Nitrogen Use Efficiency Characteristics of Andigena and Diploid Potato Selections

Considerable effort has been made to develop management practices to reduce environmental losses of nitrogen (N) from potato production systems. Increasing the efficiency of N utilization by the potato crop is one approach to reducing environmental losses of N. This study evaluated the variation in...

Full description

Saved in:
Bibliographic Details
Published in:American journal of potato research 2008-06, Vol.85 (3), p.210-218
Main Authors: Zebarth, B.J, Tarn, T.R, de Jong, H, Murphy, A
Format: Article
Language:English
Subjects:
Agriculture
Agronomy. Soil science and plant productions
Biological and medical sciences
Biomedical and Life Sciences
crop yield
diploidy
dry matter accumulation
fertilizer rates
Fundamental and applied biological sciences. Psychology
genetic variation
germplasm
germplasm screening
Life Sciences
nitrogen
nitrogen fertilizers
nutrient uptake
nutrient use efficiency
plant adaptation
Plant Breeding/Biotechnology
plant genetic resources
Plant Genetics and Genomics
plant nutrition
Plant Pathology
Plant Sciences
potatoes
selection criteria
Solanum tuberosum
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Considerable effort has been made to develop management practices to reduce environmental losses of nitrogen (N) from potato production systems. Increasing the efficiency of N utilization by the potato crop is one approach to reducing environmental losses of N. This study evaluated the variation in N use efficiency characteristics of a series of superior Andigena and diploid potato selections from two populations of potato germplasm selected for adaptation to long days within the potato breeding program of Agriculture and Agri-Food Canada. Seven Andigena selections (six in 2001), seven diploid selections and two commercial cultivars (Kennebec, Butte) were grown at two fertilizer N rates (0 or 100 kg N ha −1 ) in 2000 and 2001. Plant dry matter and N accumulation were measured on one date chosen to reflect the onset of senescence. Drought conditions in 2001 reduced tuber yield and crop response to N fertilization compared with 2000. Significant variation in N use efficiency characteristics were measured among selections in both years. Variation in N utilization efficiency (plant dry matter accumulation/plant N accumulation) among selections was consistent across the 2 years of this study, despite dramatically different environmental conditions. With the exception of selection 12581-06, N use efficiency parameters for the commercial cultivars was generally similar to or superior to that for the Andigena and diploid selections. Nitrogen use efficiency (plant dry matter accumulation/crop N supply) was generally increased for selections with less visible evidence of senescence at the time of plant sampling, and for selections that partitioned a greater proportion of plant N to vines. The significant variation in N use efficiency characteristics, and the consistent pattern of these N use efficiency characteristics among selections across contrasting environmental conditions, suggest that it is practical to screen adapted potato germplasm with respect to N use efficiency characteristics.
ISSN:1099-209X
1874-9380
DOI:10.1007/s12230-008-9014-6