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https://www.readbyqxmd.com/read/28110460/ability-of-rf5-and-rf6-to-restore-fertility-of-chinsurah-boro-ii-type-cytoplasmic-male-sterile-oryza-sativa-ssp-japonica-lines
#1
Honggen Zhang, Jianlan Che, Yongshen Ge, Yan Pei, Lijia Zhang, Qiaoquan Liu, Minghong Gu, Shuzhu Tang
BACKGROUND: Three-line Oryza sativa (ssp. japonica) hybrids have been developed mainly using Chinsurah Boro II (BT)-type cytoplasmic male sterility (CMS). The Rf1 gene restores the fertility of BT-type CMS lines, and is the only fertility restorer gene (Rf) that has been used to produce three-line japonica hybrids. Using more Rf genes to breed BT-type restorer lines may broaden the genetic diversity of the restorer lines, and represents a viable approach to improve the heterosis level of BT-type japonica hybrids...
December 2017: Rice
https://www.readbyqxmd.com/read/28110365/vigour-in-west-african-dwarf-kids-within-the-first-24%C3%A2-h-post-partum
#2
I I Abdul-Rahman, A Bernard
One hundred and fifty West African Dwarf (WAD) kids were tested at the National Goats Breeding Station to determine the effects of some neonatal factors on their vigour levels within the first 24 h post-partum. The kids were also tested to establish the relationship between maternal weight, rectal temperature, times of first standing and sucking, sucking period and vigour. The distance covered (in meters) by a kid towards its mother during a 5-min test period was considered as vigour trait. Vigour levels increased significantly (p < 0...
January 21, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28110339/the-effect-of-homoeologous-meiotic-pairing-in-tetraploid-hordeum-bulbosum-l-%C3%A3-h-vulgare-l-hybrids-on-alien-introgressions-in-offspring
#3
Margret Scholz, Galina Pendinen
The pairing behaviour of the individual chromosome arms of Hordeum vulgare (Hv) with their homoeologous arms of H. bulbosum (Hb) at metaphase I of meiosis in tetraploid Hb × Hv hybrids and the frequencies of recombined Hv chromosome arms in selfed offspring were studied on differentially visualized chromosomes after fluorescent in situ hybridisation. The frequencies of paired Hv-Hb arms in the F2 and F3 hybrids were correlated with the frequencies of recombined Hv chromosomes in progenies. Self-generation of hybrids, the number of Hv and Hb chromosomes, and the number of recombined Hv chromosomes of the hybrids strongly influenced the Hv-Hb pairing frequency in meiosis...
January 21, 2017: Cytogenetic and Genome Research
https://www.readbyqxmd.com/read/28110266/dioecy-in-amborella-trichopoda-evidence-for-genetically-based-sex-determination-and-its-consequences-for-inferences-of-the-breeding-system-in-early-angiosperms
#4
Nicolas Anger, Bruno Fogliani, Charles P Scutt, Gildas Gâteblé
BACKGROUND AND AIMS: This work aimed to gain insight into the breeding system at the base of living angiosperms through both character state reconstructions and the study of sex ratios and phenotypes in the likely sister to all other living angiosperms, Amborella trichopoda METHODS: Sex phenotypes were mapped onto a phylogeny of basally diverging angiosperms using maximum parsimony. In parallel, sex ratios and phenotypes were studied over two consecutive flowering seasons in an ex situ population of A...
January 20, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28109801/solid-phase-microextraction-sand-flies-oviposition-pheromones-plaster-of-paris-and-siloxanes-what-is-in-common
#5
Thais Marchi Goulart, Christiann Davis Tosta, Vicente Estevam Machado, Flávia Benini da Rocha Silva, Camila Feitosa de Castro, Dennys Ghenry Samillan Ortiz, Wanderson Henrique Cruz Oliveira, Mara Cristina Pinto
Sand flies are natural hosts of various microorganisms. Due to their epidemiological importance, sand fly colonies are kept in laboratories to be studied in terms of their biology and vector/host/parasite interactions. In order to investigate the presence of oviposition pheromones in Nyssomyia neivai, experiments using Solid Phase Microextraction (SPME) were performed. However, siloxanes which is an external class of contamination, present in breeding containers made by plaster used to maintain sand flies in colonies, may be hindered the experiments...
January 18, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28109609/economic-evaluation-of-progeny-testing-and-genomic-selection-schemes-for-small-sized-nucleus-dairy-cattle-breeding-programs-in-developing-countries
#6
C M Kariuki, E W Brascamp, H Komen, A K Kahi, J A M van Arendonk
In developing countries minimal and erratic performance and pedigree recording impede implementation of large-sized breeding programs. Small-sized nucleus programs offer an alternative but rely on their economic performance for their viability. We investigated the economic performance of 2 alternative small-sized dairy nucleus programs [i.e., progeny testing (PT) and genomic selection (GS)] over a 20-yr investment period. The nucleus was made up of 453 male and 360 female animals distributed in 8 non-overlapping age classes...
January 18, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28109604/genome-wide-mapping-of-10-calving-and-fertility-traits-in-holstein-dairy-cattle-with-special-regard-to-chromosome-18
#7
M-P Müller, S Rothammer, D Seichter, I Russ, D Hinrichs, J Tetens, G Thaller, I Medugorac
Over the last decades, a dramatic decrease in reproductive performance has been observed in Holstein cattle and fertility problems have become the most common reason for a cow to leave the herd. The premature removal of animals with high breeding values results in both economic and breeding losses. For efficient future Holstein breeding, the identification of loci associated with low fertility is of major interest and thus constitutes the aim of this study. To reach this aim, a genome-wide combined linkage disequilibrium and linkage analysis (cLDLA) was conducted using data on the following 10 calving and fertility traits in the form of estimated breeding values: days from first service to conception of heifers and cows, nonreturn rate on d 56 of heifers and cows, days from calving to first insemination, days open, paternal and maternal calving ease, paternal and maternal stillbirth...
January 18, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28109603/comparison-between-direct-and-indirect-methods-for-exploiting-fourier-transform-spectral-information-in-estimation-of-breeding-values-for-fine-composition-and-technological-properties-of-milk
#8
V Bonfatti, D Vicario, L Degano, A Lugo, P Carnier
The aim of this study was to compare the common method of exploiting infrared spectral data in animal breeding; that is, estimating the breeding values for the traits predicted by infrared spectroscopy, and an alternative approach based on the direct use of spectral information (direct prediction, DP) to predict the estimated breeding values (EBV). Traits were pH, milk coagulation properties, contents of the main casein and whey protein fractions, cheese yield measured by micro-cheese making, lactoferrin, Ca, and fat composition...
January 18, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28109590/phenotypic-genetic-and-single-nucleotide-polymorphism-marker-associations-between-calf-diseases-and-subsequent-performance-and-disease-occurrences-of-first-lactation-german-holstein-cows
#9
M Mahmoud, T Yin, K Brügemann, S König
A total of 31,396 females born from 2010 to 2013 in 43 large-scale Holstein-Friesian herds were phenotyped for calf and cow disease traits using a veterinarian diagnosis key. Calf diseases were general disease status (cGDS), calf diarrhea (cDIA), and calf respiratory disease (cRD) recorded from birth to 2 mo of age. Incidences were 0.48 for cGDS, 0.28 for cRD, and 0.21 for cDIA. Cow disease trait recording focused on the early period directly after calving in first parity, including the interval from 10 d before calving to 200 d in lactation...
January 18, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28109585/influence-of-breed-milk-yield-and-temperature-humidity-index-on-dairy-cow-lying-time-neck-activity-reticulorumen-temperature-and-rumination-behavior
#10
A E Stone, B W Jones, C A Becker, J M Bewley
The objective of this study was to compare weekly mean lying time (LT), neck activity (NA), reticulorumen temperature (RT), and rumination time (RU) among 3 breed groups, milk yield (MY), and temperature-humidity index (THI). Cows (n = 36; 12 Holstein, 12 crossbred, and 12 Jersey) were blocked by parity group (primiparous or multiparous), days in milk, and MY. Lying time, NA, RT, RU, and MY were recorded and averaged by day and then by week for each cow. For study inclusion, each cow was required to have 10 wk of LT, NA, RT, and RU data...
January 18, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28109261/genetic-diversity-extent-of-linkage-disequilibrium-and-persistence-of-gametic-phase-in-canadian-pigs
#11
Daniela A Grossi, Mohsen Jafarikia, Luiz F Brito, Marcos E Buzanskas, Mehdi Sargolzaei, Flávio S Schenkel
BACKGROUND: Knowledge on the levels of linkage disequilibrium (LD) across the genome, persistence of gametic phase between breed pairs, genetic diversity and population structure are important parameters for the successful implementation of genomic selection. Therefore, the objectives of this study were to investigate these parameters in order to assess the feasibility of a multi-herd and multi-breed training population for genomic selection in important purebred and crossbred pig populations in Canada...
January 21, 2017: BMC Genetics
https://www.readbyqxmd.com/read/28109190/qtl-mapping-and-candidate-genes-for-resistance-to-fusarium-ear-rot-and-fumonisin-contamination-in-maize
#12
Valentina Maschietto, Cinzia Colombi, Raul Pirona, Giorgio Pea, Francesco Strozzi, Adriano Marocco, Laura Rossini, Alessandra Lanubile
BACKGROUND: Fusarium verticillioides is a common maize pathogen causing ear rot (FER) and contamination of the grains with the fumonisin B1 (FB1) mycotoxin. Resistance to FER and FB1 contamination are quantitative traits, affected by environmental conditions, and completely resistant maize genotypes to the pathogen are so far unknown. In order to uncover genomic regions associated to reduced FER and FB1 contamination and identify molecular markers for assisted selection, an F2:3 population of 188 progenies was developed crossing CO441 (resistant) and CO354 (susceptible) genotypes...
January 21, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28109070/peste-des-petits-ruminants-risk-factors-and-space-time-clusters-in-mymensingh-bangladesh
#13
M S Rony, A K M A Rahman, M M Alam, N Dhand, M P Ward
Using a hospital-based case-control study design, our aim was to identify risk factors for-and space-time clusters of-Peste des Petits Ruminants (PPR) in Mymensingh, Bangladesh. Three hundred and eighty PPR cases diagnosed between January 2005 and December 2014 at the Bangladesh Agricultural University Veterinary Teaching Hospital (BAUVTH) were selected; three controls per case from BAUVTH were then selected (n = 1,048). From records, data extracted included information on date of report, location, age, breed, sex and body weight of goats...
January 21, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28109018/gonad-histology-and-serum-11-kt-profile-during-the-annual-reproductive-cycle-in-sterlet-sturgeon-adult-males-acipenser-ruthenus
#14
A Golpour, C Broquard, S Milla, H Dadras, A R Baloch, T Saito, M Pšenička
The aim of this study was to assess monthly testicular development in the cultured breeding stock of sterlet, Acipenser ruthenus, using histological and serum sex steroid changes. Testicular development in the adult male was examined monthly and showed four distinct phases including resting, pre-spawning, spawning and post-spawning. Also, seasonal changes of the testes were described according to its variations in gonadosomatic index (GSI) during different phases of testicular development. Using histology, we identified continuous spermatogenesis and asynchronous gonad development pattern in the testes of male sterlet, which shows that regulation of annual gonadal cycle is influenced by season...
January 21, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28108965/transcriptomic-and-hormone-analyses-reveal-mechanisms-underlying-petal-elongation-in-chrysanthemum-morifolium-jinba
#15
Jingjing Wang, Haibin Wang, Lian Ding, Aiping Song, Feng Shen, Jiafu Jiang, Sumei Chen, Fadi Chen
Auxin regulates chrysanthemum petal elongation by promoting cell elongation. Transcriptomic analysis shows that auxin signal transduction may connect with other transcription factors by TCPs to regulate chrysanthemum petal elongation. As an ornamental species, Chrysanthemum morifolium has high ornamental and economic value. Petal size is the primary factor that influences the ornamental value of chrysanthemum, but the mechanism underlying the development of C. morifolium petals remains unclear. In our study, we tracked the growth of petals and found that the basal region of 'Jinba' petals showed a higher elongation rate, exhibiting rapid cell elongation during petal growth...
January 20, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28108074/photo-fermentative-hydrogen-production-from-crop-residue-a-mini-review
#16
REVIEW
Quanguo Zhang, Yi Wang, Zhiping Zhang, Duu-Jong Lee, Xuehua Zhou, Yanyan Jing, Xumeng Ge, Danping Jiang, Jianjun Hu, Chao He
Photofermentative hydrogen production from crop residues, if feasible, can lead to complete conversion of organic substances to hydrogen (and carbon dioxide). This mini review lists the studies on photofermentative hydrogen production using crop residues as feedstock. Pretreatment methods, substrate structure, mechanism of photosynthetic bacteria growth and metabolism were discussed. Photofermentative hydrogen production from pure culture, consortia and mutants, and the geometry, light sources, mass transfer resistances and the operational strategies of the photo-bioreactor were herein reviewed...
January 10, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28108032/disruption-of-the-sheep-bmpr-ib-gene-by-crispr-cas9-in-in%C3%A2-vitro-produced-embryos
#17
Xuemei Zhang, Wenrong Li, Yangsheng Wu, Xinrong Peng, Bian Lou, Liqin Wang, Mingjun Liu
BMPR-IB (also known as FecB) is a key candidate gene for the genetic control of sheep reproductive performance. Loss-of-function mutations in the sheep BMPR-IB gene lead to an increase in ovulation rate and consequently larger litter size. However, the BMPR-IB gene has been identified in only a few sheep breeds. To improve sheep reproduction through modification of the BMPR-IB gene, we designed an sgRNA to target the sheep BMPR-IB gene by using the CRISPR/Cas9 system. First, we performed gene editing by injecting Cas9/sgRNA into the cytoplasm of one-cell fertilized eggs...
November 9, 2016: Theriogenology
https://www.readbyqxmd.com/read/28107881/a-census-to-determine-the-prevalence-and-risk-factors-for-caprine-arthritis-encephalitis-virus-and-visna-maedi-virus-in-the-swiss-goat-population
#18
B Thomann, L C Falzon, G Bertoni, H R Vogt, G Schüpbach-Regula, I Magouras
In Switzerland, viruses belonging to two different phylogenetic groups of small ruminant lentiviruses (SRLV) are currently circulating: the caprine arthritis-encephalitis virus (CAEV) and visna/maedi virus (VMV). In the past two decades, a mandatory national control program has led to a very low prevalence of seropositivity, while completely eliminating CAE as a clinical manifestation. However, in order to reduce the high costs and effort associated with this program, adjustments based on the most recent epidemiological knowledge are needed...
February 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28107780/myb12-and-myb22-play-essential-roles-in-proanthocyanidin-and-flavonol-synthesis-in-red-fleshed-apple-malus-sieversii-f-niedzwetzkyana
#19
Nan Wang, Haifeng Xu, Shenghui Jiang, Zongying Zhang, Ninglin Lu, Huarong Qiu, Changzhi Qu, Yicheng Wang, Shujing Wu, Xuesen Chen
Flavonoids are major polyphenol compounds in plant secondary metabolism. Compared with cultivated apples, wild red-fleshed apples (Malus sieversii f. niedzwetzkyana) are excellent resources because of their high flavonoid content. In this work, R6R6, R6R1 and R1R1 genotypes were identified in an F1 segregating population of M. sieversii f. niedzwetzkyana. Significant differences in flavonoid compositions and contents were detected among the three genotypes by UPLC-ESI-TOF/MS analysis. Furthermore, two putative flavonoid-related genes encoding R2R3-MYB transcription factors, designated MYB12 and MYB22, were cloned and characterized...
January 20, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28107778/parabolic-variation-in-sexual-selection-intensity-across-the-range-of-a%C3%A2-cold-water-pipefish-implications-for-susceptibility-to-climate-change
#20
Nuno Monteiro, Mário Cunha, Lídia Ferreira, Natividade Vieira, Agostinho Antunes, David Lyons, Adam G Jones
While an understanding of evolutionary processes in shifting environments is vital in the context of rapid ecological change, one of the most potent selective forces, sexual selection, remains curiously unexplored. Variation in sexual selection across a species range, especially across a gradient of temperature regimes, has the potential to provide a window into the possible impacts of climate change on the evolution of mating patterns. Here, we investigated some of the links between temperature and indicators of sexual selection, using a cold-water pipefish as model...
January 20, 2017: Global Change Biology
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