Y.-L. Ren

Hangzhou University, Hang-hsien, Zhejiang Sheng, China

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Publications (2)3.79 Total impact

  • Y.-L. Ren · C.-H. Shi · J.-G. Wu · H.-Z. Zhang
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    ABSTRACT: A diallel design with eight parents of Brassica napus were conducted to analyze the genetic effects , heritabilities and genetic correlations from diploid embryo, cytoplasm and diploid maternal plant for the contents of Glutamic acid (Glu), Glycine (Gly) and Arginine (Arg) of rapeseed cake, by using the genetic model for seed quantitative traits of diploid plant. The results indicated that these amino acids in rapeseed cake were simultaneously controlled by the genetic effects from embryo genes, cytoplasmic genes and maternal plant genes, except for the cytoplasmic effect of Arg. The contents of Glu and Gly in rapeseed cake were mainly controlled by maternal genetic effects, but the embryo effect and maternal effect were almost equal for Arg. The maternal heritabilities were larger than the embryo or cytoplasmic heritabilities for three amino acids. The selection effect could be expected in rapeseed quality breeding, because of the larger maternal additive and cytoplasmic effects. The positive embryo dominance correlations (RD) were more important for the pairwise traits among Glu, Gly and Arg in rape-seed cake, although the negative maternal additive (RAM) or dominance RDM) correlations were significant for some pairwise traits of amino acids.
  • C T Li · C H Shi · J G Wu · H M Xu · H Z Zhang · Y.L. Ren
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    ABSTRACT: The selection of an appropriate sampling strategy and a clustering method is important in the construction of core collections based on predicted genotypic values in order to retain the greatest degree of genetic diversity of the initial collection. In this study, methods of developing rice core collections were evaluated based on the predicted genotypic values for 992 rice varieties with 13 quantitative traits. The genotypic values of the traits were predicted by the adjusted unbiased prediction (AUP) method. Based on the predicted genotypic values, Mahalanobis distances were calculated and employed to measure the genetic similarities among the rice varieties. Six hierarchical clustering methods, including the single linkage, median linkage, centroid, unweighted pair-group average, weighted pair-group average and flexible-beta methods, were combined with random, preferred and deviation sampling to develop 18 core collections of rice germplasm. The results show that the deviation sampling strategy in combination with the unweighted pair-group average method of hierarchical clustering retains the greatest degree of genetic diversities of the initial collection. The core collections sampled using predicted genotypic values had more genetic diversity than those based on phenotypic values.
    Theoretical and Applied Genetics 05/2004; 108(6):1172-6. DOI:10.1007/s00122-003-1536-1 · 3.79 Impact Factor

Publication Stats

22 Citations
3.79 Total Impact Points


  • 2004
    • Hangzhou University
      Hang-hsien, Zhejiang Sheng, China