Publications by authors named "Xue-Zhen Sun"

Background: Salinity is a major abiotic stress seriously hindering crop yield. Development and utilization of tolerant varieties is the most economical way to address soil salinity. Upland cotton is a major fiber crop and pioneer plant on saline soil and thus its genetic architecture underlying salt tolerance should be extensively explored.

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Article Synopsis
  • Cotton is a crucial natural fiber and a significant source of nutrition for humans and livestock, and this study focuses on the genetic architecture of its seed nutrients through a genome-wide association study (GWAS) involving 196 germplasm resources.
  • The research found high genetic diversity and phenotypic variation, revealing a negative correlation between seed protein and oil content, likely linked to oleic acid levels.
  • The study identified 47 significant SNP markers and 28 candidate quantitative trait loci (QTL) regions associated with key seed nutrients, enhancing the understanding of genetic factors influencing cottonseed nutrient composition and aiding the development of improved cotton cultivars.
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To clarify the effects of cotton straw returning on the composition and contents of nu-trients in different particle sizes of aggregates, two treatments with or without cotton straw returning were tested in continuous three years. After three years straw treatments, we collected undisturbed soil within 0-5, 5-10, 10-20 and 20-30 cm soil layers, and to measure the composition, soil organic carbon, nitrogen, phosphorus and potassium contents in different particle sizes of aggregates classified using dry sieving. Returning cotton straw into the field significantly increased particle contents of 2-5 mm and >5 mm aggregates in 0-5 cm soil layer, while the content of <0.

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