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Deploying QTL-seq rapid identification and separation of the major QTLs of tassel branch number for fine-mapping in advanced maize populations.
Ni, Jixing; You, Chong; Chen, Zhengjie; Tang, Dengguo; Wu, Haimei; Deng, Wujiao; Wang, Xueying; Yang, Jinchang; Bao, Ruifan; Liu, Zhiqin; Meng, Pengxu; Rong, Tingzhao; Liu, Jian.
Afiliação
  • Ni J; Maize Research Institute, Sichuan Agricultural University, No. 211 Huiming Road, Wenjiang District, Chengdu, 611130 Sichuan China.
  • You C; Maize Research Institute, Sichuan Agricultural University, No. 211 Huiming Road, Wenjiang District, Chengdu, 611130 Sichuan China.
  • Chen Z; Sichuan Advanced Agricultural & Industrial Institute, China Agriculture University, No.8 Xingyuan Road, Xinjin District, Chengdu, 611430 Sichuan China.
  • Tang D; Maize Research Institute, Sichuan Agricultural University, No. 211 Huiming Road, Wenjiang District, Chengdu, 611130 Sichuan China.
  • Wu H; Maize Research Institute, Sichuan Agricultural University, No. 211 Huiming Road, Wenjiang District, Chengdu, 611130 Sichuan China.
  • Deng W; Maize Research Institute, Sichuan Agricultural University, No. 211 Huiming Road, Wenjiang District, Chengdu, 611130 Sichuan China.
  • Wang X; Maize Research Institute, Sichuan Agricultural University, No. 211 Huiming Road, Wenjiang District, Chengdu, 611130 Sichuan China.
  • Yang J; Maize Research Institute, Sichuan Agricultural University, No. 211 Huiming Road, Wenjiang District, Chengdu, 611130 Sichuan China.
  • Bao R; Maize Research Institute, Sichuan Agricultural University, No. 211 Huiming Road, Wenjiang District, Chengdu, 611130 Sichuan China.
  • Liu Z; Maize Research Institute, Sichuan Agricultural University, No. 211 Huiming Road, Wenjiang District, Chengdu, 611130 Sichuan China.
  • Meng P; Maize Research Institute, Sichuan Agricultural University, No. 211 Huiming Road, Wenjiang District, Chengdu, 611130 Sichuan China.
  • Rong T; Maize Research Institute, Sichuan Agricultural University, No. 211 Huiming Road, Wenjiang District, Chengdu, 611130 Sichuan China.
  • Liu J; Maize Research Institute, Sichuan Agricultural University, No. 211 Huiming Road, Wenjiang District, Chengdu, 611130 Sichuan China.
Mol Breed ; 43(12): 88, 2023 Dec.
Article em En | MEDLINE | ID: mdl-38045561
ABSTRACT
The tassel competes with the ear for nutrients and shields the upper leaves, thereby reducing the yield of grain. The tassel branch number (TBN) is a pivotal determinant of tassel size, wherein the reduced TBN has the potential to enhance the transmission of light and reduce the consumption of nutrients, which should ultimately result in increased yield. Consequently, the TBN has emerged as a vital target trait in contemporary breeding programs that focus on compact maize varieties. In this study, QTL-seq technology and advanced population mapping were used to rapidly identify and dissect the major effects of the TBN on QTL. Advanced mapping populations (BC4F2 and BC4F3) were derived from the inbred lines 18-599 (8-11 TBN) and 3237 (0-1 TBN) through phenotypic recurrent selection. First, 13 genomic regions associated with the TBN were detected using quantitative trait locus (QTL)-seq and were located on chromosomes 2 and 5. Subsequently, validated loci within these regions were identified by QTL-seq. Three QTLs for TBN were identified in the BC4F2 populations by traditional QTL mapping, with each QTL explaining the phenotypic variation of 6.13-18.17%. In addition, for the major QTL (qTBN2-2 and qTBN5-1), residual heterozygous lines (RHLs) were developed from the BC4F2 population. These two major QTLs were verified in the RHLs by QTL mapping, with the phenotypic variation explained (PVE) of 21.57% and 30.75%, respectively. Near-isogenic lines (NILs) of qTBN2-2 and qTBN5-1 were constructed. There were significant differences between the NILs in TBN. These results will enhance our understanding of the genetic basis of TBN and provide a solid foundation for the fine-mapping of TBN. Supplementary Information The online version contains supplementary material available at 10.1007/s11032-023-01431-y.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2023 Tipo de documento: Article