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https://www.readbyqxmd.com/read/28936114/practical-application-of-genomic-selection-in-a-doubled-haploid-winter-wheat-breeding-program
#1
Jiayin Song, Brett F Carver, Carol Powers, Liuling Yan, Jaroslav Klápště, Yousry A El-Kassaby, Charles Chen
Crop improvement is a long-term, expensive institutional endeavor. Genomic selection (GS), which uses single nucleotide polymorphism (SNP) information to estimate genomic breeding values, has proven efficient to increasing genetic gain by accelerating the breeding process in animal breeding programs. As for crop improvement, with few exceptions, GS applicability remains in the evaluation of algorithm performance. In this study, we examined factors related to GS applicability in line development stage for grain yield using a hard red winter wheat (Triticum aestivum L...
2017: Molecular Breeding: New Strategies in Plant Improvement
https://www.readbyqxmd.com/read/28934242/twelve-years-of-chiari-like-malformation-and-syringomyelia-scanning-in-cavalier-king-charles-spaniels-in-the-netherlands-towards-a-more-precise-phenotype
#2
Katrien Wijnrocx, Leonie W L Van Bruggen, Wieteke Eggelmeijer, Erik Noorman, Arnold Jacques, Nadine Buys, Steven Janssens, Paul J J Mandigers
Chiari-like malformation (CM), syringomyelia (SM) and middle ear effusion (also called PSOM) are three conditions that frequently occur in Cavalier King Charles Spaniels (CKCS). Both CM and SM are currently screened in the Netherlands prior to breeding and are graded according to the British Veterinary Association's Kennel Club (BVA/KC) scheme. This study evaluated the prevalence and estimated genetic parameter of CM, SM and middle ear effusion from 12 years of screening results. For SM, the classical method using the BVA/KC scheme, was compared with exact measuring of the central canal dilation...
2017: PloS One
https://www.readbyqxmd.com/read/28934115/development-of-genome-wide-ssr-markers-from-angelica-gigas-nakai-using-next-generation-sequencing
#3
Jinsu Gil, Yurry Um, Serim Kim, Ok Tae Kim, Sung Cheol Koo, Chinreddy Subramanyam Reddy, Seong-Cheol Kim, Chang Pyo Hong, Sin-Gi Park, Ho Bang Kim, Dong Hoon Lee, Byung-Hoon Jeong, Jong-Wook Chung, Yi Lee
Angelica gigas Nakai is an important medicinal herb, widely utilized in Asian countries especially in Korea, Japan, and China. Although it is a vital medicinal herb, the lack of sequencing data and efficient molecular markers has limited the application of a genetic approach for horticultural improvements. Simple sequence repeats (SSRs) are universally accepted molecular markers for population structure study. In this study, we found over 130,000 SSRs, ranging from di- to deca-nucleotide motifs, using the genome sequence of Manchu variety (MV) of A...
September 21, 2017: Genes
https://www.readbyqxmd.com/read/28933130/-research-progress-on-breeding-standard-of-medicinal-animals-and-discussion-on-several-key-problems
#4
Yi-Quan Zhou, Xian-You Qu, Guang Yang, Jun-de Li, Yan Su, Ying Li
Medicinal animal breeding standards is regarded as the law to normalize relevant production that can guarantee the quality of traditional Chinese medicine of animal category. The article summarized the medicinal animal resources in our country and the present condition of medicinal animal breeding standards. It considered the current animal breeding standards system was in adequate, not only the quantity of breeding standards, the standard content and index were also uncomprehensive, which is not conducive to the scientific and orderly development and utilization of medicinal animal resources...
December 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28929983/genetic-perspective-of-milk-yield-persistency-in-the-first-three-lactations-of-iranian-buffaloes-bubalus-bubalis
#5
Navid Ghavi Hossein-Zadeh, Mohammad Ali Nazari, Abdol Ahad Shadparvar
The objectives of this study were to estimate the genetic parameters and genetic trends for different measures of persistency (PM) for milk yield in Iranian buffaloes using a random regression test day model. Test day records of the first three lactations of buffaloes within 715 herds comprising 43 014, 38 941 and 33 937 records, respectively, were obtained from the Animal Breeding Center of Iran during 1992 to 2012. Legendre polynomial functions were chosen to fit the lactation curves in the framework of a random regression test day model for estimating (co)variance components...
September 20, 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/28928381/crispr-cas9-induced-targeted-mutagenesis-and-gene-replacement-to-generate-long-shelf-life-tomato-lines
#6
Qing-Hui Yu, Baike Wang, Ning Li, Yaping Tang, Shengbao Yang, Tao Yang, Juan Xu, Chunmiao Guo, Peng Yan, Qiang Wang, Patiguli Asmutola
Quickly and precisely gain genetically enhanced breeding elites with value-adding performance traits is desired by the crop breeders all the time. The present of gene editing technologies, especially the CRISPR/Cas9 system with the capacities of efficiency, versatility and multiplexing provides a reasonable expectation towards breeding goals. For exploiting possible application to accelerate the speed of process at breeding by CRISPR/Cas9 technology, in this study, the Agrobacterium tumefaciens-mediated CRISPR/Cas9 system transformation method was used for obtaining tomato ALC gene mutagenesis and replacement, in absence and presence of the homologous repair template...
September 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28922405/assessment-on-induced-genetic-variability-and-divergence-in-the-mutagenized-lentil-populations-of-microsperma-and-macrosperma-cultivars-developed-using-physical-and-chemical-mutagenesis
#7
Rafiul Amin Laskar, Samiullah Khan
Induced mutagenesis was employed to create genetic variation in the lentil cultivars for yield improvement. The assessments were made on genetic variability, character association, and genetic divergence among the twelve mutagenized populations and one parent population of each of the two lentil cultivars, developed by single and combination treatments with gamma rays and hydrazine hydrates. Analysis of variance revealed significant inter-population differences for the observed quantitative phenotypic traits...
2017: PloS One
https://www.readbyqxmd.com/read/28921508/selection-on-skewed-characters-and-the-paradox-of-stasis
#8
Suzanne Bonamour, Céline Teplitsky, Anne Charmantier, Pierre-André Crochet, Luis-Miguel Chevin
Observed phenotypic responses to selection in the wild often differ from predictions based on measurements of selection and genetic variance. An overlooked hypothesis to explain this paradox of stasis is that a skewed phenotypic distribution affects natural selection and evolution. We show through mathematical modelling that, when a trait selected for an optimum phenotype has a skewed distribution, directional selection is detected even at evolutionary equilibrium, where it causes no change in the mean phenotype...
September 18, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28919680/effects-of-body-conformation-and-udder-morphology-on-milk-yield-of-zebu-cows-in-north-region-of-cameroon
#9
Kilekoung Jean-Pierre Mingoas, Julius Awah-Ndukum, Houinga Dakyang, Pagnah André Zoli
AIM: The aim of the study was to assess the effect of udder morphological characteristics on milk yield in zebu cows of Cameroon. MATERIALS AND METHODS: The diameter and height of the udder, length and diameter of the teat, and the milk yield were measured in 29 Djafun (Red Mbororo) and 19 Aku (White Fulani) cows in Louggueré zootechnical station in the North region of Cameroon. RESULTS: Overall, strong positive correlation (rp=0.60) between the diameter (240...
August 2017: Veterinary World
https://www.readbyqxmd.com/read/28919677/influence-of-microclimatic-ammonia-levels-on-productive-performance-of-different-broilers-breeds-estimated-with-univariate-and-multivariate-approaches
#10
Essam S Soliman, Sherif A Moawed, Rania A Hassan
BACKGROUND AND AIM: Birds litter contains unutilized nitrogen in the form of uric acid that is converted into ammonia; a fact that does not only affect poultry performance but also has a negative effect on people's health around the farm and contributes in the environmental degradation. The influence of microclimatic ammonia emissions on Ross and Hubbard broilers reared in different housing systems at two consecutive seasons (fall and winter) was evaluated using a discriminant function analysis to differentiate between Ross and Hubbard breeds...
August 2017: Veterinary World
https://www.readbyqxmd.com/read/28919010/germ-cell-proliferation-and-apoptosis-during-testicular-regression-in-a-seasonal-breeding-fish-kept-in-captivity
#11
Yves Moreira Ribeiro, Santer Alvares de Matos, Fabricio Flavio Theophilo Domingos, Helio Batista Dos Santos, Augusto Bicalho Cruz Vieira, Nilo Bazzoli, Elizete Rizzo
Cell proliferation and apoptosis regulate germ cells stock and sperm production, eliminate anomalous gametes, and are essential parameters to consider in fish farming. Herein, spermatogenic activity as well as germ cell proliferation and apoptosis were assessed in Leporinus taeniatus, a seasonal breeding species from the São Francisco River basin, Brazil. Testes of 24 adult fishes from a farming station were sampled between December and July and processed for light and transmission electron microscopy and immunohistochemistry for PCNA and TUNEL assay...
September 12, 2017: Tissue & Cell
https://www.readbyqxmd.com/read/28916922/evaluation-of-zmcct-haplotypes-for-genetic-improvement-of-maize-hybrids
#12
Yipu Li, Lixiu Tong, Lele Deng, Qiyu Liu, Yuexian Xing, Chao Wang, Baoshen Liu, Xiaohong Yang, Mingliang Xu
The elite ZmCCT haplotypes which have no transposable element in the promoter could enhance maize resistance to Gibberella stalk rot and improve yield-related traits, while having no or mild impact on flowering time. Therefore, they are expected to have great value in future maize breeding programs. A CCT domain-containing gene, ZmCCT, is involved in both photoperiod response and stalk rot resistance in maize. At least 15 haplotypes are present at the ZmCCT locus in maize germplasm, whereas only three of them are found in Chinese commercial maize hybrids...
September 15, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28912788/development-and-genetic-characterization-of-advanced-backcross-materials-and-an-introgression-line-population-of-solanum-incanum-in-a-s-melongena-background
#13
Pietro Gramazio, Jaime Prohens, Mariola Plazas, Giulio Mangino, Francisco J Herraiz, Santiago Vilanova
Advanced backcrosses (ABs) and introgression lines (ILs) of eggplant (Solanum melongena) can speed up genetics and genomics studies and breeding in this crop. We have developed the first full set of ABs and ILs in eggplant using Solanum incanum, a wild eggplant that has a relatively high tolerance to drought, as a donor parent. The development of these ABs and IL eggplant populations had a low efficiency in the early stages, because of the lack of molecular markers and genomic tools. However, this dramatically improved after performing genotyping-by-sequencing in the first round of selfing, followed by high-resolution-melting single nucleotide polymorphism genotyping in subsequent selection steps...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28910329/classification-and-conservation-priority-of-five-deccani-sheep-ecotypes-of-maharashtra-india
#14
Dinesh Kumar Yadav, Reena Arora, Anand Jain
Characterization of Indian livestock breeds has mostly been limited to single breed/population focused on either physical description of traditionally recognized breeds/populations or to their genetic description. Usually, morphological and genetic characterization has taken place in isolation. A parallel morphological characterization of genetically identified breeds or genetic characterization of morphologically described breeds is mostly missing, and their conservation priorities have largely been based on solely considering degree of endangerment...
2017: PloS One
https://www.readbyqxmd.com/read/28903904/insights-of-sex-determination-and-differentiation-from-medaka-as-a-teleost-model
#15
Yi Kang, Gui-Jun Guan, Yun-Han Hong
The mechanisms of sex determination and differentiation in fish are highly divergent with a broad range of gonadal differentiation types from hermaphroditism to gonochorism. Multiple triggers regulate the process of sexual differentiation including genetic or environmental factors (temperature, light, hormones and/or pH value, etc.). In recent years, with the advances of molecular technologies and genetic engineering approaches, there are significant breakthroughs in identifying the master genes of vertebrate sex determination and differentiation...
June 20, 2017: Yi Chuan, Hereditas
https://www.readbyqxmd.com/read/28901587/serum-estradiol-and-progesterone-profiles-during-estrus-pseudopregnancy-and-active-gestation-in-steller-sea-lions
#16
Renae Sattler, Lori Polasek
While the proximate driver behind the decline of the Western stock of Steller sea lions (Eumetopias jubatus, >80% since 1970s) is likely multifactorial, the population reduction may have been powered by a decrease in fecundity. A harvest of Steller sea lions in the 1970s and 80s revealed a 30% reduction in the proportion of pregnant females from early (October-November) to late gestation (April-May). Identification and quantification of these reproductive failures are difficult when we lack species-specific data on endocrinology associated with discrete stages of the reproductive cycle (i...
September 13, 2017: Zoo Biology
https://www.readbyqxmd.com/read/28900747/transcriptome-analysis-and-identification-of-significantly-differentially-expressed-genes-in-holstein-calves-subjected-to-severe-thermal-stress
#17
Krishnamoorthy Srikanth, Eunjin Lee, Anam Kwan, Youngjo Lim, Junyep Lee, Gulwon Jang, Hoyoung Chung
RNA-Seq analysis was used to characterize transcriptome response of Holstein calves to thermal stress. A total of eight animals aged between 2 and 3 months were randomly selected and subjected to thermal stress corresponding to a temperature humidity index of 95 in an environmentally controlled house for 12 h consecutively for 3 days. A set of 15,787 unigenes were found to be expressed and after a threshold of threefold change, and a Q value <0.05; 502, 394, and 376 genes were found to be differentially expressed on days 1, 2, and 3 out of which 343, 261 and 256 genes were upregulated and 159, 133, and 120 genes were downregulated...
September 12, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28900616/implementing-precision-antimicrobial-therapy-for-the-treatment-of-bovine-respiratory-disease-current-limitations-and-perspectives
#18
Guillaume Lhermie, Pierre-Louis Toutain, Farid El Garch, Alain Bousquet-Mélou, Sébastien Assié
The therapeutic efficacy of an early treatment protocol with an infection-stage adjusted fluoroquinolone regimen was evaluated in a field study on young bulls (YBs) presenting signs of bovine respiratory disease (BRD). A total of 195 YB (Charolais, Limousin, and Rouge-des-Prés breeds) from 6 farms implementing or not prophylactic antimicrobial treatments (PROPHY or absence) were randomly assigned to 1 of 2 experiment groups based on time of detection of BRD and first-line marbofloxacin regimen, early adjusted dose [Early 2 (E2)] or late standard dose [Late 10 (L10)]...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28900291/assessing-the-expected-response-to-genomic-selection-of-individuals-and-families-in-eucalyptus-breeding-with-an-additive-dominant-model
#19
R T Resende, M D V Resende, F F Silva, C F Azevedo, E K Takahashi, O B Silva-Junior, D Grattapaglia
We report a genomic selection (GS) study of growth and wood quality traits in an outbred F2 hybrid Eucalyptus population (n=768) using high-density single-nucleotide polymorphism (SNP) genotyping. Going beyond previous reports in forest trees, models were developed for different selection targets, namely, families, individuals within families and individuals across the entire population using a genomic model including dominance. To provide a more breeder-intelligible assessment of the performance of GS we calculated the expected response as the percentage gain over the population average expected genetic value (EGV) for different proportions of genomically selected individuals, using a rigorous cross-validation (CV) scheme that removed relatedness between training and validation sets...
October 2017: Heredity
https://www.readbyqxmd.com/read/28899355/genetic-tests-for-estimating-dairy-breed-proportion-and-parentage-assignment-in-east-african-crossbred-cattle
#20
Eva M Strucken, Hawlader A Al-Mamun, Cecilia Esquivelzeta-Rabell, Cedric Gondro, Okeyo A Mwai, John P Gibson
BACKGROUND: Smallholder dairy farming in much of the developing world is based on the use of crossbred cows that combine local adaptation traits of indigenous breeds with high milk yield potential of exotic dairy breeds. Pedigree recording is rare in such systems which means that it is impossible to make informed breeding decisions. High-density single nucleotide polymorphism (SNP) assays allow accurate estimation of breed composition and parentage assignment but are too expensive for routine application...
September 12, 2017: Genetics, Selection, Evolution: GSE
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