Improving Potato Seed Tuber Quality and Producers' Livelihoods in Hararghe, Eastern Ethiopia

2005 ◽  
Vol 7 (3) ◽  
pp. 31-56 ◽  
Author(s):  
Eshetu Mulatu ◽  
Osman E. Ibrahim ◽  
Etenesh Bekele
Keyword(s):  
Seed Tuber ◽  
Tuber Quality ◽  
Potato Seed ◽  
Eastern Ethiopia ◽  
Potato Seed Tuber

scholarly journals Co-occurrence of latent Dickeya and Pectobacterium species in potato seed tuber samples from northern Finland

2021 ◽  
Vol 30 (1) ◽  
Author(s):  
Yeshitila Degefu
Keyword(s):  
Seed Tuber ◽  
Single Species ◽  
Soft Rot ◽  
Potato Seed ◽  
Pcr Assay ◽  
Diagnostic Pcr ◽  
Pectobacterium Atrosepticum ◽  
Dickeya Solani ◽  
Different Strains ◽  
Potato Seed Tuber

Recent methodological developments have uncovered the etiological diversity of the potato blackleg and soft rot Pectobacteriaceae. At least five species in the genera Dickeya and Pectobacterium have been confirmed to cause blackleg on potatoes in Finland. The bacteria are seed borne and remain latent in the tuber until conditions favourable for growth, multiplication and infection prevail. Tubers could be infected by one or more of these species. This short communication is based on the results of molecular detection data collected for more than 14 years from potato seed lots produced in Finland. Diagnostic PCR assay specific to Dickeya solani, Pectobacterium atrosepticum, Pectobacterium carotovorum, P. brasiliense and P. parmentieri revealed that potatoes are infected by one or more of these species; it also revealed that single species infection is more common than multiple colonization. An event of simultaneous occurrences of different strains from the Pectobacterium species appears to be more frequent than that observed between Dickeya and Pectobacterium species. The absence of co-occurrence of Dickeya solani and Pectobacterium atrosepticum is intriguing.

Effect of altering the physiological age of potato seed-tubers in the fall on subsequent production in a short-season environment

1992 ◽  
Vol 72 (1) ◽  
pp. 275-287 ◽  
Author(s):  
N. Richard Knowles ◽  
Gabor I. Botar
Keyword(s):  
Plant Growth ◽  
Harvest Index ◽  
Seed Tuber ◽  
Growing Season ◽  
Russet Burbank ◽  
Physiological Age ◽  
Quadratic Model ◽  
Tuber Quality ◽  
Potato Seed ◽  
Seed Tubers

The efficacy of utilizing "controlled seed-tuber aging" as a technique to enhance yield and improve tuber quality in areas with relatively short growing seasons was investigated in a 3-yr study. Prior to planting in the field, five physiological ages of Russet Burbank, Carlton, Norchip and Superior seed-tubers were produced by varying the heat-unit accumulation over a 200-d storage interval. Total yield increases of up to 90% and substantial improvements in tuber grade were achieved by planting aged (600–900 degree-day (dd)) seed-tubers. Plant growth from aged Russet Burbank seed-tubers was modelled to identify the mechanisms by which yield and quality were altered. Growth analysis demonstrated that the age-induced yield increases were due to faster emergence, faster leaf-area establishment, and tuberization earlier in the growing season compared with that from younger seed-tubers. The annual life cycle was thus accelerated, allowing plants from older seed-tubers to utilize the short (120-d) growing season more efficiently than those from younger seed-tubers. This was reflected in a higher harvest index: plants from 739 dd seed-tubers partitioned 63% of their total fresh weight into tubers compared with 48% for those from 66 dd seed-tubers (based on the quadratic model describing the relationship between seed-tuber age and and harvest index at 121 d after planting). The technique appears to be very promising for enhancing yield and/or promoting ’earliness’ of potatoes in regions with short growing seasons.Key words: Solanum tuberosum, seed-tuber age, plant growth, yield

Effect of various phosphorus and calcium concentrations on potato seed tuber production

2018 ◽  
Vol 41 (14) ◽  
pp. 1765-1777 ◽  
Author(s):  
Ashkan Abbasian ◽  
Ali Ahmadi ◽  
Ali-Reza Abbasi ◽  
Babak Darvishi
Keyword(s):  
Seed Tuber ◽  
Potato Seed ◽  
Tuber Production ◽  
Potato Seed Tuber

Impact of Different US Genotypes of Phytophthora infestans on Potato Seed Tuber Rot and Plant Emergence in a Range of Cultivars and Advanced Breeding Lines

2009 ◽  
Vol 52 (2) ◽  
pp. 121-140 ◽  
Author(s):  
William W. Kirk ◽  
Firas Abu-El Samen ◽  
Pavani Tumbalam ◽  
Phillip Wharton ◽  
David Douches ◽  
...  
Keyword(s):  
Phytophthora Infestans ◽  
Seed Tuber ◽  
Potato Seed ◽  
Breeding Lines ◽  
Plant Emergence ◽  
Potato Seed Tuber ◽  
Tuber Rot
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