全文获取类型
收费全文 | 95篇 |
免费 | 6篇 |
专业分类
林业 | 6篇 |
农学 | 47篇 |
基础科学 | 4篇 |
12篇 | |
综合类 | 1篇 |
农作物 | 5篇 |
水产渔业 | 2篇 |
畜牧兽医 | 16篇 |
园艺 | 1篇 |
植物保护 | 7篇 |
出版年
2022年 | 2篇 |
2021年 | 1篇 |
2020年 | 2篇 |
2019年 | 11篇 |
2018年 | 4篇 |
2017年 | 2篇 |
2016年 | 8篇 |
2015年 | 6篇 |
2014年 | 5篇 |
2013年 | 6篇 |
2012年 | 5篇 |
2011年 | 9篇 |
2010年 | 8篇 |
2009年 | 2篇 |
2008年 | 4篇 |
2007年 | 6篇 |
2006年 | 4篇 |
2004年 | 3篇 |
2003年 | 2篇 |
2001年 | 2篇 |
2000年 | 1篇 |
1999年 | 1篇 |
1998年 | 2篇 |
1997年 | 1篇 |
1993年 | 1篇 |
1987年 | 1篇 |
1980年 | 1篇 |
1979年 | 1篇 |
排序方式: 共有101条查询结果,搜索用时 15 毫秒
31.
Murali Mohan Sabbavarapu Mamta Sharma Siva Kumar Chamarthi Nayakoti Swapna Abhishek Rathore Mahendar Thudi Pooran Mal Gaur Suresh Pande Sarvjeet Singh Livinder Kaur Rajeev Kumar Varshney 《Euphytica》2013,193(1):121-133
Fusarium wilt (FW) and Ascochyta blight (AB) are two important diseases of chickpea which cause 100 % yield losses under favorable conditions. With an objective to validate and/or to identify novel quantitative trait loci (QTLs) for resistance to race 1 of FW caused by Fusarium oxysporum f. sp. ciceris and AB caused by Ascochyta rabiei in chickpea, two new mapping populations (F2:3) namely ‘C 214’ (FW susceptible) × ‘WR 315’ (FW resistant) and ‘C 214’ (AB susceptible) × ‘ILC 3279’ (AB resistant) were developed. After screening 371 SSR markers on parental lines and genotyping the mapping populations with polymorphic markers, two new genetic maps comprising 57 (C 214 × WR 315) and 58 (C 214 × ILC 3279) loci were developed. Analysis of genotyping data together with phenotyping data collected on mapping population for resistance to FW in field conditions identified two novel QTLs which explained 10.4–18.8 % of phenotypic variation. Similarly, analysis of phenotyping data for resistance to seedling resistance and adult plant resistance for AB under controlled and field conditions together with genotyping data identified a total of 6 QTLs explaining up to 31.9 % of phenotypic variation. One major QTL, explaining 31.9 % phenotypic variation for AB resistance was identified in both field and controlled conditions and was also reported from different resistant lines in many earlier studies. This major QTL for AB resistance and two novel QTLs identified for FW resistance are the most promising QTLs for molecular breeding separately or pyramiding for resistance to FW and AB for chickpea improvement. 相似文献
32.
Nalini Mallikarjuna Kulbushan Saxena Jhansi Lakshmi Rajeev Varshney Sandhya Srikanth Deepak Jadhav 《Genetic Resources and Crop Evolution》2012,59(3):411-417
A study was undertaken to know the difference/diversity between pigeonpea and its closely related wild species C. cajanifolius by studying their morphology, crossability, cytology of the hybrid between the two, and molecular studies. Studies revealed
that there are at least 5–6 traits that separate the two species such as flower morphology, pod color and morphology, pod
constriction, seed color and strophiole, 100 seed weight that separate C. cajan from C. cajanifolius. Molecular studies revealed that a genetic dissimilarity index value ranging from 0.81 to 0.94 exists between the two species. 相似文献
33.
34.
Seleman R. Kaoneka Rachit K. Saxena Said N. Silim Damaris A. Odeny Nadigatla Veera Prabha Rama Ganga Rao Hussein A. Shimelis Moses Siambi Rajeev K. Varshney 《Plant Breeding》2016,135(2):148-154
Pigeonpea (Cajanus cajan [L.] Millspaugh) is an important multipurpose grain legume crop primarily grown in tropical and subtropical areas of Asia, Africa and Latin America. In Africa, the crop is grown for several purposes including food security, income generation, livestock feed and in agroforestry. Production in Eastern and Southern Africa (ESA) is however faced with many challenges including limited use of high‐yielding cultivars, diseases and pests, drought, under‐investment in research and lack of scientific expertise. The aim of this review is to highlight the challenges facing pigeonpea breeding research in ESA and the existing opportunities for improving the overall pigeonpea subsector in the region. We discuss the potential of the recently available pigeonpea genomic resources for accelerated molecular breeding, the prospects for conventional breeding and commercial hybrid pigeonpea, and the relevant seed policies, among others, which are viewed as opportunities to enhance pigeonpea productivity. 相似文献
35.
QTLs for chlorophyll and chlorophyll fluorescence parameters in barley under post-flowering drought 总被引:6,自引:1,他引:5
Peiguo Guo Michael Baum Rajeev K. Varshney Andreas Graner Stefania Grando Salvatore Ceccarelli 《Euphytica》2008,163(2):203-214
Drought is one of the major factors limiting barley yields in many developing countries worldwide. The identification of molecular
markers linked to genes controlling drought tolerance in barley is one way to improve breeding efficiency. In this study,
we analyzed the quantitative trait loci (QTL) controlling chlorophyll content and chlorophyll fluorescence in 194 recombinant
inbred lines (RILs) developed from the cross between the cultivar ‘Arta’ and Hordeum spontaneum 41-1. Five traits, chlorophyll content, and four chlorophyll fluorescence parameters, namely initial fluorescence (Fo), maximum fluorescence (Fm), variable fluorescence (Fv), and maximum quantum efficiency of PSII (Fv/Fm) which are related to the activity of the photosynthetic apparatus, were measured under well-watered and drought stress conditions
at post-flowering stage. QTL analysis identified a total of nine and five genomic regions, under well-watered and drought
stress conditions, respectively, that were significantly associated with the expression of the five target traits at post-flowering
stage. No common QTL was detected except one for chlorophyll content, which was identified in both growth conditions, demonstrating
that the genetic control of the expression of the traits related to photosynthesis differed under different water conditions.
A QTL for Fv/Fm, which is related to the drought tolerance of photosynthesis was identified on chromosome 2H at 116 cM in the linkage map
under drought stress. This QTL alone explained more than 15% of phenotypic variance of maximum quantum yield of PSII, and
was also associated with the expression of four other traits. In addition, another QTL for Fv/Fm was also located on the same chromosome (2H) but at 135.7 cM explaining around 9% of the phenotypic variance under drought
conditions. The result presented here suggest that two major loci, located on chromosome 2H, are involved in the development
of functional chloroplast at post-flowering stage for drought tolerance of photosynthesis in barley under drought stress.
If validated in other populations, chlorophyll fluorescence parameters could be used as selection criteria for drought tolerance. 相似文献
36.
K. B. Saxena R. K. Saxena S. Sharma C. V. Sameer Kumar R. Sultana E. B. von Wettberg R. K. Varshney 《Euphytica》2018,214(12):222
With the exception of Cajanus cajan (L.) Millspaugh (pigeonpea), the remaining species of genus Cajanus have not been domesticated. For millennia these taxa have persisted in natural habitats through self-sown seeds. These wild species are an asset for sustaining future pigeonpea breeding programmes since they contain certain traits (genes) that are necessary for encountering various breeding challenges related to crop improvement and adaptation. In this review we identify the key traits from wild Cajanus species, and discuss various physical and genetic constraints encountered in their utilization in introgression breeding. Some noteworthy achievements recorded from inter-specific breeding programmes in pigeonpea are also discussed. These include the development of (1) high protein (>?28%) genotypes (2) cytoplasmic nuclear male sterility systems (3) highly (>?95%) self-pollinating genotypes, and (4) resistance sources to sterility mosaic disease, nematodes, salinity, photo-insensitivity, pod borers, podfly, bruchids, and Phytophthora blight. To help pigeonpea breeders engaged in inter-specific breeding programmes, we suggest the division of the secondary gene pool germplasm into two sub-group/tiers on the basis of ease in hybridization. 相似文献
37.
Mahendar Thudi Senapathi Senthilvel Andrew Bottley C. Tom Hash Arjula R. Reddy Alex F. Feltus Andrew H. Paterson David A. Hoisington Rajeev K. Varshney 《Euphytica》2010,174(2):253-260
A set of 22 pearl millet inbred lines including the parents of eleven mapping populations, was screened with 627 markers including
100 pearl millet genomic SSRs (gSSRs), 60 pearl millet EST-SSRs (eSSRs), 410 intron sequence haplotypes (ISHs), and 57 exon
sequence haplotypes (ESHs). In all, 267 (59%) of the markers were informative for at least one of the 11 mapping populations,
which segregate for traits like drought and salinity tolerance; host plant resistance to downy mildew, rust and blast; fertility
restoration and sterility and maintenance of cytoplasmic male sterility etc. An average of 116 polymorphic markers was identified
per mapping population. The average PIC values and number of profiles (P) per polymorphic marker were: gSSRs (PIC = 0.62, P = 6.1), ISHs (PIC = 0.39, P = 2.6), eSSRs (PIC = 0.36, P = 3.1) and ESHs (PIC = 0.35, P = 3.1). A high correlation (r > 0.97, P < 0.05) was observed between the patterns of diversity exposed by the different marker systems. The polymorphic markers identified
are suitable for the de novo construction, or the supplementation of pearl millet linkage maps. The genetic relationships identified among the panel of
inbred lines may be useful in designing strategies to improve the use of available genetic variation in the context of pearl
millet breeding. 相似文献
38.
39.
本研究旨在通过比较沙棘籽油(Hippophae rhamnoides)和防腐软膏(5%碘伏)、草本软膏(印度草药研究与供应有限公司)及一种刺激性温和的基础药膏(液体石蜡),来研究沙棘籽油对牛的皮肤伤口愈合效果。这个实验是将12头雄性牛犊分为4组,6头牛都有皮肤伤口,3头胸背部脊椎区的两边都用当地的镇痛药。伤口分别用液体石蜡、5%的碘伏软膏、沙棘籽油(沙棘油)及草本软膏处理28d,并分为Ⅰ、Ⅱ、Ⅲ、Ⅳ四组。不同处理的功效是建立在对经过0d、3d、7d、10d、14d和28d的不同临床血液参数的研究基础之上的。在研究中,所有组的心脏、呼吸率和血液学的各种参数及肛温都维持在正常的生理极限内。沙棘油和草本软膏对伤口处理的临床研究中发现,在伤口愈合的初期,伤口保持了一定的干燥度,并且抑制了炎症初期伤口的恶化。不同的组之间,在持续28d的实验中,用草本软膏和沙棘油做处理的组中伤口的愈合率最高。这些组的伤口试验同时还表现出早治疗,早治愈的特征。但是,在草本软膏和沙棘油处理组中,草本软膏组处理的伤口的整体愈合能力还是略优于沙棘油的疗效。 相似文献
40.
Use of immature seed germination and single seed descent for rapid genetic gains in pigeonpea
下载免费PDF全文
![点击此处可从《Plant Breeding》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Long duration required for generation advancement in pigeonpea [Cajanus cajan (L.) Millsp] is one of the major bottlenecks in realizing rapid genetic gains. Therefore, a technology for rapid generation turnover is warranted to facilitate the development of new cultivars and recombinant inbred lines. Breeding of early‐maturing cultivars has now opened up the possibility of rapid generation advance (RGA) in this crop. This paper reports the development of an RGA technology that integrates the germination of immature seeds with single seed descent method of breeding. The results showed that immature 35‐day‐old seeds can be used successfully to turn over a generation of pigeonpea with 100% seed germination. These way 3/4 successive generations can be grown within a year. The methodology presented in this study will accelerate the breeding process for breeding cultivars and develop rapidly the materials required for genomics research in pigeonpea. 相似文献