Dataset for: Parental value for tuber yield in potato clones with resistance to late blight and heat tolerance, under high temperatures conditions (SET 2)

The International Potato Center (CIP) has developed a population named LBHT, obtaining new clones that are more tolerant to high temperatures, resistant to late blight, virus and early maturity, and they are available for use by developing countries for the selection of varieties or as parents in their breeding programs. The potato is highly heterozygozus crop, the most important economical characters are governed by additive and non-aditive genes. Therefore, the parental value of a clone cannot be assessed from phenotypic value alone. It is very important to know its combining ability as an indicator of parental value. Combining ability analysis is a method very useful for choosing better parents, and in the formulation of a crossing plan for a plant breeding program. During 2012 and 2013, 6 advanced clones of LBHT population, were crossed using line x tester mating design, where the clones were used as female parents (lines), and as male parents (testers). The varieties, Katahdin (Solanum tuberosum spp tuberosum), Huagalina (Solanum tuberosum spp andigena) and clone CIP302533.31 were used in this experiment. Furthermore, during 2013 - 2014, 18 progenies were evaluated under field conditions in three locations in Peru: La Molina, San Ramon and Majes. All experiments were conducted using statistical design of randomized complete block with three replications of 40 plants per plot. At harvest, the number and weight of marketable and non- marketable tubers were recorded. Then, the average weight of tubers, weight of marketable and total tubers per hectare in tons were calculated. The analysis of variance for line by tester mating desing and determination of the effects of general combining ability (GCA) for these characters were performed using statistical software, SAS V. 9.4 (SAS Institute Inc., Cary, NC, USA).

国际马铃薯中心（International Potato Center, CIP）培育了名为LBHT的群体，获得了耐热性更强、抗晚疫病、抗病毒且早熟的新无性系，该资源可供发展中国家用于品种选育或作为育种项目的亲本使用。马铃薯是高度杂合的作物，其核心经济性状由加性基因与非加性基因共同调控。因此，仅通过表型值无法准确评估无性系的亲本价值，以配合力（combining ability）作为亲本价值的评价指标具有重要意义。配合力分析是筛选优良亲本、制定植物育种杂交计划的有效手段。2012至2013年间，研究人员采用测交系（line × tester）交配设计，对LBHT群体的6个优良无性系进行杂交，将这些无性系分别作为母本系（lines）与父本测验种（testers）。本试验所用材料包括品种Katahdin（Solanum tuberosum spp. tuberosum）、Huagalina（Solanum tuberosum spp. andigena）以及无性系CIP302533.31。2013至2014年，研究人员在秘鲁的拉莫利纳（La Molina）、圣拉蒙（San Ramon）和马赫斯（Majes）三个试验点，对18个杂交后代进行田间性状评价。所有试验均采用完全随机区组设计，每个小区种植40株，设置3次重复。收获期记录商品块茎与非商品块茎的数量及重量，并计算块茎平均重量、商品块茎重量及单位公顷总块茎重量（单位：吨）。随后采用统计软件SAS V.9.4（美国北卡罗来纳州卡里市SAS研究所公司），对测交交配设计进行方差分析，并估算上述性状的一般配合力（general combining ability, GCA）效应。