High Yield and Good Quality Germplasm Selection of Potato in Yunnan Winter Planting and Analysis of Nutrient Utilization Characteristics

PurposeTo screen potato germplasm with high yield, good quality and nutrient utilization efficiency, providing variety for a green and sustainable development of Yunnan winter potato cultivation.

MethodsLishu 6, a major winter cultivar in Yunnan, was used as control (CK). The change levels of yield per plant, yield components, tuber dry matter content, starch content, crude protein content, reducing sugar content and agronomic efficiency of 23 high-generation lines cultivated by Tuber and Root Crop Institute of Yunnan Agricultural University were analysed independently under fertilization and no fertilization treatment.

ResultsThe yield per plant of 3S-120, D97, 14009-23, and 14022 under fertilization and no fertilization was higher than CK. D97, 3S-120, 14022 and 14009-23 with the high levels of nutrient agronomic efficiency, among them, the agronomic efficiency of D97 and 3S-120 nutrient was significantly higher than CK (P<0.05) . Both in fertilization and no fertilization treatment, the levels of starch contents and crude protein contents of 3S-120 and 14022 were higher than CK, but the content of reducing sugar was less than CK. In terms of tuber quality, D97 and 14009-23 were similar to CK.

ConclusionLines D97, 3S-120, 14009-23 and 14022 have excellent comprehensive performance in yield, quality and nutrient utilization efficiency, and present good cultivation potential for further promotion, they can be used as a candidate cultivar of Yunnan winter cultivation.