Selection of potato clones for tuber yield, vine maturity and frying quality

ABSTRACT Development of Brazilian potato cultivars adapted to different growing conditions, production systems and regions of the country is very important to increase the competitiveness of the national potato chain. In this sense, the objective of this work was to verify the performance of advanced potato clones for tuber yield traits, vine maturity and frying quality. An experiment was carried out in Pelotas-RS in spring, 2014. A set of nine advanced potato clones and two control cultivars were evaluated using a randomized complete block design with four replicates. Plots consisted of single rows of 20 plants spaced at 0.80 m between rows and 0.30 m between plants. The data of each trait were submitted to the deviance analysis, estimated the genetic values and selected the best genotypes using selection indices of the sum of ranks and the lowest distance from the ideotype. Clones F131-08-26 and F183-08-01, and the check ‘Asterix’ were distinguished for yield of marketable tubers. F183-08-01 and the control stood out for specific gravity and average tuber weight. Clone F161-07-02 ranked among the best for specific gravity, frying color and vine maturity. F97-07-04 and F183-08-01 and the check ‘Asterix’ were the best according to the selection indices, however, would result in losses in the frying color and vine maturity traits.

摘要：培育适配巴西不同种植条件、生产体系及国内各产区的马铃薯品种，对提升本国马铃薯产业链的竞争力至关重要。本研究旨在评估高级马铃薯无性系在块茎产量性状、藤蔓成熟度与油炸品质方面的表现。试验于2014年春季在南里奥格兰德州佩洛塔斯（Pelotas-RS）开展，采用完全随机区组设计，设置4次重复，共纳入9个高级马铃薯无性系与2个对照品种进行评估。试验小区采用单排种植模式，每排20株，株距0.30米，行距0.80米。对各性状数据开展偏差分析，估算遗传值，并分别采用秩和选择指数与理想型最小距离选择指数筛选最优基因型。结果表明，无性系F131-08-26、F183-08-01及对照品种‘Asterix’在商品块茎产量上表现突出；F183-08-01与对照品种在块茎比重及平均块茎重量性状上表现优异；无性系F161-07-02在块茎比重、油炸色泽与藤蔓成熟度方面位列优良基因型行列。基于选择指数筛选得到的最优基因型为F97-07-04、F183-08-01与对照‘Asterix’，但该筛选结果在油炸色泽与藤蔓成熟度性状上存在短板。