Details

Autor(en) / Beteiligte

• Fang, Caochuang
• Wang, Zhaoyang
• Wang, Pengfei
• Song, Yixian
• Ahmad, Ali
• Dong, Faming
• Hong, Dengfeng
• Yang, Guangsheng

Titel

Heterosis Derived From Nonadditive Effects of the BnFLC Homologs Coordinates Early Flowering and High Yield in Rapeseed ( Brassica napus L.)

Ist Teil von

• Frontiers in plant science, 2022-02, Vol.12, p.798371-798371

Ort / Verlag

Switzerland: Frontiers Media S.A

Erscheinungsjahr

2022

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• Early flowering facilitates crops to adapt multiple cropping systems or growing regions with a short frost-free season; however, it usually brings an obvious yield loss. In this study, we identified that the three genes, namely, , , and , are the major determinants for the flowering time (FT) variation of two elite rapeseed ( L.) accessions, i.e., 616A and R11. The early-flowering alleles (i.e., and ) and late-flowering allele (i.e., ) from R11 were introgressed into the recipient parent 616A through a breeding strategy of marker-assisted backcross, giving rise to eight homozygous near-isogenic lines (NILs) associated with these three loci and 19 NIL hybrids produced by the mutual crossing of these NILs. Phenotypic investigations showed that NILs displayed significant variations in both FT and plant yield (PY). Notably, genetic analysis indicated that , , and have additive effects of 1.446, 1.365, and 1.361 g on PY, respectively, while their dominant effects reached 3.504, 2.991, and 3.284 g, respectively, indicating that the yield loss caused by early flowering can be successfully compensated by exploring the heterosis of FT genes in the hybrid NILs. Moreover, we further validated that the heterosis of FT genes in PY was also effective in non-NIL hybrids. The results demonstrate that the exploration of the potential heterosis underlying the FT genes can coordinate early flowering (maturation) and high yield in rapeseed ( L.), providing an effective strategy for early flowering breeding in crops.