Victorio R G, Moreno U, Black C C
Departmento de Biologia, Universidad Nacional Agraria, La Molina, Lima, Peru.
Plant Physiol. 1986 Sep;82(1):103-8. doi: 10.1104/pp.82.1.103.
Ten Solanum potato genotypes, including four primitive species and six hybrids, were grown to maturity near 230 and 3273 meters in elevation at two sites, Coast and Sierra, in Peru. Growth data, with emphasis upon tubers and leaves, were collected periodically to analyze the plant components which differed in these contrasting environments. Nine of the Solanum species/cultivars effectively partitioned dry matter into tubers with values reaching 73 to 85% of the total plant at mature harvest in the Sierra but dropping to 33 to 75% on the Coast. These harvest index differences were, however, accompanied by no consistent changes in total leaf area, specific leaf area, nor number of tuber initiated. Consistent differences did occur in having shorter plants in the Sierra and an increased tuber dry matter percentage, 20 to 28%, in the Sierra compared to 14 to 21% on the Coast. Linear relationships exist between plant tuber harvest index versus tuber yield and versus total plant dry matter on both the Coast and in the Sierra.
十个茄属马铃薯基因型，包括四个原始物种和六个杂交种，在秘鲁海岸和塞拉的两个地点海拔约230米和3273米处生长至成熟。定期收集生长数据，重点是块茎和叶片，以分析在这些截然不同的环境中存在差异的植物组成部分。九个茄属物种/品种有效地将干物质分配到块茎中，在塞拉成熟收获时，块茎干物质占植株总量的比例达到73%至85%，但在海岸地区则降至33%至75%。然而，这些收获指数的差异并没有伴随着总叶面积、比叶面积或起始块茎数量的一致变化。在塞拉地区，植株确实一致地更矮，并且与海岸地区14%至21%相比，塞拉地区块茎干物质百分比增加到20%至28%。在海岸地区和塞拉地区，植株块茎收获指数与块茎产量以及与植株总干物质之间均存在线性关系。
