KASP Assays of Disease Resistance Genes from 130 Watermelon Varieties and Germplasms in Hebei Province

doi:10.7668/hbnxb.201751582

Abstract

Abstract: This study aimed to screen the watermelon varieties and germplasms resistant to fusarium wilt, anthracnose and powdery mildew in Hebei Province, and analyze the related resistance genes, which could provide a reference for breeding disease-resistant varieties. The modified CTAB method was used to extract the DNA from watermelon bud, and the DNA concentration was determined by Ultramicro spectrophotometer. After the DNA was diluted to 2-10 ng/μL, they were detected by KASP. The molecular markers of resistance to fusarium wilt, anthracnose and powdery mildew of watermelon were developed by XU Yong's team. The resistant genes related to fusarium wilt, anthracnose and powdery mildew of watermelon were identified by high-throughput KASP markers. Totally 130 watermelon materials were tested, including varieties or advantaging combinations (Xingyan No.7, Meijia, Meisheng, Guifei, 17-11 and so on) that have been approved or will be approved in Hebei Province in recent years, and some excellent germplasms (Huazaolü,JB-1,JB-3,901xin and so on). 3Kang302 was used as the disease-resistant control and GBZG as the susceptible control. The result showed that 33 materials contained fusarium wilt resistance gene Fon-1, 19 contained anthracnose resistance gene AR1, 7 contained powdery mildew resistance gene PM1, 5 contained Fon-1 and AR1, 1 contained AR1 and PM1, and 1 contained all three resistance genes(Fon-1, AR1 and PM1). According to the result of KASP, the materials were clustered, and divided into 4 categories:12 materials resistant to powdery mildew without detection signal or with heterozygous resistance, 67 resistant to powdery mildew or susceptible to at least two diseases, 38 resistant to fusarium wilt or anthracnose, and 13 resistant to fusarium wilt or anthracnose or powdery mildew without detection signal or with heterozygous resistance.

Key words: Watermelon, Resistance gene, KASP detection

CLC Number:

S642.9

ZHANG Jingjing, ZHANG Haiying, PAN Xiuqing, XU Yong, REN Yi, GAO Xiurui, LI Bing, SHI Yufan, DANG Jige, YANG Mingzhu, WU Yanrong. KASP Assays of Disease Resistance Genes from 130 Watermelon Varieties and Germplasms in Hebei Province[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(2): 110-116. doi: 10.7668/hbnxb.201751582.

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