CUSTOMER-RELATED QUALITY OF PERSPECTIVE POTATO HYBRIDS (SOLANUM TUBEROSUM L.)

Purpose. Based on the study of consumer qualities of perspective potato hybrids (Solanum tuberosum L.) the ones with a high degree of differentiation depending on the biochemical composition of tubers and culinary-consumer type were identified.

Methods. Field (phenology); laboratory (biochemical, technological); mathematical and statistical (linear correlation, regression).

Results. Consumer qualities and patterns of their formation under the influence of the biochemical composition of tubers were studied. Excellent taste was determined in mid-early (‘203.703-3’, ‘205.781-9’), mid-season (‘205.786-72’, ‘205. 798-15’) hybrids. High cooking quality of the tubers was detected in early-season hybrids (‘99.523-15’, ‘205.791-3’, ‘205.785-25’, ‘205.792-205’). Soft crispy texture was detected in mid-early (‘205.776-25’, ‘99.546-3’) and mid-season (‘205.782-24’, ‘205.786-72’, ‘205.798-43’) hybrids. The mid-early hybrid '205.780-8' contained high levels of starch. In terms of resistance to browning, three early-season (‘99.517-39’, ‘203.703-2’, ‘205.785-25’) and two mid-season hybrids (‘205.781-9’, ‘205.788-3’) were selected.  It is proved, that the taste development depended on the starch content (r=0,657), proportion of starch/protein (r=0,470) and sugars accumulation (r= -450). The positive dependence of the cooking quality of the tubers on their starchiness (r=0,945), proportion of starch and protein (r=0,900) was detected. The influence of proportion of starch/protein over the texture of the tubers (r=0,877) and starch content (r=0,868) was established. Mealiness depended on sugars (r= -0,494) and starch content (r=0,474), resistance to browning – on tyrosine content in protein (r=-0,873) and free tyrosine content (r= - 0,824). In terms of culinary and consumer type of food (table) potatoes, eight hybrids were rated as type B, five and five hybrids belonged to types A and C respectively, and three hybrids belonged to type D.

Conclusions. The selected, as for the high level of culinary quality indicators, hybrids can be recommended as valuable output material for practical plant breeding. Determination of biological interrelation of potato culinary quality indicators and biochemical composition of their tubers allowed to develop mathematical simulations to predict taste and texture, and it practically relieved from boiling and subjective evaluation by organoleptic method of tasting results. Systematization of culinary and consumer type food (table) potatoes can be a subject matter in the course of state variety testing.