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一、主要特征、特性“内薯五号”(原代号为7426—8)属小叶型,顶小叶和侧小叶都较小,叶色淡绿,株型直立,株高70厘米左右。茎技较多,枝叶繁茂。花冠白粉色,自交不结实。薯块长扁形。黄皮黄肉。脐部有根毛,单株产量1.5公斤左右。生长势强,出苗快而整齐。播种一成熟130天左右(出苗—成熟108天)属中晚熟品种。缺点是结薯较分散,薯块膨大期长,对水份敏感,严重受旱或土壤板结而影响薯形和整齐度。严重时甚至形成脐部脱水萎缩。二、主要优良性状 1.产量高而稳定“内薯五号”从选育到试验示范,几年来一直表现产量高而稳,经济性状好,1977年品系鉴定折合亩产6130斤,比对照种“沙杂15号”增产182.4％,达到极显著,在82份材料中居
First, the main features, characteristics “Potato No. 5” (formerly code-named 7426-8) is a leaflet type, the top leaflets and lateral leaflets are smaller, light green leaves, plant type upright, about 70 cm tall. More stem technology, lush foliage. Corolla white pink, self-fertility is not strong. Potato block long flat. Yellow yellow meat. Umbilical root hair, yield about 1.5 kg per plant. Strong growth, fast and neat emergence. A mature about 130 days of sowing (emergence - mature 108 days) is a middle-late maturing varieties. The disadvantage is that the potato tuber more dispersed, tuber swelling period, sensitive to water, severe drought or soil compaction and affect the potato shape and uniformity. Even severe umbilical dehydration and atrophy. Second, the main fine traits 1. High yield and stability, “Potato No. 5” from breeding to test demonstration, the past few years has been the performance of high and stable, good economic traits, identification of strains equivalent to 4,730 pounds per mu in 1977, than the control species “Sha Za 15” increased production 182.4%, reaching a very significant, in 82 materials in the home