Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (33): 1-9.doi: 10.11924/j.issn.1000-6850.casb2022-0062

Special Issue: 生物技术 水稻

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Breeding Introgression Line ‘Jijing 88’ (hd2/hd4) with Molecular Selection

LI Rongtian1,2(), SHI Liu1,2, HUANG Liying1,2, LIU Changhua1,2,3()   

  1. 1School of Life Sciences, Heilongjiang University/Key Laboratory of Molecular Biology, College of Heilongjiang Province, Harbin 150080
    2Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin 150500
    3College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080
  • Received:2022-02-02 Revised:2022-05-02 Online:2022-11-25 Published:2022-11-22
  • Contact: LIU Changhua E-mail:lirongtian07@aliyun.com;liuchanghua70@163.com

Abstract:

The aim of this study is to transform rice heading stage genes hd2 and hd4 into an excellent variety ‘Jijing 88’, and further develop rice ‘Jijing 88’ (hd2/hd4) introgression lines which are suitable for planting in the northern part of Heilongjiang Province. With ‘Jijing 88’ as the receptor and ‘Kongyu 131’ as the donor, ‘Jijing 88’(hd2/hd4) introgression lines were created by molecular selection and backcrossing. The growth period, agronomic characters and yield of the introgression lines were identified in the third accumulated temperature area of cold region. ‘Jijing 88’ was crossed with ‘Kongyu 131’, ‘Jijing 88’ was used as the recurrent parent for 4 backcrosses, and the backcross offspring were self-crossed for 2 times. In each generation, Hd2-Caps and Hd4-Caps were used for foreground selection, and SSR markers were used for background selection. Thus, ‘Jijing 88’(hd2/hd4) introgression lines-1 and ‘Jijing 88’ (hd2/hd4) introgression lines-2 were obtained. Both of them had similar heading stage to ‘Kongyu 131’ and plant type characteristics to ‘Jijing 88’, but the yield was significantly higher than that of ‘Kongyu 131’. The successful breeding of rice ‘Jijing 88’ (hd2/hd4) introgression lines has made it possible for the lines to be used in the third accumulated temperature region and the lower limit of the second accumulated temperature region in Heilongjiang Province.

Key words: rice, ‘Jijing88’, molecular selection, heading stage gene, introgression line

CLC Number: