Genetics of Combination Rice Hybrids at Heading Stage

CHEN Bin

doi:10.19303/j.issn.1008-0384.2020.09.008

Volume 35 Issue 9

Sep. 2020

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Article Navigation > Fujian Journal of Agricultural Sciences > 2020 > 35(9): 974-979

CHEN B. Genetics of Combination Rice Hybrids at Heading Stage [J]. Fujian Journal of Agricultural Sciences，2020，35（9）：974−979 doi: 10.19303/j.issn.1008-0384.2020.09.008

Citation:

CHEN B. Genetics of Combination Rice Hybrids at Heading Stage [J]. Fujian Journal of Agricultural Sciences，2020，35（9）：974−979 doi: 10.19303/j.issn.1008-0384.2020.09.008

CHEN B. Genetics of Combination Rice Hybrids at Heading Stage [J]. Fujian Journal of Agricultural Sciences，2020，35（9）：974−979 doi: 10.19303/j.issn.1008-0384.2020.09.008

Citation:

CHEN B. Genetics of Combination Rice Hybrids at Heading Stage [J]. Fujian Journal of Agricultural Sciences，2020，35（9）：974−979 doi: 10.19303/j.issn.1008-0384.2020.09.008

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Genetics of Combination Rice Hybrids at Heading Stage

doi: 10.19303/j.issn.1008-0384.2020.09.008

CHEN Bin

Agricultural Technology Extension Station, Songxi County, Songxi, Fujian　353500, China

Received Date: 2020-02-13
Rev Recd Date: 2020-08-05
Publish Date: 2020-09-28

Abstract

Abstract

Objective The very complex genetic characteristics at heading stage that dictate the adaptability of a rice variety to ecological zones were studied. Method Using Huazhan as male parent, populations of 6 generations (i.e., P₁, P₂, F₁, F₂, BC_1-1, and BC_1-2) of combination rice hybrids, Tianyou Huazhan (TH), Hengfengyou Huazhan (HH), and Wufengyou Huazhan (WH), were constructed. Genetic analysis on the heredity of plant height was performed using the "main gene+polygene hybrid genetic model" on the populations. Result MX1-AD-ADI was found to be the best fit genetic model for the heading of all 3 hybrids. On F₂, the main genetic heritability of TH was 10.13%, that of HH 12.64%, and that of WH 13.65%; and, the polygenic heritability of TH was 88.45%, that of HH 85.94%, and that of WH 83.66%. For the BC_1-1 population, the main gene heritability ranged from 15.16% to 23.66%, and the polygene from 65.33% to 69.75%. For the two populations, the genetic patterns at the heading stage were mainly controlled by the polygenes. But the heading of the 3 backcrossing BC_1-2 populations with the maintainer as recurrent parent were affected by both the main genes and polygenes with the former exerting a heritability between 42.03% and 47.78 %, and the latter between 45.17% and 50.77%. Conclusion Rice heading was highly complicatedly controlled by multiple genes. In breeding, selection of heading period would, therefore, require a thorough analysis beforehand on the genetic characteristics of the specific target population.
- Rice (Oryza sativa L.),
- heading stage,
- main genes+polygenic,
- genetic analysis

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References(20)

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