Acta Agriculturae Zhejiangensis ›› 2025, Vol. 37 ›› Issue (2): 365-380.DOI: 10.3969/j.issn.1004-1524.20240475

• Horticultural Science • Previous Articles     Next Articles

Comparison of leaf and seed quality of different varieties (strains) of Torreya grandis ‘Merrillii’ in Zhejiang Province, China

JIANG Zhengchu1(), HAO Qichun1, LI Yi1, WANG Junxin2, LIAO Longjian3, XIE Qiandan1, YU Chenliang1, YU Weiwu1, CHEN Rong1,*()   

  1. 1. The State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
    2. Agriculture and Rural Bureau in Lin’an District of Hangzhou, Hangzhou 311399, China
    3. Qunju Family Farm in Fengshuling Town of Chun’an, Chun’an 311700, Zhejiang, China
  • Received:2024-06-04 Online:2025-02-25 Published:2025-03-20
  • Contact: CHEN Rong

Abstract:

To explore the differences in leaf and seed quality among different varieties (strains) of Torreya grandis in Zhejiang, this study focused on 12 different varieties (strains) of T. grandi grown under the same environment and site conditions. Physiological indicators such as leaf phenotype, seed and fruit appearance, and nutritional quality were measured. Correlation analysis and principal component analysis were conducted on the data, and a quality evaluation model for the seeds of these 12 varieties (strains) was established. The results showed that the leaf length of the 12 T. grandis varieties (strains) ranged from 15.239 mm to 21.322 mm, with Pan’an Changfei having the longest leaves; leaf width ranged from 2.691 mm to 3.775 mm, with Changzi Xiangya having the narrowest leaves. The kernel yield varied from 45.737% to 79.481%, with Xiangya having the highest yield; oil content ranged from 40.702% to 54.284%, with Zaoyuan having the highest oil content. Soluble protein content ranged from 15.321 mg·g-1 to 32.079 mg·g-1, with Longfeng Xifei having the highest content; unsaturated fatty acid content ranged from 83.384% to 90.540%, with Dongfei No.1 having the highest content; linoleic acid content ranged from 41.394% to 48.170%, with Dongfei No.2 having the highest content; and junceic acid content ranged from 7.850% to 12.963%, with Anyuan having the highest content. After principal component analysis, five principal component factors were extracted, and a quality evaluation model for T. grandis seeds was established. Based on all indicators, the ranking among varieties (strains) was: Zaoyuan>Longfeng Xifei>Anyuan>Dongfei No.2>Liqin Xifei>Xiangya>Dongfei No.1>Xiaozi Xiangya>Pan’an Changfei>Yuansu>Changzi Xiangya>Dongbaizhu. The research results can lay the foundation for the selection and breeding of stable and high-yielding new varieties of T. grandis, thereby better protecting and utilizing the germplasm resources of T. grandis.

Key words: Torreya grandis, variety (line), leaf, seed, nutritional component

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