高达65%,而对其余4种果蔬病原真菌也有一定的抑制作用。为了集成这2种天然化合物的优点,制备了小檗碱-壳聚糖复合膜,该膜具有缓释功能,在模拟外部环境(磷酸缓冲液,pH 6.8)条件下,20 d小檗碱累计释放率接近25%,提示其在果蔬贮藏抗菌中的应用价值。 相似文献
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钾肥在小白菜和萝卜上的施用效果 总被引：6，自引：0，他引：6
采用盆栽试验方法研究了施用钾肥对小白菜、萝卜生长发育、产量、品质及钾素含量的影响。结果表明 ,施用钾肥对小白菜和水萝卜的株高、叶片数无显著的影响 ,但可提高水萝卜块根的产量 ,提高幅度为 31.0 4 %～ 97.93%。施用钾肥可提高小白菜和萝卜的蛋白质和VC含量 ,降低硝酸盐含量 ,增加植株的钾素含量 相似文献
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Fresh onion seeds desiccated to 6.0% seed moisture content (SMC) were stored in various packaging materials under different storage conditions. Seeds packed in aluminum-laminated pouches beside those stored with silica gel at 25 °C maintained satisfactory germinability and vigour after 12 months. Desiccated seeds stored in moisture impervious containers produced more vigourous seedlings. Germination potential of onion seeds increased with reduced SMC besides storage in moisture impervious packets along with desiccants as physiological and biochemical attributes are regulated. Seed viability and vigour decreased with accelerated ageing due to increased lipid peroxidation, decreased activities of several free radical and peroxide scavenging enzymes. Electrical conductance of seed leachates also increased with ageing. Thus, adoption of appropriate storage temperature and moisture control techniques would significantly affect onion seed quality, which was due to minimum accumulation of free peroxide radicals and enhanced activity of free radical scavenging enzymes. 相似文献
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