The Present Status of Variety Selection in Potato
|Keywords:||抗病篩選;病毒抗性;馬鈴薯;根莖作物生產改進及加工利用研討會專刊;Potato;Selection;virus resistance;Proceeding of A Symposium on Root Crop Yield Improvement, Processing and Utilization in Taiwan||Issue Date:||Jun-1994||Publisher:||台中：農業試驗所嘉義分所||Start page/Pages:||29-37||Source:||根莖作物生產改進及加工利用研討會專刊:||Abstract:||
This paper reports the variety selection tasks in potato conducted at Taiwan Agricultural Research Institute (TARI) during the past decade. Breeding materials were categorized into two groups according to their original source and results obtained were separately described. The first group included 921 clones from the Asian Vegetable Research and Development Center, originally for trials of heat tolerance. The amount of clones decreased as the number of propagation cycles increased due to virus contarmination. Some clones performed well in terms of good tuber yield and insignificant virus infection. Selected clones underwent a series of variety and regional trials. With the confirmation of its resistance to PVY through serological tests, a clone with oval tubers of yellow skin and yellow flesh was registered as Tainung No. 1 on Mar 2, 1993. This variety is good for table use. The second group, introduced from the International Potato Center, was further divided into two subgroups. The first subgroup included 50 tuber families segregating for PVY resistance. After inoculating PVY-m at the time of first planting and additional five consecutive crops of screening, 53% of the tuber families were selected for PVY resistance by ELISA test. Only 3% of the selected families showed viral symptoms in later field trials. The second subgroup included 52 tuber families with multiple resistances to PVX, PVY, bacterial wilt, late blight, early blight, and potato leaf-roll virus either alone or in combination. Fifty-six percent of the tuber families were selected for their negative reaction to PVY after a series of field screening and ELISA test. However, 15 % of the selected families showed viral symptoms in the field. Clones with good traits and high tuber specific gravity were available in both subgroups. Based on the information secured, variety for both table-use and processing purposes could be selected in the near future with continuous efforts.
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