Abstract
Crop inflorescences are directly related to yield. The wild tomato species Solanum pimpinellifolium displays rich genetic diversity. However, limited information is available regarding the inflorescence of this wild population. Here, 300 Solanum pimpinellifolium accessions were investigated to uncover the genetics of inflorescence length (IFL) over two seasons. The results revealed significant genetic variation in IFL among S. pimpinellifolium accessions, with a continuous distribution ranging from 3.68 to 38.13 cm. Few accessions exhibited long inflorescences. The IFL was greatly influenced by environmental factors and the 3rd, 4th and 5th IFL performed relatively stable. The broad-sense heritability ranged from 53.40 to 80.51%. One accession LA1256 showed the longest IFL and most stable across two seasons. Six-generation populations were constructed by crossing LA1256 with the cultivar Moneymaker, possessing very short IFL to understand the genetic mechanism. F1 progeny clearly indicated that long inflorescence was a recessive trait. The further genetic analysis indicated that IFL fitted the E-0 genetic model and the heritability estimates ranged from 50.40 to 65.38% in B1, B2 and F2 populations. The IFL was mainly controlled by major genes and modified by the polygene. These findings obtained in this study would pave the way for a detailed understanding of the inflorescence of wild species S. pimpinellifolium and provide the strategy for the manipulation of tomato improvement.
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The datasets generated during and/or analyzed during the current study are available from the corresponding authors on reasonable request.
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Funding
This research was funded by National Natural Science Foundation of China (Grant number: 31991185), the Fundamental Research Funds for Central Nonprofit Scientific Institution (Grant number: IVF-BRF2021005), the Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture, China, and the Science and Technology Innovation Program of the Chinese Academy of Agricultural Sciences (Grant number: CAASASTIP-IVFCAAS).
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LJM and LL conceived the project and revised the manuscript. HJL conceived the project and wrote the manuscript. LX performed data analysis and wrote the manuscript. ZH, LXX, PF, PCY, SWY, ZM, XMM, ZC and SLF performed some surveys on the field trials. All authors contributed to the article and approved the submitted version.
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Hu, J., Li, X., Zhang, H. et al. Genetic analysis of inflorescence length in Solanum pimpinellifolium. Genet Resour Crop Evol (2023). https://doi.org/10.1007/s10722-023-01829-9
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DOI: https://doi.org/10.1007/s10722-023-01829-9