RESUMO
We investigated the growth traits (tree height, diameter at the breast, crown diameter), fruiting traits (total number of cones in 7 consecutive fruiting years) and resistance to disease and insect of 551 half-sib families of Pinus koraiensis superior trees in 29-year-old in Hongwei seed orchard of Lushuihe, Jilin Province, with the method of multi-trait comprehensive evaluation and combining with six traits. The results showed that all the traits were significantly different among different families or blocks. Phenotypic variation coefficient of different traits ranged from 13.9% to 61.0%. The extremely significant difference and high variation coefficients were beneficial for elite families evaluation and selection. The family heritability of volume, seed yield and resistance to disease and insect (the values were 0.47, 0.52, 0.48, respectively) were higher than single plant heritability (the values were 0.37, 0.07, 0.10, respectively). There was a extremely significant positive correlation between growth traits, fruiting traits and resistance to disease and insect. 28 elite families were selected with a selection rate of 5%, with the genetic gains of volume, seed yield and resistance to disease and insect being 16.8%, 71.4% and 0.5%, respectively. Seven elite individuals were selected from the elite families with a selection rate of 2%, with the genetic gains of volume, seed yield and resistance to disease and insect being 66.8%, 80.9% and 0.7%, respectively. These elite families and individual plants showed obvious advantages, which could guide the thinning of clonal seed orchards and provide breeding materials for the construction of high-generation seed orchards.
Assuntos
Adaptação Fisiológica , Pinus/fisiologia , Animais , Variação Genética , Insetos , Fenótipo , Melhoramento Vegetal , ÁrvoresRESUMO
This qualitative study investigates the everyday food choices of 21 Chinese sojourners living in two different localities in the UK. Findings from a thematic analysis of semi-structured interviews reveal how participants adopt a food consumption pattern, negotiating between ordinary and extraordinary food choices, including home-made Chinese food, Chinese restaurant food, global brands, British food, to "foods of the world". Their zooming in and out of different food consumption choices reflects the transformative identity of the sojourners, between their student role during the week and becoming tourists at the weekends, meshing work and tourism during their sojourning in the UK. Theoretically this paper extends the limited understanding of sojourners, showing how their complex food choices reflect their swift transformative identity. Findings also illustrate how consumption patterns adopted by sojourners living in rural areas differ from the ones living in an urban setting.
