| QTL mapping analysis of erucic acid content in rapeseed grains under drought conditions |
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| DOI：10.7606/j.issn.1000-7601.2024.03.06 |
| Key Words: winter rapseed arid environment erucic acid QTL mapping |
| Author Name | Affiliation | | DANG Linxue | Promotion Center of Agricultural Technology in Zhuanglang County, Pingliang, Gansu 744000, China | | DONG Xiaoyun | State Key Laboratory of Arid and Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | ZHENG Guoqiang | State Key Laboratory of Arid and Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WANG Ying | State Key Laboratory of Arid and Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WANG Xiaoxia | State Key Laboratory of Arid and Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | GONG Yongjie | State Key Laboratory of Arid and Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WEI Jiaping | State Key Laboratory of Arid and Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | CUI Junmei | State Key Laboratory of Arid and Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WU Zefeng | State Key Laboratory of Arid and Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | FANG Yan | State Key Laboratory of Arid and Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | ZHAO Caixia | Agricultural Research Institute of Tibet Academy of Agriculture and Animal Husbandry Sciences, Lasa, Xizang 850030, China | | LIU Zigang | State Key Laboratory of Arid and Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| To explore molecular genetic mechanism of the erucic acid accumulation in winter rapeseed grains under drought conditions, F1, F2 and F2∶3 populations derived from 17NTS57 (high erucic acid) × CY12PXW-6-1 (low erucic acid) were used as materials to analyze the genetic localization of erucic acid in this study. The results showed that a total of 7 QTLs for erucic acid content were detected using the F2∶3 population in two conditions, including 4 QTLs for erucic acid content in Tianshui condition and 3 QTLs for erucic acid content in Dingxi condition. Two main QTLs were detected in the Tianshui condition, namely [STBX]qEATC08.2[STBZ] and [STBX]qEATC09[STBZ], distributed on chromosomes C08 and C09, with a phenotypic contribution rate of over 20%. [STBX]qEATA10 (Tianshui)[STBZ] and [STBX]qEADA10[STBZ] (Dingxi) were in the same interval of A10 chromosome, [JP2]and their phenotypic contributions in both environments were 10.42% and 12.70%, respectively. [STBX]qEATC09[STBZ] and [STBX]qEADC09[STBZ] [JP2]were located in the same interval of the C09 chromosome, with phenotypic contribution rates of 20.0% and 19.34% in the two conditions, respectively, making them the main QTLs for co\|localization. Three QTLs ([STBX]qEATC08.1(Tianshui), qEATC08.2(Tianshui), qEADC07[STBZ](Dingxi)) were detected only in one condition, among which two minor modification sites ([STBX]qEATC08.1[STBZ] and [STBX]qEADC07[STBZ]) had a positive additive effect. The major QTLs of qEA.A[STBX]10 and qEA.C09[STBZ] mapping on chromosomes A10 and C09 can be used for molecular marker\|assisted selection for the improvement of erucic acid content in rapeseed under drought conditions. |
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