Genotype × Environment Interactions for Specific Gravity in Diploid Potatoes
Genotype × Environment Interactions for Specific Gravity in Diploid Potatoes
复制标题
二倍体马铃薯比重的基因型×环境相互作用
DOI：
10.2135/cropsci1995.0011183x003500040007x
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
M. Kang
中科院分区：
文献类型：
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作者：
K. Haynes;D. Wilson;M. Kang
在无性系繁殖的作物中，如马铃薯(Solanum tuberosum L.)，估计遗传方差占总表型方差(广义遗传力)的比例是可取的。块茎比重因其在加工工业中的重要性而得到了广泛的研究。早先对龙葵×狭叶茄子(Phu-STN)二倍体杂交群体比重的狭义遗传力的估计是中等的。这项研究的目的是为未来的种群改良努力识别稳定的、高比重的无性系，并基于克隆平均值估计该Phu-STN种群的广义遗传力。从1990年到1992年，在梅州普雷斯克岛重复种植了72个二倍体杂交种Phu-STN无性系，并对其比重进行了评估。无性系间差异显著。还存在显著的复制(年)效应和无性系x年交互作用。根据比重的方差分析，基于无性系均值的广义遗传力估计为0.66，95%的可信区间为0.50~0.78。对每个无性系计算的稳定性-方差统计量用于识别稳定的高比重无性系。3年的平均比重与稳定性-方差统计量之间没有相关性，表明选择高比重的无性系不应该导致对比重不太稳定的无性系。
In a clonally propagated crop, such as potato (Solanum tuberosum L.), an estimate of genetic variance as a proportion of the total phenotypic variance (broad-sense heritability) is desirable. Because of its importance to the processing industry, tuber specific gravity has been widely studied. Earlier estimates of narrow-sense heritability for specific gravity in a diploid hybrid population of Solanum phureja x Solanum stenotomum (PHU-STN) were moderate. The purpose of this study was to identity stable, high specific gravity clones for future population improvement efforts and to estimate broad-sense heritability based on clonal means in this PHU-STN population. From 1990 to 1992, 72 diploid hybrid PHU-STN clones were grown in replicated field plots in Presque Isle, ME, and evaluated for specific gravity. There were significant differences among clones. There was also a significant replication (year) effect and clone x year interaction. From the analysis of variance on specific gravity, broad-sense heritability based on clonal means was estimated as 0.66, with a 95% confidence interval of 0.50 to 0.78. Stability-variance statistics calculated for each clone were used to identify stable high specific gravity clones. There was no correlation between average specific gravity during 3 yr and the stability-variance statistic, indicating that selecting for high specific gravity should not result in clones that are less stable for specific gravity.