Identification of QTLs for relative root traits associated with phosphorus efficiency in two culture systems in Brassica napus

Wang, Wei; Zhang, Ying; Ding, Guangda; White, Philip J.; Broadley, Martin R.; Hammond, John P.; Jin, Kemo; Cai, Hongmei; Xu, Fangsen; Shi, Lei

Abstract

© 2019, Springer Nature B.V. Modifications of root system morphology and architecture are considered important strategies of plant tolerance to phosphorus (P) deficiency. However, the effect of culture system on the responses of root traits to P deficiency is not well documented. In this study, the responses of root traits to P deficiency were recorded in a Brassica napus double haploid (DH) population consisting of 182 lines derived from a cross between cultivar ‘Tapidor’ and ‘Ningyou 7’ using an ‘agar’ system and a ‘pouch and wick’ system. Under P deficient conditions, more DH lines had greater total root length, primary root length, total lateral root length, mean lateral root length and less lateral root density in the ‘pouch and wick’ system than the ‘agar’ system. Ten and two quantitative trait loci (QTLs) were detected for the relative root traits in the ‘agar’ system and the ‘pouch and wick’ system, respectively. The QTL for the same trait in the ‘agar’ system did not overlap with that in the ‘pouch and wick’ system. Two and one QTL clusters identified in the ‘agar’ system were located on chromosome A09 (Cluster1 and Cluster2) and C04 (Cluster3), respectively. RLRN_A04b, RSDW_A09a and Cluster1 were found to affect the seed yield and/or yield-related traits in two field trials. Overall, this study demonstrated a significant impact of different culture systems on the responses of root traits to P deficiency and on the detection of QTLs for the relative root traits, and identified three major QTLs that could be employed for marker assisted selection of P efficient cultivars.

Citation

Wang, W., Zhang, Y., Ding, G., White, P. J., Broadley, M. R., Hammond, J. P., …Shi, L. (2019). Identification of QTLs for relative root traits associated with phosphorus efficiency in two culture systems in Brassica napus. Euphytica, 215(11), Article 192. https://doi.org/10.1007/s10681-019-2512-4

• Journal Article Type: Article
• Acceptance Date: Oct 18, 2019
• Online Publication Date: Oct 31, 2019
• Publication Date: 2019-10
• Deposit Date: Nov 5, 2019
• Publicly Available Date: Nov 1, 2020
• Journal: Euphytica
• Print ISSN: 0014-2336
• Electronic ISSN: 1573-5060
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 215
• Issue: 11
• Article Number: 192
• DOI: https://doi.org/10.1007/s10681-019-2512-4
• Keywords: Agronomy and Crop Science; Plant Science; Genetics; Horticulture
• Public URL: https://nottingham-repository.worktribe.com/output/3060428
• Publisher URL: https://link.springer.com/article/10.1007%2Fs10681-019-2512-4
• Additional Information: This is a post-peer-review, pre-copyedit version of an article published in Euphytica. The final authenticated version is available online at: http://dx.doi.org/10.1007/s10681-019-2512-4.