Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (29): 8-15.doi: 10.11924/j.issn.1000-6850.casb2021-0912

Special Issue: 生物技术 玉米

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QTL of Kernel Yield of Maize and Its Components’ Traits: Research Progress

XIE Wen1,2(), HUO Chuan3, PENG Chaoying1,2, HUO Shiping1,2()   

  1. 1Chongqing Three Gorges University, Wanzhou, Chongqing 404100
    2Chongqing Three Gorges Academy of Agricultural Sciences, Wanzhou, Chongqing 404155
    3Extension Station of Agricultural Technology in Sichuan Ziyang, Ziyang, Sichuan 641400
  • Received:2021-09-24 Revised:2022-02-05 Online:2022-10-15 Published:2022-10-14
  • Contact: HUO Shiping E-mail:2717298520@qq.com;huosp4936@sina.com

Abstract:

In order to promote the application of molecular marker-assisted selection in maize breeding, the research progress of QTL of kernel yield of maize and its components’ traits in recent 30 years was summed up. The results showed that there were 5-9 QTLs for kernel yield, and they were mainly distributed on chromosome 1, 2, 5, 6, 7, 8 and 9. There were 3-6 QTLs for the kernel row number, kernel number per row and 100-kernel weight, and they were mainly distributed on chromosome 1, 2, 3, 4, 5, 6, 7 and 8. These QTLs were distributed in clusters on several main chromosomes and formed QTL enrichment regions, and they could explain about 25% of the phenotypic variation in traits. QTLs of most traits mainly manifested as additive, dominant, partial dominant or superdominant effects, and QTLs of some traits showed genetic × environment interaction. It indicated that QTLs of kernel yield and its components’ traits had common chromosomal carriers, the breeding selection should be carried out in multiple environments and with large number of samples, and those QTLs that could be expressed stably in different environments were more suitable for breeding selection. The QTL study on ear number per plant, plant traits and stress resistance should be strengthened.

Key words: maize, yield components, chromosome, QTL, genetic effect

CLC Number: