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https://www.readbyqxmd.com/read/28938768/dual-functioning-ovaries-and-atresia-in-chickens-is-it-a-coincidence
#1
D A T Sutherland, C F Honaker, P B Siegel
During the course of a QTL study involving an intercross between White Plymouth Rock chickens and Red Jungle Fowl, certain reproductive anomalies such as atresia and double ovary-oviduct became evident. Observed in reciprocal pedigreed F1 crosses were 2 full-sib pullets with dual functioning ovaries. One also had complete functioning left and right oviducts. The other had asymmetrical reproductive tracts with a typical left oviduct and a rudimentary right oviduct. In addition, there were 3 females with atresia...
October 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/28936219/a-high-density-genetic-map-derived-from-rad-sequencing-and-its-application-in-qtl-analysis-of-yield-related-traits-in-vigna-unguiculata
#2
Lei Pan, Nian Wang, Zhihua Wu, Rui Guo, Xiaolu Yu, Yu Zheng, Qiuju Xia, Songtao Gui, Chanyou Chen
Cowpea [Vigna unguiculata (L.) Walp.] is an annual legume of economic importance and widely grown in the semi-arid tropics. However, high-density genetic maps of cowpea are still lacking. Here, we identified 34,868 SNPs (single nucleotide polymorphisms) that were distributed in the cowpea genome based on the RAD sequencing (restriction-site associated DNA sequencing) technique using a population of 170 individuals (two cowpea parents and 168 F2:3 progenies). Of these, 17,996 reliable SNPs were allotted to 11 consensus linkage groups (LGs)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28934121/current-status-of-early-blight-resistance-in-tomato-an-update
#3
REVIEW
Pragya Adhikari, Yeonyee Oh, Dilip R Panthee
Early blight (EB) is one of the dreadful diseases of tomato caused by several species of Alternaria including Alternaria linariae (which includes A. solani and A. tomatophila), as well as A. alternata. In some instances, annual economic yield losses due to EB have been estimated at 79%. Alternaria are known only to reproduce asexually, but a highly-virulent isolate has the potential to overcome existing resistance genes. Currently, cultural practices and fungicide applications are employed for the management of EB due to the lack of strong resistant cultivars...
September 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28932230/high-density-linkage-map-construction-and-qtl-detection-for-three-silique-related-traits-in-orychophragmus-violaceus-derived-brassica-napus-population
#4
Yi Yang, Yusen Shen, Shunda Li, Xianhong Ge, Zaiyun Li
Seeds per silique (SS), seed weight (SW), and silique length (SL) are important determinant traits of seed yield potential in rapeseed (Brassica napus L.), and are controlled by naturally occurring quantitative trait loci (QTLs). Mapping QTLs to narrow chromosomal regions provides an effective means of characterizing the genetic basis of these complex traits. Orychophragmus violaceus is a crucifer with long siliques, many SS, and heavy seeds. A novel B. napus introgression line with many SS was previously selected from multiple crosses (B...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28931074/genetic-and-phenotypic-effects-of-chromosome-segments-introgressed-from-gossypium-barbadense-into-gossypium-hirsutum
#5
Weiwu Song, Mi Wang, Wei Su, Quanwei Lu, Xianghui Xiao, Juan Cai, Zhen Zhang, Shaoqi Li, Pengtao Li, Juwu Gong, Wankui Gong, Haihong Shang, Aiying Liu, Junwen Li, Tingting Chen, Qun Ge, Yuzhen Shi, Youlu Yuan
MBI9915 is an introgression cotton line with excellent fiber quality. It was obtained by advanced backcrossing and continuous inbreeding from an interspecific cross between the upland cotton (Gossypium hirsutum) cultivar CCRI36 as the recurrent parent and the sea island cotton (G. barbadense) cultivar Hai1, as the donor parent. To study the genetic effects of the introgressed chromosome segments in G. hirsutum, an F2 secondary segregating population of 1537 individuals was created by crossing MBI9915 and CCRI36, and an F2:3 population was created by randomly selecting 347 individuals from the F2 generation...
2017: PloS One
https://www.readbyqxmd.com/read/28928763/comparative-mapping-and-candidate-gene-analysis-of-ssiia-associated-with-grain-amylopectin-content-in-barley-hordeum-vulgare-l
#6
Xiangyun Fan, Juan Zhu, Wenbin Dong, Yuandong Sun, Chao Lv, Baojian Guo, Rugen Xu
Amylopectin concentration in barley endosperm has important effects on grain quality and end-use. In this study, quantitative trait locus (QTL) analysis together with genome-wide association studies (GWAS) were performed to identify markers linked to grain amylopectin content respectively using a doubled haploid (DH) population of 178 lines and a collection of 185 diverse barley germplasms both genotyped by genotyping-by-sequencing (GBS). A stable QTL on chromosome 7H and 11 associated single nucleotide polymorphisms (SNPs) were detected...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28927400/genome-sequencing-of-the-staple-food-crop-white-guinea-yam-enables-the-development-of-a-molecular-marker-for-sex-determination
#7
Muluneh Tamiru, Satoshi Natsume, Hiroki Takagi, Benjamen White, Hiroki Yaegashi, Motoki Shimizu, Kentaro Yoshida, Aiko Uemura, Kaori Oikawa, Akira Abe, Naoya Urasaki, Hideo Matsumura, Pachakkil Babil, Shinsuke Yamanaka, Ryo Matsumoto, Satoru Muranaka, Gezahegn Girma, Antonio Lopez-Montes, Melaku Gedil, Ranjana Bhattacharjee, Michael Abberton, P Lava Kumar, Ismail Rabbi, Mai Tsujimura, Toru Terachi, Wilfried Haerty, Manuel Corpas, Sophien Kamoun, Günter Kahl, Hiroko Takagi, Robert Asiedu, Ryohei Terauchi
BACKGROUND: Root and tuber crops are a major food source in tropical Africa. Among these crops are several species in the monocotyledonous genus Dioscorea collectively known as yam, a staple tuber crop that contributes enormously to the subsistence and socio-cultural lives of millions of people, principally in West and Central Africa. Yam cultivation is constrained by several factors, and yam can be considered a neglected "orphan" crop that would benefit from crop improvement efforts...
September 19, 2017: BMC Biology
https://www.readbyqxmd.com/read/28924253/quantitative-trait-loci-responsible-for-sharp-eyespot-resistance-in-common-wheat-ci12633
#8
Xujiang Wu, Kai Cheng, Renhui Zhao, Shujiang Zang, Tongde Bie, Zhengning Jiang, Ronglin Wu, Derong Gao, Boqiao Zhang
Sharp eyespot is a major fungal disease of wheat caused by Rhizoctonia cerealis in cool and humid environments worldwide. In this study, 224 single seed descent derived F13, F14 and F15 recombinant inbred lines (RILs) from the cross between CI12633 (a resistant cultivar) and Yangmai 9 (a susceptible cultivar) were assessed for sharp eyespot resistance (R.cerealis isolate R0301) in field and greenhouse conditions in three growing seasons. Different agronomic characteristics were also evaluated in the field with no disease infection...
September 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28922774/crop-model-assisted-phenomics-and-genome-wide-association-study-for-climate-adaptation-of-indica-rice-1-phenology
#9
Michael Dingkuhn, Richard Pasco, Julie M Pasuquin, Jean Damo, Jean-Christophe Soulié, Louis-Marie Raboin, Julie Dusserre, Abdoulaye Sow, Baboucarr Manneh, Suchit Shrestha, Alpha Balde, Tobias Kretzschmar
Phenology and time of flowering are crucial determinants of rice adaptation to climate variation. A previous study characterized flowering responses of 203 diverse indica rices (the ORYTAGE panel) to ten environments in Senegal (six sowing dates) and Madagascar (two years and two altitudes) under irrigation in the field. This study used the physiological phenology model RIDEV V2 to heuristically estimate component traits of flowering such as cardinal temperatures (base temperature (Tbase) and optimum temperature), basic vegetative phase, photoperiod sensitivity and cold acclimation, and to conduct a genome-wide association study for these traits using 16 232 anonymous single-nucleotide polymorphism (SNP) markers...
July 10, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28922773/crop-model-assisted-phenomics-and-genome-wide-association-study-for-climate-adaptation-of-indica-rice-2-thermal-stress-and-spikelet-sterility
#10
Michael Dingkuhn, Richard Pasco, Julie Mae Pasuquin, Jean Damo, Jean-Christophe Soulié, Louis-Marie Raboin, Julie Dusserre, Abdoulaye Sow, Baboucarr Manneh, Suchit Shrestha, Tobias Kretzschmar
Low night and high day temperatures during sensitive reproductive stages cause spikelet sterility in rice. Phenotyping of tolerance traits in the field is difficult because of temporal interactions with phenology and organ temperature differing from ambient. Physiological models can be used to separate these effects. A 203-accession indica rice diversity panel was phenotyped for sterility in ten environments in Senegal and Madagascar and climate data were recorded. Here we report on sterility responses while a companion study reported on phenology...
July 10, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28922359/a-first-linkage-map-and-downy-mildew-resistance-qtl-discovery-for-sweet-basil-ocimum-basilicum-facilitated-by-double-digestion-restriction-site-associated-dna-sequencing-ddradseq
#11
Robert Pyne, Josh Honig, Jennifer Vaiciunas, Adolfina Koroch, Christian Wyenandt, Stacy Bonos, James Simon
Limited understanding of sweet basil (Ocimum basilicum L.) genetics and genome structure has reduced efficiency of breeding strategies. This is evidenced by the rapid, worldwide dissemination of basil downy mildew (Peronospora belbahrii) in the absence of resistant cultivars. In an effort to improve available genetic resources, expressed sequence tag simple sequence repeat (EST-SSR) and single nucleotide polymorphism (SNP) markers were developed and used to genotype the MRI x SB22 F2 mapping population, which segregates for response to downy mildew...
2017: PloS One
https://www.readbyqxmd.com/read/28919901/introgression-of-shoot-fly-atherigona-soccata-l-moench-resistance-qtls-into-elite-post-rainy-season-sorghum-varieties-using-marker-assisted-backcrossing-mabc
#12
Sunita Gorthy, Lakshmi Narasu, Anil Gaddameedi, Hari C Sharma, Anuradha Kotla, Santosh P Deshpande, Ashok K Are
Shoot fly (Atherigona soccata L. Moench) is a serious pest in sorghum production. Management of shoot fly using insecticides is expensive and environmentally un-safe. Developing host-plant resistance is the best method to manage shoot fly infestation. Number of component traits contribute for imparting shoot fly resistance in sorghum and molecular markers have been reported which were closely linked to QTLs controlling these component traits. In this study, three QTLs associated with shoot fly resistance were introgressed into elite cultivars Parbhani Moti (= SPV1411) and ICSB29004 using marker assisted backcrossing (MABC)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28916814/expression-of-brown-midrib-in-a-spontaneous-sorghum-mutant-is-linked-to-a-5-utr-deletion-in-lignin-biosynthesis-gene-sbcad2
#13
Huang Li, Yinghua Huang
Brown midrib (bmr) mutants in sorghum (Sorghum bicolor (L.) Moench) and several other C4 grasses are associated with reduced lignin concentration, altered lignin composition and improved cell wall digestibility, which are desirable properties in biomass development for the emerging lignocellulosic biofuel industry. Studying bmr mutants has considerably expanded our understanding of the molecular basis underlying lignin biosynthesis and perturbation in grasses. In this study, we performed quantitative trait locus (QTL) analysis, identified and cloned a novel cinnamyl alcohol dehydrogenase allele (SbCAD2) that has an 8-bp deletion in its 5'-untranslated region (UTR), conferring the spontaneous brown midrib trait and lignin reduction in the sorghum germplasm line PI 595743...
September 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28916559/omics-analyses-of-trichoderma-reesei-cbs999-97-and-qm6a-indicate-a-relevance-of-female-fertility-for-cazyme-and-transporter-levels
#14
Doris Tisch, Kyle R Pomraning, James R Collett, Michael Freitag, Scott E Baker, Chia-Ling Chen, Paul Wei-Che Hsu, Yu Chien Chuang, Andre Schuster, Christoph Dattenböck, Eva Stappler, Michael Sulyok, Stefan Böhmdorfer, Josua Oberlerchner, Ting-Fang Wang, Monika Schmoll
The filamentous fungus Trichoderma reesei is predominantly found in the tropics, but also in more temperate regions, such as Europe and is widely known as producer of high amounts of plant cell wall degrading enzymes. We sequenced the genome of the sexually competent isolate CBS999.97, which is phenotypically different from female sterile QM6a, but can cross sexually with QM6a. Transcriptome data for growth on cellulose showed that entire CAZyme families are consistently differentially regulated between these strains...
September 15, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28913655/quantitative-trait-loci-for-resistance-to-stripe-rust-of-wheat-revealed-using-global-field-nurseries-and-opportunities-for-stacking-resistance-genes
#15
Firdissa E Bokore, Richard D Cuthbert, Ron E Knox, Harpinder S Randhawa, Colin W Hiebert, Ron M DePauw, Asheesh K Singh, Arti Singh, Andrew G Sharpe, Amidou N'Diaye, Curtis J Pozniak, Curt McCartney, Yuefeng Ruan, Samia Berraies, Brad Meyer, Catherine Munro, Andy Hay, Karim Ammar, Julio Huerta-Espino, Sridhar Bhavani
Quantitative trait loci controlling stripe rust resistance were identified in adapted Canadian spring wheat cultivars providing opportunity for breeders to stack loci using marker-assisted breeding. Stripe rust or yellow rust, caused by Puccinia striiformis Westend. f. sp. tritici Erikss., is a devastating disease of common wheat (Triticum aestivum L.) in many regions of the world. The objectives of this research were to identify and map quantitative trait loci (QTL) associated with stripe rust resistance in adapted Canadian spring wheat cultivars that are effective globally, and investigate opportunities for stacking resistance...
September 14, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28913578/loci-on-chromosomes-1a-and-2a-affect-resistance-to-tan-yellow-spot-in-wheat-populations-not-segregating-for-tsn1
#16
Manisha Shankar, Dorthe Jorgensen, Julian Taylor, Ken J Chalmers, Rebecca Fox, Grant J Hollaway, Stephen M Neate, Mark S McLean, Elysia Vassos, Hossein Golzar, Robert Loughman, Diane E Mather
QTL for tan spot resistance were mapped on wheat chromosomes 1A and 2A. Lines were developed with resistance alleles at these loci and at the tsn1 locus on chromosome 5B. These lines expressed significantly higher resistance than the parent with tsn1 only. Tan spot (syn. yellow spot and yellow leaf spot) caused by Pyrenophora tritici-repentis is an important foliar disease of wheat in Australia. Few resistance genes have been mapped in Australian germplasm and only one, known as tsn1 located on chromosome 5B, is known in Australian breeding programs...
September 14, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28913347/haplotypes-for-type-degree-and-rate-of-marbling-in-cattle-are-syntenic-with-human-muscular-dystrophy
#17
Sally S Lloyd, Edward J Steele, Jose L Valenzuela, Roger L Dawkins
Traditional analyses of a QTL on Bota 19 implicate a surfeit of candidates, but each is of marginal significance in explaining the deposition of healthy, low melting temperature fat within marbled muscle of Wagyu cattle. As an alternative approach, we have used genomic, multigenerational segregation to identify 14 conserved, ancestral 20 Mb haplotypes. These determine the degree and rate of marbling in Wagyu and other breeds of cattle. The melting temperature of intramuscular fat is highly heritable and traceable by haplotyping...
2017: International Journal of Genomics
https://www.readbyqxmd.com/read/28903982/mapping-loci-that-control-tuber-and-foliar-symptoms-caused-by-pvy-in-autotetraploid-potato-solanum-tuberosum-l
#18
Washington da Silva, Jason Ingram, Christine A Hackett, Joseph J Coombs, David Douches, Glenn Bryan, Walter De Jong, Stewart Gray
Potato tuber necrotic ringspot disease (PTNRD) is a tuber deformity associated with infection by the tuber necrotic strain of Potato virus Y (PVY(NTN)). PTNRD negatively impacts tuber quality and marketability and poses a serious threat to seed and commercial potato production worldwide. PVY(NTN) symptoms differ in the cultivars Waneta and Pike: Waneta expresses severe PTNRD and foliar mosaic with vein and leaf necrosis, whereas Pike does not express PTNRD and mosaic is the only foliar symptom. To map loci that influence tuber and foliar symptoms, 236 F1 progeny of a cross between Waneta and Pike were inoculated with PVY(NTN) isolate NY090029 and genotyped using 12,808 Potato SNPs...
September 13, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28901681/a-vigs-screen-identifies-immunity-in-the-arabidopsis-pla-1-accession-to-viruses-in-two-different-genera-of-the-geminiviridae
#19
Maria Ines Reyes, Miguel A Flores-Vergara, Orlene Guerra-Peraza, Cyprian Rajabu, Jigar Desai, Yokiko H Hiromoto-Ruiz, Joseph Ndunguru, Linda Hanley-Bowdoin, Susanne Kjemtrup, Jose T Ascencio-Ibáñez, Dominique Robertson
Geminiviruses are DNA viruses that cause severe crop losses in different parts of the world, and there is a need for genetic sources of resistance to help combat them. Arabidopsis has been used as a source for virus resistance genes that derive from alterations in essential host factors. We used a virus-induced gene silencing (VIGS) vector derived from the geminivirus Cabbage leaf curl virus (CaLCuV) to assess natural variation in virus-host interactions in 190 Arabidopsis accessions. Silencing of CH-42, encoding a protein needed to make chlorophyll, was used as a visible marker to discriminate asymptomatic accessions from those showing resistance...
September 13, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28895580/new-path-towards-a-better-rice-architecture
#20
Reynante L Ordonio, Makoto Matsuoka
New plant type (NPT) or ideal plant architecture (IPA) is an attractive way of increasing yield potential by promoting high resource use efficiency combined with better lodging resistance. In a recent paper in Cell Research, Wang et al. describe how a QTL they identified could bring about the desired NPT architecture by elucidating the role of its encoded gene in controlling the stability of IPA1/OsSPL14, a previously reported NPT protein, in the context of ubiquitination.
September 12, 2017: Cell Research
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