PDF(Pubmed)
Abstract：
Sesamum indicum L. (Pedaliaceae) is one of the most economically important oil crops in the world, thanks to the high oil content of its seeds and its nutritional value. It is cultivated all over the world, mainly in Asia and Africa. Well adapted to arid environments, sesame offers a good opportunity as an alternative subsistence crop for farmers in Africa, particularly Niger, to cope with climate change. For the first time, the variation in genome size among 75 accessions of the Nigerien germplasm was studied. The sample was collected throughout Niger, revealing various morphological, biochemical and phenological traits. For comparison, an additional accession from Thailand was evaluated as an available Asian representative. In the Niger sample, the 2C DNA value ranged from 0.77 to 1 pg (753 to 978 Mbp), with an average of 0.85 ± 0.037 pg (831 Mbp). Statistical analysis showed a significant difference in 2C DNA values among 58 pairs of Niger accessions (p-value < 0.05). This significant variation indicates the likely genetic diversity of sesame germplasm, offering valuable insights into its possible potential for climate-resilient agriculture. Our results therefore raise a fundamental question: is intraspecific variability in the genome size of Nigerien sesame correlated with specific morphological and physiological traits?
摘要：
芝麻(Pedaliaceae)是世界上经济上最重要的油料作物之一,由于其种子的高油含量和营养价值。它在世界各地种植，主要在亚洲和非洲。很好地适应了干旱的环境，芝麻为非洲农民提供了一个很好的机会，尤其是尼日尔,以应对气候变化。第一次,研究了75种尼日尔种质之间基因组大小的变化。样本是在尼日尔各地收集的，揭示各种形态，生化和物候性状。为了比较，泰国的另一个加入被评估为可用的亚洲代表。在尼日尔的样本中,2CDNA值范围为0.77至1pg(753至978Mbp)，平均值为0.85±0.037pg（831Mbp）。统计分析表明，58对尼日尔种质之间的2CDNA值存在显着差异（p值<0.05）。这种显著的变异表明了芝麻种质的遗传多样性。为适应气候变化的农业的潜在潜力提供有价值的见解。因此，我们的结果提出了一个基本问题：尼日尔芝麻基因组大小的种内变异性与特定的形态和生理性状相关吗？
