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Mónica Madrigal-Valverde Rodrigo F. Bittencourt Lindomar S. Brito Maicon P. Lents Elisiane S. Santos Anthony Valverde-Abarca 《Reproduction in domestic animals》2020,55(3):309-317
The present study aimed to evaluate differences in area, volume and testicular weight among groups related to breed and age of boar and establish associations between testicular parameters and seminal characteristics. Seminal quality has been studied using computer-assisted semen analysis (CASA) systems that reduce the subjectivity of kinematic parameters. Based on the data obtained through this system, sperm quality indexes and their derived parameters have been assessed to identify a better estimator for determining movement and velocity parameters. We also established indexes of velocity and sperm movement for boar semen. To this end, we evaluated 191 ejaculate samples from 63 boars. Differences related to the effects of season and age on quality boar semen were found (p ≤ .05) in the animal groups. Indexes were established for velocity and sperm movement based on CASA-Mot, and we proposed a sperm movement index (SMI) and sperm velocity index (SVI) with the CASA-Mot variables. Correlations were found (p < .05) among sperm indexes and CASA-Mot variables. Boar characteristics were found to be associated with some CASA-Mot variables, and the estimated SMI and SVI indexes predicted a greater variation in kinematic characteristics compared to the parameters evaluated separately using the CASA-Mot system. 相似文献
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Y. Chen Y. Inbar S. Zilkah A. Koren M. Dinar M. Gokkes M. Raviv R. Reuveni Shlomot Medina Y. Shamir Orna Etzion Orna Duvdevani Y. Shor R. Schayer Ester Hadar Ruhama Berliner A. Gamliel J. Katan G. Kritzman Leah Tsror A. Nachmias V. Weitsman D. Mor Y. Inbar M. J. Boehm H. A. J. Hoitink Y. Hadar Y. Elad H. Yunis H. Volpin E. Pressman A. Gamliel J. Katan M. Sachs 《Phytoparasitica》1991,19(2):161-170
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Survey of the Bru1 gene for brown rust resistance in Brazilian local and basic sugarcane germplasm 下载免费PDF全文
Ana Caroline Neuber Fernanda Raquel Camilo dos Santos Juliana Borges da Costa Maicon Volpin Mauro Alexandre Xavier Dilermando Perecin Roberto Carlos Villavicencio Burbano Marcos Guimarães de Andrade Landell Luciana Rossini Pinto 《Plant Breeding》2017,136(2):182-187
Bru1 is currently the major gene conferring brown rust resistance in sugarcane, and diagnostic markers are available. A survey for the presence of this gene was conducted on 391 genotypes including Brazilian cultivars, clones and basic germplasm. The efficiency of these markers for identifying resistant cultivars and artificially inoculated basic germplasm was also evaluated. The Bru1 frequency among cultivars (73.5%) suggests this gene is the prevalent source of brown rust resistance in Brazilian sugarcane breeding programmes. Most of the cultivars known to be resistant were positive for Bru1, although other genes for resistance could be present in lines not having Bru1. Only 17.8% of the basic germplasm accessions were positive for the Bru1 gene, and a low correlation between Bru1 diagnostic markers and brown rust severity was observed for basic germplasm accessions. Overall, Bru1 diagnostic markers proved to be efficient identifying resistant cultivars and clones and have potential to be in screening brown rust resistance in Brazilian breeding programmes. 相似文献
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Priscila de Andrade Rode Maicon Toldi Marliza Beatris Reichert Liana Johann Noeli Juarez Ferla 《Phytoparasitica》2018,46(1):137-141
The aim of this study was to assess the influence of transgenic soybean [Glycine max L. (Fabaceae)] cultivars on the biological cycle of Tetranychus ludeni Zacher (Acari: Tetranychidae) in laboratory conditions. We used three cultivars: a conventional soybean (CO), a glyphosate-resistant with insertion of genes of Agrobacterium sp., Roundup Ready (RR), and a glyphosate-resistant with insertion of genes of Bacillus thuringiensis var. israelensis (BT). Duration of developmental stage, mite viability, number of laid eggs, and female longevity of T. ludeni were evaluated. The duration of the deutonymph phase was shorter in RR (2.1?±?0.12 days) than in CO (2.6?±?0.12) and BT (2.5?±?0.08). The duration of egg, larval, and protonymph phases were similar for T. ludeni on the three cultivars. The mean duration of each generation (T), net reproduction rate (Ro), intrinsic rate of natural increase (rm), and doubling time (DT) were similar on the three cultivars. Results showed that population growth are not influenced by transgenesis at the laboratory level. Females died without a post-oviposition period on all soybean cultivars. The intrinsic rate of natural increase of T. ludeni on soybean cultivars was low (between 0.15 and 0.17). 相似文献
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Leaves ofPelargonium domesticum andRuscus hypoglossum infected byBotrytis cinerea Pers., produced 12 and 1.5 nl ethylene/h/g, respectively, 34 days after inoculation; wounded or healthy leaves and phyloclades
of them produced much lower amounts. When the fungus was grown on dead leaves it produced negligible amounts of the gas even
when supplemented with methionine. Exogenous ethylene enhanced gray mold development in both hosts. Silver thiosulfate, aminooxyacetic
acid (AOA) and aminoethoxyvinylglycine significantly inhibited disease development in pelargonium, and the latter two compounds
inhibited ethylene production. AOA inhibited disease development and ethylene production in cut rose flowers; calcium ions
inhibited disease development whereas the chelator EGTA [ethylene glycol bis-(β-aminoethyl ether)N,N,N′,N′-tetraacetic acid]
enhanced it. Disease suppression by an excess of Ca2+ was correlated with repression of ethylene production by the flowers, whereas deficiency in Ca2+ increased disease severity.
Publication of the Agricultural Research Organization. No. 2413-E, 1988 series. 相似文献
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Mezzomo Henrique Caletti Casagrande Cleiton Renato e Silva Caique Machado Borém Aluízio Nardino Maicon 《Journal of Crop Science and Biotechnology》2021,24(2):167-177
Journal of Crop Science and Biotechnology - The aims of this study are to verify the existence of canonical correlations between physiological and agronomic traits of 40 lines of tropical wheat... 相似文献
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Agricultural Genomics: An Approach to Plant Protection 总被引:6,自引:0,他引:6
Hinanit Koltai Hanne Volpin 《European journal of plant pathology / European Foundation for Plant Pathology》2003,109(2):101-108
Genomics studies, focused on whole-genome analysis, have opened up a new era for biology in general, and for agriculture in particular. Along with the use of genetic plant models and the progress in sequencing agriculturally important organisms, the combination of bioinformatics and functional genomics globally enhances agricultural genomics. These studies are likely to pave the way towards better understanding of plant–pathogen biological networks, and eventually to lead to breakthroughs in the promotion of plant resistance to agricultural pests. 相似文献
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