当前位置： SCI文献检索 > PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA期刊下所有文献 > Seed exchange networks, ethnicity, and sorghum diversity.

Seed exchange networks, ethnicity, and sorghum diversity.

Abstract：

:Recent studies investigating the relationship between crop genetic diversity and human cultural diversity patterns showed that seed exchanges are embedded in farmers' social organization. However, our understanding of the social processes involved remains limited. We investigated how farmers' membership in three major social groups interacts in shaping sorghum seed exchange networks in a cultural contact zone on Mount Kenya. Farmers are members of residence groups at the local scale and of dialect groups clustered within larger ethnolinguistic units at a wider scale. The Chuka and Tharaka, who are allied in the same ethnolinguistic unit, coexist with the Mbeere dialect group in the study area. We assessed farmers' homophily, propensity to exchange seeds with members of the same group, using exponential random graph models. We showed that homophily is significant within both residence and ethnolinguistic groups. At these two levels, homophily is driven by the kinship system, particularly by the combination of patrilocal residence and ethnolinguistic endogamy, because most seeds are exchanged among relatives. Indeed, residential homophily in seed exchanges results from local interactions between women and their in-law family, whereas at a higher level, ethnolinguistic homophily is driven by marriage endogamy. Seed exchanges and marriage ties are interrelated, and both are limited between the Mbeere and the other groups, although frequent between the Chuka and Tharaka. The impact of these social homophily processes on crop diversity is discussed.

journal_name

Proc Natl Acad Sci U S A

journal_title

Proceedings of the National Academy of Sciences of the United States of America

authors

Labeyrie V,Thomas M,Muthamia ZK,Leclerc C

doi

10.1073/pnas.1513238112

subject

Has Abstract

pub_date

2016-01-05 00:00:00

pages

98-103

issue

1

eissn

0027-8424

issn

1091-6490

pii

1513238112

journal_volume

113

pub_type

杂志文章

相关文献

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA文献大全
  • C-type lectin receptor LSECtin-mediated apoptotic cell clearance by macrophages directs intestinal repair in experimental colitis.

    abstract：:Epithelial barrier disruption is a major cause of inflammatory bowel disease (IBD); however, the cellular and molecular regulation of intestinal epithelial homeostasis remains largely undefined. Here, we show that the C-type lectin receptor LSECtin (Clec4g) on macrophages is required for protection against dextran sul...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.1804094115

    authors： Yang Z,Li Q,Wang X,Jiang X,Zhao D,Lin X,He F,Tang L

    更新日期：2018-10-23 00:00:00

  • Cell-free synthesis of adenovirus 2 proteins programmed by fractionated messenger RNA: a comparison of polypeptide products and messenger RNA lengths.

    abstract：:Cytoplasmic RNA extracted from human tissue culture cells infected with adenovirus type 2 was used to program protein synthesis in a cell-free system derived from mammalian cells. Analysis of the protein product by polyacrylamide gel electrophoresis revealed ten adenovirus-specific polypeptides. Five of these were fur...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.71.7.2756

    authors： Anderson CW,Lewis JB,Atkins JF,Gesteland RF

    更新日期：1974-07-01 00:00:00

  • PAT1, a microtubule-interacting protein, recognizes the basolateral sorting signal of amyloid precursor protein.

    abstract：:In epithelial cells, sorting of membrane proteins to the basolateral surface depends on the presence of a basolateral sorting signal (BaSS) in their cytoplasmic domain. Amyloid precursor protein (APP), a basolateral protein implicated in the pathogenesis of Alzheimer's disease, contains a tyrosine-based BaSS, and muta...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.95.25.14745

    authors： Zheng P,Eastman J,Vande Pol S,Pimplikar SW

    更新日期：1998-12-08 00:00:00

  • Characterization of reconnecting vortices in superfluid helium.

    abstract：:When two vortices cross, each of them breaks into two parts and exchanges part of itself for part of the other. This process, called vortex reconnection, occurs in classical and superfluids, and in magnetized plasmas and superconductors. We present the first experimental observations of reconnection between quantized ...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.0806002105

    authors： Bewley GP,Paoletti MS,Sreenivasan KR,Lathrop DP

    更新日期：2008-09-16 00:00:00

  • Modulation of cell death by Bcl-XL through caspase interaction.

    abstract：:The caspases are cysteine proteases that have been implicated in the execution of programmed cell death in organisms ranging from nematodes to humans. Many members of the Bcl-2 family, including Bcl-XL, are potent inhibitors of programmed cell death and inhibit activation of caspases in cells. Here, we report a direct...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.95.2.554

    authors： Clem RJ,Cheng EH,Karp CL,Kirsch DG,Ueno K,Takahashi A,Kastan MB,Griffin DE,Earnshaw WC,Veliuona MA,Hardwick JM

    更新日期：1998-01-20 00:00:00

  • Quantitative expression profiling of identified neurons reveals cell-specific constraints on highly variable levels of gene expression.

    abstract：:The postdevelopmental basis of cellular identity and the unique cellular output of a particular neuron type are of particular interest in the nervous system because a detailed understanding of circuits responsible for complex processes in the brain is impeded by the often ambiguous classification of neurons in these c...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.0705827104

    authors： Schulz DJ,Goaillard JM,Marder EE

    更新日期：2007-08-07 00:00:00

  • A "public" T-helper epitope of the E7 transforming protein of human papillomavirus 16 provides cognate help for several E7 B-cell epitopes from cervical cancer-associated human papillomavirus genotypes.

    abstract：:We have identified a major T-cell epitope, amino acids 48-54 (DRAHYNI, in one-letter code) in the E7 open reading frame protein of human papillomavirus (HPV) type 16. Lymph node cells from mice immunized with synthetic peptides containing DRAHYNI proliferated and produced interleukin when challenged in vitro with pept...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.88.13.5887

    authors： Tindle RW,Fernando GJ,Sterling JC,Frazer IH

    更新日期：1991-07-01 00:00:00

  • Association of aerobic glycolysis with the structural connectome reveals a benefit-risk balancing mechanism in the human brain.

    abstract：:Aerobic glycolysis (AG), that is, the nonoxidative metabolism of glucose, contributes significantly to anabolic pathways, rapid energy generation, task-induced activity, and neuroprotection; yet high AG is also associated with pathological hallmarks such as amyloid-β deposition. An important yet unresolved question is...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.2013232118

    authors： Chen Y,Lin Q,Liao X,Zhou C,He Y

    更新日期：2021-01-05 00:00:00

  • An evolutionary scenario for the transition to undifferentiated multicellularity.

    abstract：:The evolutionary transition from single cells toward multicellular forms of life represents one of the major transitions in the evolution of complex organisms. In this transition, single autonomously reproducing cells became parts of larger reproducing entities that eventually constituted a new unit of selection. The ...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.0335420100

    authors： Pfeiffer T,Bonhoeffer S

    更新日期：2003-02-04 00:00:00

  • Atomic structure of the Campylobacter jejuni flagellar filament reveals how ε Proteobacteria escaped Toll-like receptor 5 surveillance.

    abstract：:Vertebrates, from zebra fish to humans, have an innate immune recognition of many bacterial flagellins. This involves a conserved eight-amino acid epitope in flagellin recognized by the Toll-like receptor 5 (TLR5). Several important human pathogens, such as Helicobacter pylori and Campylobacter jejuni, have escaped TL...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.2010996117

    authors： Kreutzberger MAB,Ewing C,Poly F,Wang F,Egelman EH

    更新日期：2020-07-21 00:00:00

  • Advancing a clinically relevant perspective of the clonal nature of cancer.

    abstract：:Cancers frequently arise as a result of an acquired genomic instability and the subsequent clonal evolution of neoplastic cells with variable patterns of genetic aberrations. Thus, the presence and behaviors of distinct clonal populations in each patient's tumor may underlie multiple clinical phenotypes in cancers. We...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.1104009108

    authors： Ruiz C,Lenkiewicz E,Evers L,Holley T,Robeson A,Kiefer J,Demeure MJ,Hollingsworth MA,Shen M,Prunkard D,Rabinovitch PS,Zellweger T,Mousses S,Trent JM,Carpten JD,Bubendorf L,Von Hoff D,Barrett MT

    更新日期：2011-07-19 00:00:00

  • Analgesia mediated by soluble epoxide hydrolase inhibitors is dependent on cAMP.

    abstract：:Pain is a major health concern even though numerous analgesic agents are available. Side effects and lack of wide-spectrum efficacy of current drugs justify efforts to better understand pain mechanisms. Stabilization of natural epoxy-fatty acids (EFAs) through inhibition of the soluble epoxide hydrolase (sEH) reduces ...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.1101073108

    authors： Inceoglu B,Wagner K,Schebb NH,Morisseau C,Jinks SL,Ulu A,Hegedus C,Rose T,Brosnan R,Hammock BD

    更新日期：2011-03-22 00:00:00

  • UV irradiation induces a postreplication DNA damage checkpoint.

    abstract：:Eukaryotic cells irradiated with high doses of UV exhibit cell-cycle responses referred to as G(1)/S, intraS, and G(2)/M checkpoints. After a moderate UV dose that approximates sunlight exposure and is lethal to fission yeast checkpoint mutants, we found unexpectedly that these cell-cycle responses do not occur. Inste...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.0607343103

    authors： Callegari AJ,Kelly TJ

    更新日期：2006-10-24 00:00:00

  • Multibranch activity in basal and tuft dendrites during firing of layer 5 cortical neurons in vivo.

    abstract：:Layer 5 pyramidal neurons process information from multiple cortical layers to provide a major output of cortex. Because of technical limitations it has remained unclear how these cells integrate widespread synaptic inputs located in distantly separated basal and tuft dendrites. Here, we obtained in vivo two-photon ca...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.1312599110

    authors： Hill DN,Varga Z,Jia H,Sakmann B,Konnerth A

    更新日期：2013-08-13 00:00:00

  • Optimizing transmembrane domain helicity accelerates insulin receptor internalization and lateral mobility.

    abstract：:Transmembrane (TM) domains of integral membrane proteins are generally thought to be helical. However, a Gly-Pro sequence within the TM domain of the insulin receptor is predicted to act as a helix breaker. CD analyses of model TM peptides in a lipid-like environment show that substitution of Gly and Pro by Ala enhanc...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.90.12.5762

    authors： Goncalves E,Yamada K,Thatte HS,Backer JM,Golan DE,Kahn CR,Shoelson SE

    更新日期：1993-06-15 00:00:00

  • Diverse roles of the tumor necrosis factor family member TRANCE in skeletal physiology revealed by TRANCE deficiency and partial rescue by a lymphocyte-expressed TRANCE transgene.

    abstract：:Tumor necrosis factor-related, activation-induced cytokine (TRANCE), a tumor necrosis factor family member, mediates survival of dendritic cells in the immune system and is required for osteoclast differentiation and activation in the skeleton. We report the skeletal phenotype of TRANCE-deficient mice and its rescue b...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.200294797

    authors： Kim N,Odgren PR,Kim DK,Marks SC Jr,Choi Y

    更新日期：2000-09-26 00:00:00

  • Multiple functional domains of the heparin molecule.

    abstract：:Affinity-fractionated porcine heparin was randomly scissioned by chemical techniques to give hexasaccharides, octasaccharides, decasaccharides, and mucopolysaccharide fragments of approximately 14 residues and approximately 16 residues that were able to complex with the protease inhibitor. Direct measurements of the k...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.78.2.829

    authors： Oosta GM,Gardner WT,Beeler DL,Rosenberg RD

    更新日期：1981-02-01 00:00:00

  • gamma-Aminobutyric acid exerts a local inhibitory action on the axon terminal of bipolar cells: evidence for negative feedback from amacrine cells.

    abstract：:It is well-established morphologically that bipolar cells, the second-order neurons in the vertebrate retina, make reciprocal synapses with amacrine cells in the inner plexiform layer. However, neither the property nor the physiological function of the feedback synapse is understood. Autoradiographic and immunohistoch...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.84.10.3501

    authors： Tachibana M,Kaneko A

    更新日期：1987-05-01 00:00:00

  • Phylogenetic analyses reveal the shady history of C4 grasses.

    abstract：:Grasslands cover more than 20% of the Earth's terrestrial surface, and their rise to dominance is one of the most dramatic events of biome evolution in Earth history. Grasses possess two main photosynthetic pathways: the C(3) pathway that is typical of most plants and a specialized C(4) pathway that minimizes photores...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.0909672107

    authors： Edwards EJ,Smith SA

    更新日期：2010-02-09 00:00:00

  • Chromosomal drive and the evolution of meiotic nondisjunction and trisomy in humans.

    abstract：:Trisomy is a genetic abnormality of considerable medical importance. The most familiar example is trisomy 21, which causes Down Syndrome [Cummings, M. R. (1988) Human Heredity: Principles and Issues (West Publishing Company, New York)]. In a classic paper, Axelrod and Hamilton [Axelrod, R. & Hamilton, W. D. (1981) Sci...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.95.5.2361

    authors： Day T,Taylor PD

    更新日期：1998-03-03 00:00:00

  • Population genetics in the forensic DNA debate.

    abstract：:The use of matching variable number of tandem repeat (VNTR) profiles to link suspects with crimes is potentially very powerful, but it has been quite controversial. Initial debate over laboratory procedures has largely given way to debate over the statistical and population genetic issues involved in calculating the f...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章,评审

    doi：10.1073/pnas.89.24.11654

    authors： Weir BS

    更新日期：1992-12-15 00:00:00

  • Phosphorylation and dephosphorylation of dihydropyridine-sensitive voltage-dependent Ca2+ channel in skeletal muscle membranes by cAMP- and Ca2+-dependent processes.

    abstract：:The phosphorylation and dephosphorylation of the dihydropyridine-sensitive Ca2+ channel was studied in transverse-tubule membranes isolated from rabbit skeletal muscle. Exposure of these membranes to either the cAMP-dependent protein kinase or a Ca2+/calmodulin-dependent protein kinase resulted in a rapid phosphorylat...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.83.11.3733

    authors： Hosey MM,Borsotto M,Lazdunski M

    更新日期：1986-06-01 00:00:00

  • Enhancing T1 magnetic resonance imaging contrast with internalized gadolinium(III) in a multilayer nanoparticle.

    abstract：:Multifunctional nanoparticles for biomedical applications have shown extraordinary potential as contrast agents in various bioimaging modalities, near-IR photothermal therapy, and for light-triggered therapeutic release processes. Over the past several years, numerous studies have been performed to synthesize and enha...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.1701944114

    authors： Marangoni VS,Neumann O,Henderson L,Kaffes CC,Zhang H,Zhang R,Bishnoi S,Ayala-Orozco C,Zucolotto V,Bankson JA,Nordlander P,Halas NJ

    更新日期：2017-07-03 00:00:00

  • Long-term reconstitution of the mouse hematopoietic system by embryonic stem cell-derived fetal liver.

    abstract：:Murine embryonic stem (ES) cells are permanent blastocyst-derived cell lines capable of contributing to a wide variety of tissues, including the germ line, after injection into host blastocysts. Recently, we have shown that ES cells can produce all of the cells of the developing fetus after aggregation with developmen...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.88.17.7514

    authors： Forrester LM,Bernstein A,Rossant J,Nagy A

    更新日期：1991-09-01 00:00:00

  • Streamlined analysis schema for high-throughput identification of endogenous protein complexes.

    abstract：:Immunoprecipitation followed by mass spectrometry (IP/MS) has recently emerged as a preferred method in the analysis of protein complex components and cellular protein networks. Targeting endogenous protein complexes of higher eukaryotes, particularly in large-scale efforts, has been challenging due to cellular hetero...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.0912599106

    authors： Malovannaya A,Li Y,Bulynko Y,Jung SY,Wang Y,Lanz RB,O'Malley BW,Qin J

    更新日期：2010-02-09 00:00:00

  • Dependence of long-term depression on postsynaptic metabotropic glutamate receptors in visual cortex.

    abstract：:Long-term depression (LTD) is held relevant to memory and learning. Its induction is known to require postsynaptic calcium increases. However, the source of these calcium increases remains unclear. In visual cortex slices, LTD was induced by tetanization after blockade of N-methyl-D-aspartate (NMDA) and non-NMDA ionot...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.90.8.3650

    authors： Kato N

    更新日期：1993-04-15 00:00:00

  • Analysis of human tumors and human malignant cell lines for BK virus-specific DNA sequences.

    abstract：:Most humans in the United States have been infected with BK virus (BKV), a human papovavirus. Because BKV has oncogenic properties, we have investigated whether it may be a cause of human cancer. Basic principles of tumor virology imply that BKV-induced tumors should contain BKV DNA sequences. Therefore, we assayed (b...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.75.1.454

    authors： Wold WS,Mackey JK,Brackmann KH,Takemori N,Rigden P,Green M

    更新日期：1978-01-01 00:00:00

  • Common polymorphism in the oxytocin receptor gene (OXTR) is associated with human social recognition skills.

    abstract：:The neuropeptides oxytocin and vasopressin are evolutionarily conserved regulators of social perception and behavior. Evidence is building that they are critically involved in the development of social recognition skills within rodent species, primates, and humans. We investigated whether common polymorphisms in the g...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.1302985111

    authors： Skuse DH,Lori A,Cubells JF,Lee I,Conneely KN,Puura K,Lehtimäki T,Binder EB,Young LJ

    更新日期：2014-02-04 00:00:00

  • Nck influences preosteoblastic/osteoblastic migration and bone mass.

    abstract：:Migration of the cells in osteoblastic lineage, including preosteoblasts and osteoblasts, has been postulated to influence bone formation. However, the molecular bases that link preosteoblastic/osteoblastic cell migration and bone formation are incompletely understood. Nck (noncatalytic region of tyrosine kinase; coll...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.1518253112

    authors： Aryal A C S,Miyai K,Izu Y,Hayata T,Notomi T,Noda M,Ezura Y

    更新日期：2015-12-15 00:00:00

  • Large and persistent electrical currents enter the transected lamprey spinal cord.

    abstract：:The electrical currents at the surface of the proximal portion of an isolated and transected lamprey spinal cord were measured with an extracellular vibrating probe. Soon after transection, currents of about 0.5 mA/cm2 enter the cut surface of the spinal cord. These currents fall to about a quarter of their initial va...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.77.2.1209

    authors： Borgens RB,Jaffe LF,Cohen MJ

    更新日期：1980-02-01 00:00:00