鲜食型紫甘薯新品种桂薯18号的选育及丰产稳产性评价OA

A new fresh-eating purple sweet potato cultivar,Guishu No.18,was developed via open pollination using Guiziweishu No.1 as the female parent,aiming to breed varieties with high yield,good eating quality,and high an-thocyanin content.Based on the data from multi-location trials conducted in Guangxi and the southern sweet potato region during 2021-2022,its yield performance,stability,and adaptability were evaluated by combined analysis of variance and GGE biplot analysis,together with quality traits and disease resistance.The two-year average fresh storage root yield of Guishu No.18 was 27.99 t/hm2 in the Guangxi multi-location trials,which was 9.69%higher than that of the control cultivar Guishu No.2.In the multi-location trials of the southern sweet potato region,the two-year average fresh storage root yield was 34.40 t/hm2,representing a 37.38%increase over Ningzishu No.1,and ranking among the top tested cultivars.Combined analysis of variance indicated that year,location,genotype,and the interactions had significant effects on fresh storage root yield.GGE biplot analysis showed that Guishu No.18 had a relatively high mean yield,good stability,and wide ecological adaptability.The anthocyanin content of the storage roots was 456.10 mg/kg,with relatively high starch content and good fresh-eating quality.Disease resistance evalua-tion indicated that this cultivar was moderately resistant to type II sweet potato wilt.In conclusion,Guishu No.18 is a fresh-eating purple sweet potato cultivar with desirable comprehensive traits and good potential for demonstration and extension.