Wang Yan, Wang Jingjing, Chen Dali, Hui Zhenning, Hu Xiaowen
State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, Lanzhou 730000, China.
Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Lanzhou 730000, China.
Plants (Basel). 2023 Aug 14;12(16):2934. doi: 10.3390/plants12162934.
var. has attracted great attention because of the anticancer value of its alkaloids and the potential use of the species for ecological restoration. However, the scarcity of high-quality seeds has significantly hindered the cultivation and efficient utilization of this species. Understanding how seeds respond to maternal environmental conditions is crucial for developing high-yield and top-notch seed accessions, but the available knowledge in this area is limited. Here, we determined the effect of shading treatments on seed development, seed quality, and yield. Compared to the control, shade significantly increased the seed germination rate and 1000-seed weight by 29.2% and 25.6%, respectively. Regardless of light conditions, the seed germination rate and 1000-seed weight decreased by 7.13% and 37.5%, respectively, as the fruit positioned from base to apical. The seed yield per plant was 27.9% higher under shade than under the control treatment. The structural equation model showed that shade promoted seed yield through increasing flowers per reproductive branch and seed numbers per capsule. These findings suggest that adjusting shading conditions and optimizing inflorescence development can lead to high-yield and high-quality seeds. Additionally, prioritizing the number of flowers per reproductive branch and seeds per capsule in breeding programs can further enhance the seed yield of . var. .
变种因其生物碱的抗癌价值以及该物种在生态恢复方面的潜在用途而备受关注。然而，高质量种子的稀缺严重阻碍了该物种的栽培和高效利用。了解种子如何响应母本环境条件对于培育高产和优质种子种质至关重要，但该领域的现有知识有限。在此，我们确定了遮荫处理对种子发育、种子质量和产量的影响。与对照相比，遮荫显著提高了种子发芽率和千粒重，分别提高了29.2%和25.6%。无论光照条件如何，随着果实从基部到顶部位置，种子发芽率和千粒重分别下降了7.13%和37.5%。遮荫处理下单株种子产量比对照处理高27.9%。结构方程模型表明，遮荫通过增加每个生殖枝的花朵数和每个蒴果的种子数来提高种子产量。这些发现表明，调整遮荫条件和优化花序发育可获得高产和优质种子。此外，在育种计划中优先考虑每个生殖枝的花朵数和每个蒴果的种子数可进一步提高变种的种子产量。
