The intersectional hybrid between Weigela hortensis and W. maximowiczii (Caprifoliaceae)

Morphologically intermediate plants between Weigela hortensis (Siebold & Zucc.) K.Koch and W. maximowiczii (S.Moore) Rehder have been found in Miyagi and Yamagata Pref., northern Japan. Quantitative character analyses of flowers, pollen stainability and molecular analyses indicated that the intermediate plants were hybrids of those two species. This is the first record of an intersectional hybrid with W. maximowiczii (sect. Weigelastrum ) as one of the parent species. The morphological differences among hybrid individuals imply the possibility of backcrosses or formation of second or later generations of hybrids, although those may be quite rare because of a low frequency of viable pollen grains. Causes of hybridization between two distantly-related species in Weigela are discussed. © 2002 The Linnean Society of London, Botanical Journal of the Linnean Society , 2002, 138 , 369–380.     

樟树全基因组调查

樟树是我国特有的珍贵用材和经济树种,富含多糖多酚、萜类等次生代谢物质,是香精香料、油脂化工和医药等的重要原料树种。本研究采用高通量测序技术(Illumina HiseqTM2000)首次测定了樟树基因组大小,并利用生物信息方法估计樟树杂合率、重复序列情况和GC含量等基因组信息,为全基因组测序策略的选择提供依据。主要结论如下:(1)樟树基因组大小粗略估计为760 Mb左右;(2)樟树基因组有较高的杂合率和一定的重复,杂合率约为0.65%;(3)由于樟树杂合率较高,全基因组鸟枪法策略不适合该基因组测序分析,可尝试使用BAC-to-BAC策略或fosmid策略,有利于樟树基因组的序列拼接和组装。     

Longings and belongings: Indian American youth identity,folk dance competitions,and the construction of ‘tradition’

This article examines the development of the ‘cultural competition’ as a site for the production of multiple identities by Indian American youths on American college campuses. Through the examination of two categories of folk dance competitions (bhangra and raas-garba) at a private university in Washington, DC, we argue that these competitions appear to resist hybridity and produce rhetoric that marginalizes diasporic culture in favour of the ‘pure’ and ‘authentic’ culture of the homeland. However, the goal of expressing uncontaminated ‘authentic’ culture is not realized as diasporic identities and cultures consistently interrupt and undermine homogenizing narratives of ‘tradition’ and ‘authenticity’. We also demonstrate that these folk dance groups often reinforce an ethno-regional distinctiveness rather than a hybrid or pan-Indian identity.     

Hybridisation in a Case of Diamond Theft in Rural Sierra Leone

ABSTRACT

Drawing on cultural studies, the concept of hybridity has emerged in peace and conflict studies as an important critique of the fragile failed/state discourse, and the binaries whereby the modern state is often contrasted with traditional or non-state actors. The concept is also challenged for reproducing the very binaries that it seeks to overcome and lacking analytical vigour. The paper addresses these critiques by exploring a case of diamond theft in rural Sierra Leone. It suggests an analytical shift from interaction between state institutions (police) and non-state authorities (traditional leaders) to focusing on processes of hybridisation through the enactment and performativity of authority. This is an analytical move from preconceived cultural and political entities to the subject and the simultaneous quality of how he or she assembles and projects authority. It is in the subject’s strategies and practices at the micro level that we clearly see how hybridisation processes occur.     

The distribution of random amplified polymorphic DNA (RAPD) diversity amongst populations of Isotoma petraea (Lobeliaceae)

RAPDs were generated from plants of six populations of Isotoma petraea F. Muell. The species occurs on rock outcrops in southern and western Australia, with populations exhibiting different breeding systems, including complete autogamy, varying levels of outbreeding and complex hybridity. Non-metric multidimensional scaling (nMDS) analysis of the random amplified polymorphic DNA (RAPD) data set clearly resolved all populations. The Pigeon Rock population, which is home to both complex hybrid and structural homozygote plants, was divided into those two groups by the nMDS analysis. There was little diversity in highly autogamous populations, but levels were higher in the outbred Yackeyackine population. All complex hybrid populations and plants possessed numerous genetic system-specific RAPDs, some of which were shown to be held in fixed heterozygosity. Estimating G _ST using RAPDs has been problematical due to their dominance, and analytical methods usually rely on knowledge of the selfing rate or assume Hardy–Weinberg equilibrium. This assumption does not hold when populations exhibit fixed heterozygosity, and an alternative method, Shannon's Index, was used to partition genetic diversity. The distribution of genetic diversity fit expectations for an inbreeding species, with most of the variation (87.5%) occurring between populations. This compares to an average RAPD-based G _ST of 59.6% for inbreeding species generally and 15.5% for outbreeding species.     

Aboriginal youth,hip hop and the politics of identification

This paper explores the identity work taking place around contemporary subcultural hip hop amongst Australian indigenous youth in two disadvantaged urban locations. Previous work on Aboriginal hip hop has been attentive to the interface between tradition and modernity. However, existing scholarship has lacked a deeper ethnographic understanding of the dynamics between youth and parent cultures, and the tensions between the two generations. This article is based on research with young hip hop enthusiasts, community activists and educators. It deals with the cultural politics of identification and sees hip hop practice as associated with a process in which Aboriginality is crystallized as a principal affiliation and as offering an account for experiences of social marginalization. Far from being an outlet for expressing a prior or essential Aboriginality, hip hop as cultural practice is associated with the production of particular identifications.     

Becoming cosmopolitan? Hybridity and intercultural encounters amongst 1.5 generation Chinese migrants in New Zealand

The 1.5 generation migrants are often presented by scholars as the vanguard of new cosmopolitan possibilities. Their hybrid identities and intercultural competencies are viewed as evidence for new ways of approaching difference in diverse societies. This paper examines these claims in relation to Chinese 1.5 generation migrants in New Zealand, focusing on their experiences of negotiating the family and early life, and possibilities for becoming cosmopolitan. By drawing insights from ‘everyday cosmopolitanism’, we examine how hybrid identities both facilitate and undermine capacities to overcome difference and alter the power dynamics within social worlds. This demonstrates that everyday cosmopolitanism is not easily achieved but rather oscillates around strategies for fitting in that sometimes reinforce uneven social positions. We argue for caution in accounts of the 1.5 generation and recognition of the ways that cosmopolitanism is socially situated, subject to the multiple pressures, and enacted within the uneven power relations of society.     

Afropolitan projects: African immigrant identities and solidarities in the United States

This article explores how Africans born or raised in the United States employ ethnicity to understand their racial and cultural identities. I argue that African immigrants engage positive narratives about Africa along with their experiences of anti-black racism to articulate identities as “Africans of the world”. I call this articulation of identity Afropolitan projects. The Afropolitan as an ethnicity is not meant to shield Africans from anti-black racism, but instead helps articulate a particular relationship to this form of inequality. The following analysis derives from a qualitative case study of a voluntary association comprising Ghanaians primarily raised in the United States. I find that the group’s identity is as much about being black, African, and American as it is about being middle-class, Christian, and heterosexual. Through their Afropolitan projects, this group emphasizes solidarities with a global middle-class heterosexual patriarchy while foreclosing solidarities with working class, queer, and other people of colour.     

Passing as hybrid: Arab-Palestinian teachers in Jewish schools

In this paper I examine how Arab-Palestinians who teach Arabic in Jewish schools appropriate performative identity strategies through passing as hybrid to gain inclusion into the schools. The paradox is that although these teachers are recruited specifically because they are Arabs, they are expected by teachers and students to conceal their Arabness. I argue that because of the ethno-national bright boundaries in Israel, which do not encourage integration but hybridization into roles defined by the state, Arabs cannot and mostly do not want to pass as Israeli-Jews but as good Arabs who do not reside beyond the binarism Jew/Arab but are in-betweens.     

Molecular phylogenetic analysis of the evolution of complex hybridity in Isotoma petraea

Complex hybridity is a rare diploid genetic system of plants, extensively characterized in Oenothera, in which heterozygosity for one or more reciprocal translocations is maintained by means of autogamy and a balanced lethal system. It is visible at metaphase I of meiosis as rings or chains of chromosomes held together by terminalized chiasmata. Phylogenetic analysis based on 274 random amplified polymorphic DNA markers showed that in the Australian endemic Isotoma petraea (Lobeliaceae) the genetic system had a single origin, as a ring-of-six, in the Pigeon Rock population. It subsequently spread to other populations to produce hybrids incorporating additional chromosomes into the rings. Our research supports the suggestion that complex hybridity is an evolutionary response to intense inbreeding and selected because it allows masking of accumulated deleterious alleles.