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1.
77—34是辽宁省果树研究所在1977年以M9为母本、小黄海棠为父本，采取有性杂交育成的苹果矮化砧木。1999年经专家鉴定认为达到国际先进水平，2000年获得辽宁省政府科技进步二等奖。一、主要生物学性状1.矮化性明显用山定子做砧木，77—34做中间砧，10年生国光树树高290厘米，冠径323厘米×293厘米，矮化程度同半矮化砧木M7相近，表明77—34属于半矮化砧木。2.亲和性特好在不同地区用山定子(辽宁)、丽江山定子(四川)、黄海棠(内蒙古)、八楞海棠(山西)和新疆野苹果(新疆)做基砧嫁接77—34，中间砧平均成活率高达97.7%;用77—34做中间砧，在辽… 相似文献
2.
77—34是辽宁省果树所通过有性杂交途径选育出的苹果抗寒矮化砧木,于1995年11月通过省农作物品种委员会审定。77—34比M系砧木有较强的抗寒性,在1985～1986年和1993～1994年两次大冻害中,均没有发生冻害;在北纬43.3°,年均气温为5℃的吉林公主岭地区能安全越冬。77—34比M系砧木有较 相似文献
3.
77-34是由辽宁省果树科学研究所以M9为母本,以小黄海棠为父本,采取有性杂交方法育成的新型苹果矮化砧木,具有矮化、早果、丰产、苗木整齐、出圃率高、亲和性好、抗逆性强、适应性广等诸多优点,达到国际先进水平,已通过辽宁省农作物品种审定. 相似文献
4.
77—34是由辽宁省果树科学研究所以M9为母本，以小黄海棠为父本，采取有性杂交方法育成的新型苹果矮化砧木，具有矮化、早果、丰产、苗木整齐、出圃率高、亲和性好、抗逆性强、适应性广等诸多优点，达到国际先进水平，已通过辽宁省农作物品种审定。 相似文献
5.
辽宁省果树研究所选育出的苹果矮化砧木77-34,矮化性能与M7相近,属于半矮化砧木.用77-34与山定子、海棠、国光、富士等品种嫁接,成活率都在90%以上,尚未发现劈裂、折断、树体早衰等不亲和现象,有很好的亲和力.以77-34做中间砧的苹果树3 a开始结果,6 a进入盛果期,产量高于对照M7及M26为中间砧的树.77-34有较好的生根性能.组培生根率为87%～90%,略低于M26.77-34有比M26砧木更强的抗寒能力.在1月份平均气温达-16.2℃以上的地区均能露地安全越冬,用枝条电导法测定该砧木休眠枝条的半致死低温达-53℃.77-34在长江以北(北纬35°～45°)的广阔的地域,均能正常生长发育,显示出对自然条件很强的适应能力. 相似文献
6.
77—34是由辽宁省果树研究所在1977年以M_9为母本,用小黄海棠做父本,通过有性杂交,育成的新型苹果矮化砧木。它具有矮化、早果、丰产、苗木整齐、出圃率高、亲和性好、抗逆性强和适应性广等特点。已于1995年通过辽宁省农作物品种审定委员会审定,1999年经专家鉴定认为达到国际先进水平。 相似文献
7.
多年来笔者对矮化砧和矮化中间砧印象不好,主要是不抗旱、不抗风.如以77-33、77-34作中间砧的树越长越歪,结果树雨季还容易倒伏.但是以77-34作中间砧的'麦艳B'却能早产、丰产、稳产.
2003年笔者引进'麦艳B'苹果接穗,6月份嫁接在77-34中间砧上,2004年定植600株,面积0.67 hm2.同时栽植乔砧'麦艳B'苗木50株,对比砧木对'麦艳B'苹果产量的影响.…… 相似文献
8.
1 辽宁省苹果矮化砧木利用现状
1.1 苹果矮砧栽培现状
辽宁省苹果矮砧栽培开始于1965年,曾在大连、营口、葫芦岛等地尝试发展,但由于冻害、适应性及管理因素等原因,没有形成栽培规模.目前,辽宁省苹果矮砧栽培总面积约为0.97万hm2,占全省苹果栽培总面积的3.81％.其中10年生以上矮砧果园不足20 hm2,4～6年生矮砧果园0.05万hm2,3年生以下矮砧果园0.9万hm2,主要集中在沈阳市及周边地区.辽宁省应用的矮化砧木主要有GM256、77-34、辽砧2号、MAC9、M26等,利用方式均为中间砧,基砧为山定子.嫁接方法以芽接为主,苗木为2年出圃的快苗,栽培株行距为2～3 m×3～4 m. 相似文献
9.
正1锦绣海棠灯塔市位于辽宁中部,试栽地位于灯塔市最北边的沈旦镇,与沈阳市苏家屯区交界,北纬41°36',东经122°51'。年平均气温8.5℃,1月份平均气温-12.5℃,极端最低温-32.9℃,年降雨量772.9 mm,≥10℃积温3 400℃以上。因气候条件不适,辽宁省中北部地区没有中晚熟的优质苹果品种,2010年春笔者从通辽林科所引进乔砧‘锦绣海棠’苗50株,以株行距3 m×3 m栽植于沈旦镇沈旦村的示范园。通辽年平均气温5.8℃,1月 相似文献
10.
不同砧穗组合对苹果苗木生长的影响 总被引：1，自引：0，他引：1
《中国果树》2020,(4)
对辽宁省果树科学研究所选育的苹果品种'岳冠'岳阳红'望山红'与4种矮化砧木嫁接后的苗木生长情况进行调查。测定2年生矮化自根砧苗木的侧根数、苗木粗度、分枝情况、苗木高度、成活率等指标,并参考苹果苗木国家标准进行苗木等级划分。综合对比各矮化自根砧苗木,岳冠/GM256、岳阳红/GM256、岳阳红/M9T337、望山红/GM256 4个砧穗组合的苗木高度、苗木粗度、分枝情况、成活率及成苗情况优于同期的其他砧穗组合。 相似文献
11.
AIM: To examine the autoantibody against α1-adrenoceptor and its biologic activities during the development of renal hypertension. METHODS: Renal hypertension of rat was achieved by clipped renal artery, the titre of autoantibody to α1-adrenoceptor was detected using ELISA immunoassay. Furthermore, the biological offects of these autoantibodies on cultured cardiomyocytes were also examined. RESULTS: After two weeks of clipping renal arteries, both the frequency of occurrence and the titre of autoantibodies to cardiac α1-adrenergic receptor were significantly increased as compared with the control of pre-treatment. The increased autoantibodies lasted for several weeks and then automatically decreased gradually to the pre-clipping level at 12 weeks. The biological effects of these autoantibodies displayed an "agonistic-like" activities on the beating frequency of cultured neonatal cardiomyocytes. CONCLUSION: Autoantibodies against α1-adrenoceptor may play a role in the elevation of peripheral vascular resistance and in the development of cardiac hypertrophy in rats with renal hypertension. 相似文献
12.
AIM: Although endovascular radiotherapy inhibits neointimal hyperplasia, the exact alterations induced by β-particles irradiation remain to be elucidated. The objective of this study was to investigate the ability and the cellular mechanism of local β-particles emission from 188Re to inhibit vascular smooth muscle cells (SMCs). METHODS: The SMCs in vitro were irradiated by 188Re with single doses of 2.6 Gy-25.8 Gy. The effects of β-particles on SMCs, such as effective irradiate doses, the period of inhibition for SMCs proliferation, the changes of cell proliferation rate and DNA synthesis rate, cell cycle progression and related gene expression, were investigated by cell count, [3H]-TdR incorporation, cell cycle progression analysis, cell viability and immunocytochemistry, respectivecy. RESULTS: β-particles irradiation with dose of 5.2 Gy could inhibit significantly SMCs proliferation. At dose of 20.6 Gy DNA synthesis inhibitory rate was 92%, SMCs proliferation rate was only 3%. Renoval of 188Re did not abolish the inhibitory effects of β-particles on SMCs proliferation. The expression of P53 was up regulation and PCNA was down regulation after irradiation. CONCLUSION: β-particles from 188 Re was significantly effective and permanent in inhibiting SMCs proliferation, and inhibitory effect was in dose-dependet manner ED50was 5 Gy, the best dose to inhibit SMCs proliferation was 20 Gy. β-particles irradiation induced SMCs to occur G0/G1 arrest, damaged the ability of SMCs reproliferation and led to cell clonogenic death. P53 and PCNA had regulatiory effects on SMCs proliferation after β-particles irradiation. 相似文献
13.
《International Journal of Fruit Science》2013,13(1):139-156
Abstract This review is based partly on complete articles and partly on abstracts. Three of the 60 articles deal with the total uptake of elements in strawberry plant organs in two different strawberry production systems, both considered as optimal concerning amount and balance of elements. The effect on fruit quality may be dramatic if the level of a particular element is outside this range, but there may also be effects initiated by differences within the optimal range of elements. Most articles refer to product oriented quality, but some focus on consumer oriented quality, as discussed by Shewfelt (1999). The discussion here is on a general basis, so one should keep in mind that there are cultivar differences and that specification of nutrition ideally should mirror the needs of a single cultivar, or a group of cultivars with similar requirements. Also, to get a complete understanding of the subject future reviews should embrace a broader access of information including the effect on plant development of individual elements, such as the role of calcium in fruit firmness and its importance in cell wall structure. However, the intention here is to narrow the information to results that suggest a direct connection between nutrient uptake and fruit quality. 相似文献
14.
AIM:To study the effect of L-Arg on plasma content of endothelin (ET) and the expression of proto-oncogene c-fos mRNA in the left ventricle of rats with renovascular hypertensive hypertrophy. METHODS: The level of c-fos mRNA were measured by in situ hybridization. The ET in plasma were measured by radioimmunoassay. RESULTS:After eight weeks of treatment with L-Arg, the expression of c-fos decreased markedly (P＜0.01). The ET content in plasma also decreased significantly by L-Arg(P＜0.01).CONCLUSION: Plasma ET content and the expression of c-fos in the left ventricle of rats with renovascular hypertensive hypertrophy could be decreased by L-Arg administration. 相似文献
15.
Fulé Peter Z. Crouse Joseph E. Heinlein Thomas A. Moore Margaret M. Covington W. Wallace Verkamp Greg 《Landscape Ecology》2003,18(5):465-486
Fire regime characteristics of high-elevation forests on the North Rim of the Grand Canyon, Arizona, were reconstructed from fire scar analysis, remote sensing, tree age, and forest structure measurements, a first attempt at detailed reconstruction of the transition from surface to stand-replacing fire patterns in the Southwest. Tree densities and fire-/non-fire-initiated groups were highly mixed over the landscape, so distinct fire-created stands could not be delineated from satellite imagery or the oldest available aerial photos. Surface fires were common from 1700 to 1879 in the 4,400 ha site, especially on S and W aspects. Fire dates frequently coincided with fire dates measured at study sites at lower elevation, suggesting that pre-1880 fire sizes may have been very large. Large fires, those scarring 25% or more of the sample trees, were relatively infrequent, averaging 31 years between burns. Four of the five major regional fire years occurred in the 1700s, followed by a 94-year gap until 1879. Fires typically occurred in significantly dry years (Palmer Drought Stress Index), with severe drought in major regional fire years. Currently the forest is predominantly spruce-fir, mixed conifer, and aspen. In contrast, dendroecological reconstruction of past forest structure showed that the forest in 1880 was very open, corresponding closely with historical (1910) accounts of severe fires leaving partially denuded landscapes. Age structure and species composition were used to classify sampling points into fire-initiated and non-fire-initiated groups. Tree groups on nearly 60% of the plots were fire-initiated; the oldest such groups appeared to have originated after severe fires in 1782 or 1785. In 1880, all fire-initiated groups were less than 100 years old and nearly 25% of the groups were less than 20 years old. Non-fire-initiated groups were significantly older (oldest 262 years in 1880), dominated by ponderosa pine, Douglas-fir, or white fir, and occurred preferentially on S and W slopes. The mixed-severity fire regime, transitioning from lower-elevation surface fires to mixed surface and stand-replacing fire at higher elevations, appeared not to have been stable over the temporal and spatial scales of this study. Information about historical fire regime and forest structure is valuable for managers but the information is probably less specific and stable for high-elevation forests than for low-elevation ponderosa pine forests.This revised version was published online in May 2005 with corrections to the Cover Date. 相似文献
16.
《International Journal of Fruit Science》2013,13(3):101-120
Abstract Saskatoon berry (Amelanchier alnifolia Nutt., Rosaceae) and blueberry (Vaccinium corymbosum L., Ericaceae) are substantially equivalent in all characteristics that are important to the consumer, including fruit color, shape, size, nutrition, texture, and uses. In addition, both fruits are native to North America and they have practically identical historical uses and known health benefits. Their composition, processing, nutritional value and metabolism, intended uses, and levels of undesirable substances are compared. 相似文献
17.
以西双版纳黄瓜和‘华黄5号’黄瓜叶片为试验材料,研究了衰老过程中两种黄瓜叶片叶绿素含量变化及脱镁叶绿素脱镁叶绿酸水解酶基因PPH和脱镁叶绿酸a加氧酶基因PAO的表达。结果表明：随着叶片衰老,叶绿素a和叶绿素b含量显著降低,叶绿素a与叶绿素b的比值在0.5左右,推测叶绿素b的含量可能对黄瓜叶片保绿起到重要作用。荧光定量RT-PCR分析结果显示：PPH和PAO在西双版纳黄瓜叶片生长35 d时表达量最高,分别为5.50和1.86;PPH在‘华黄5号’叶片35 d时表达量最高,为7.14,而PAO在35和45 d表达量都很高,分别为3.90和3.91;PPH和PAO在西双版纳黄瓜叶片中的表达量低于在‘华黄5号’中。 相似文献
18.
AIM:To observe the effect of simvastatin on the proliferation of vascular smooth muscle cells(VSMCs) induced by serum and growth factor PDGF-BB and the effect of simvastatin on the expression of PTEN,a important regulator of G1/S cell cycle transition. METHODS:The DNA synthesis was determined by [3H]-TdR incorporation, cell cycle was examined with flow cytometry, the protein level of PTEN was measured by Western blot method. RESULTS: (1)Simvastatin inhibited [3H]-TdR incorporation in a dose dependent manner. (2) Flow cytometric DNA analysis revealed that simvastatin induced significantly enhancement of G0/G1 phase and decrease in S phase VSMCs.(3)Simvastatin increased protein level of PTEN and mevalonate, a metabolite of HMG-COA, reversed the effect of simvastatin on PTEN protein expression. CONCLUSION:Simvastatin may inhibit proliferation of VSMCs and retarded cell cycle in G0/G1 phase by increasing PTEN expression through inhibiting synthesis of mevalonate. 相似文献
19.
A two-year field study investigated the possible effects of grain sorghum (Sorghum bicolor [L.] Moench) and uncultivated areas on the abundance of generalist predators in commercially-managed cotton (Gossypium hirsutum L.) fields in Texas, USA. From 63 to 70 fields were sampled for pests and predators over nine consecutive weeks during early stages of cotton development. Additional data on agronomic practices and landscape composition at three spatial scales were also collected for each field. Stepwise regression analyses were used to determine the relationships of landscape, agronomic and prey variables to the abundance of generalist predators. Because the variables most closely linked to predator levels could vary over time, separate regressions were conducted for three time periods corresponding to stages of grain sorghum growth (half-bloom, hard-dough, maturity) in each year. Significant relationships between predator abundance and agricultural landscape composition appear in both years and in all three time periods, but the specific relationships of landscape variables to cotton predator levels differed between and within years. At maturity in 2001, predator levels rose as the amount of uncultivated land from 1.6 to 3.2 km distant and the perimeter shared with grain sorghum increased. During 2002, the area of grain sorghum (half-bloom) and uncultivated land (hard-dough) within 1.6 km of cotton fields were both positively related to predator numbers. Cotton planting dates and the abundance of cotton fleahoppers (Pseudatomoscelis seriatus [Reuter]) were also strongly linked to predator numbers during both years. Results suggest that the total amount of grain sorghum or uncultivated land in an area is more important than the presence of these habitats adjacent to cotton fields, and that landscape composition may sometimes be the most important factor in determining predator abundance. 相似文献
20.
The objective of this study was to establish a cryopreservation protocol for hawthorn shoot apices (Crataegus pinnatifida Bge.). Cryopreservation was carried out via encapsulation–dehydration, vitrification, and encapsulation–vitrification on shoot apices excised from in vitro cultures. We began by showing that cold-acclimation enhanced the regrowth of cryopreserved apices from 10.0 to 65.5% in encapsulation–dehydration. We then decided that the encapsulation–dehydration method was an optimal cryopreservation method for hawthorn shoot apices in terms of its high recovery after cryopreservation as well as its ease of use compared with vitrification and encapsulation–vitrification. In encapsulation–dehydration, the protocol leading to optimal regrowth was as follows: after cold-acclimation at 5 °C in the dark for 2 weeks, excised shoot tips were pretreated for 24 h at 25 °C on hormone-free Murashige and Skoog [Murashige, T., Skoog, F., 1962. A revised medium for rapid growth and bioassays with tobacco tissue culture. Physiol. Plant. 15, 473–497] (MS) basal medium with 0.4 mol/L sucrose, then encapsulated and precultured in liquid MS medium with 0.8 mol/L sucrose for 16 h at 25 °C. Precultured beads were dehydrated for 6 h at 25 °C in the dessicator containing 50 g silica gel to a moisture content of 15.3% (fresh-weight basis) before cryostorage for 1 h. In addition, we examined the effect of adding glycerol to both the alginate beads and loading solution to enhance regrowth after cryopreservation in encapsulation–dehydration. In the present study, it was shown that adding 0.5 mol/L glycerol resulted in high regrowth percentages (82.5–90.0%) in four Crataegus species. 相似文献