Breeding Effects and Genetic Compositions of a Backbone Parent (Fengbazhan) of Modern indica Rice in China

doi:10.1016/j.rsci.2022.07.001

Abstract

Zhao Lei, Zhou Shaochuan, Wang Chongrong, Li Hong, Huang Daoqiang, Wang Zhidong, Zhou Degui, Chen Yibo, Gong Rong, Pan Yangyang. Breeding Effects and Genetic Compositions of a Backbone Parent (Fengbazhan) of Modern indica Rice in China[J]. Rice Science, 2022, 29(5): 397-401.

Figures/Tables 2

Fig. 1. Breeding effects of Fengbazhan (FBZ) in China. A, FBZ-derived varieties bred by our team. Huazhan was cooperatively bred by our team and China National Rice Research Institute. Seven elite varieties are shown in boxes. B, Planting areas of FBZ-derived varieties in China. C, Main locations where FBZ-derived varieties are cultivated in China. D, Percentage of the planting area of FBZ-derived hybrids with respect to the total planting area of hybrid rice in China. The unit is × 104 hm2. E, Percentage of planting area of FBZ-derived varieties (including hybrid rice and conventional rice) with respect to the total rice area in China (NATESC, 2019). The unit is × 104 hm2. F, Released FBZ-derived conventional rice varieties in Guangdong Province of China from 2000 to 2020.

Fig. 2. Genetic features of varieties derived from Fengbazhan (FBZ). A, Neighbor-joining tree of 138 varieties. B, Inheritance pattern of chromosome 6 in the breeding of the latest FBZ-derived varieties. Genotypes were drawn based on penta-primer amplification refractory mutation markers. Genes contributing to modern indica rice varieties are marked on the top. White (FBZ) and red (others) bars denote the parental origin of the segments. Haplotypes of Wx, Hd1 and Pi2-Pid3-Pid2 loci were marked with arrows. C, Allelic effects of Hd1 locus on the entire growth duration. D, Effects of Wx allelic diversity on AC. G1, wxa varieties (n = 14); G2, wxb varieties (n = 26); G3, wx-FBZ varieties (n = 67). E-G, Effects of Pi2-Pid3-Pid2 locus on Zhong B (E), Zhong C (F), and total (G) groups of the blast fungus. G-I, +Pi2+Pid3+Pid2 varieties (n = 67); G-II, +Pi2-Pid3-Pid2 varieties (n = 7); G-III, -Pi2-Pid3-Pid2 varieties (n = 19). AC, Amylose content; RF, Resistance frequency to total rice blast fungus in Guangdong Province, China. Different lowercase letters denote significant differences (P < 0.05).

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