Agronomic evaluation of Leucaena. Part 1. Adaptation to environmental challenges in multi-environment trials

Mullen, B. F., Shelton, H. M., Gutteridge, R. C. and Basford, K. E. (2003) Agronomic evaluation of Leucaena. Part 1. Adaptation to environmental challenges in multi-environment trials. Agroforestry Systems, 58 2: 77-92.


Author Mullen, B. F.
Shelton, H. M.
Gutteridge, R. C.
Basford, K. E.
Title Agronomic evaluation of Leucaena. Part 1. Adaptation to environmental challenges in multi-environment trials
Journal name Agroforestry Systems   Check publisher's open access policy
ISSN 0167-4366
Publication date 2003-03
Sub-type Article (original research)
DOI 10.1023/A:1026068215337
Volume 58
Issue 2
Start page 77
End page 92
Total pages 16
Place of publication Netherlands
Publisher Springer
Language eng
Subject 300203 Plant Improvement (Selection, Breeding and Genetic Engineering)
0705 Forestry Sciences
Abstract A multi-environment trial was conducted to evaluate the performance of high yielding accessions from most taxa of Leucaena, for broad and specific adaptation to growth-limiting environments, and to develop an understanding of environmental parameters limiting growth of this important multipurpose tropical tree-legume genus. Eighteen sites were selected to include environments known to constrain the growth of L. leucocephala. Accessions were planted in replicated line plots, with 10 trees/plot, spaced 50 cm apart, and with rows spaced 3 m apart. Environmental parameters measured were maximum and minimum temperatures, rainfall and psyllid pressure. Soil fertility and acidity indices were derived from soil analyses. A KX2 F1 hybrid accession proved broadly adapted with high yield rankings in all environments, and with yield advantage greatest at low temperature and high psyllid pressure sites. Specific adaptation to low temperature environments was identified in L. trichandra OFI53/88, and to a lesser extent in L. pallida CQ3439. No accessions were specifically adapted to acid-infertile soils. Highest dry matter production was achieved in fertile, hot, humid, low psyllid environments. Very low growth rates were achieved in acid-infertile and low temperature environments. Yield was strongly reduced by mean monthly minimum temperatures of <22 &DEG;C, mean monthly maximum temperatures of <29 degreesC, psyllid pressure of >2.5 (1-9 scale of increasing pressure based on damage to young leaves), acidity index of <6 (1-7 scale of decreasing acidity based on soil pH and Al saturation) and fertility index of <9 (1-12 scale of increasing fertility based on critical soil nutrient levels).
Keyword Agronomy
Forestry
acid-soils
G x E interaction
KX2 hybrid
low temperature
tree legume
Southeast-queensland
Psyllid Resistance
Nutritive-value
Leucocephala
Performance
Diversifolia
Quality
Sites
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Agriculture and Food Sciences
 
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