Journal ArticleDOI
Evaluation and breeding of tedera for Mediterranean climates in southern Australia
Daniel Real,C. M. Oldham,Matthew N. Nelson,Janine Croser,Marie-Claire Castello,Arūnas P. Verbyla,Arūnas P. Verbyla,A. Pradhan,A.J. Van Burgel,P. Méndez,Enrique Correal,Natasha Teakle,Natasha Teakle,Clinton Revell,Clinton Revell,Mike Ewing,Mike Ewing +16 more
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Economic modelling strongly suggests that giving livestock access to green tedera in summer and autumn will dramatically increase farm profit by reducing supplementary feeding, and selected cultivars from the crossing and selfing program will deliver cultivars of three ideotypes.Abstract:
Tedera (Bituminaria bituminosa C.H. Stirton var. albomarginata and var. crassiuscula) has been identified as one of the most productive and drought-tolerant species of herbaceous perennial legumes based on 6 years of field evaluation in Western Australia in areas with Mediterranean climate and annual rainfall ranging from 200 to 600 mm. Importantly, tedera demonstrated broad adaptation to diverse soils, and some accessions have shown moderate levels of tolerance to waterlogging and salinity. Tedera exhibits minimal leaf shedding during summer and autumn. Economic modelling strongly suggests that giving livestock access to green tedera in summer and autumn will dramatically increase farm profit by reducing supplementary feeding. The breeding program (2006–12) evaluated the available genetic diversity of tedera for its field performance in seven nurseries with 6498 spaced plants in total covering a wide variation in rainfall, soils and seasons. Best overall plants were selected using a multivariate selection index generated with best linear unbiased predictors (BLUPs) of dry matter cuts and leaf retention traits. The breeding program also evaluated tedera for grazing tolerance, grazing preference by livestock, waterlogging tolerance, seed production, cold tolerance, disease susceptibility and presence of secondary compounds. Tedera is a diploid, self-pollinated species. Therefore, 28 elite parents were hand-crossed in several combinations to combine outstanding attributes of parents; F1 hybrids were confirmed with the aid of highly polymorphic, simple sequence repeat markers. The F1s were progressed to F4s by single-seed descent breeding. Elite parent plants were selfed for two generations to be progressed in the breeding program without hybridisation. Over time, selections from the crossing and selfing program will deliver cultivars of three ideotypes: (i) drought-tolerant, (ii) cold- and drought-tolerant, (iii) waterlogging- and drought-tolerant.read more
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Journal ArticleDOI
Unlocking the potential of orphan legumes
TL;DR: Orphan legumes are better adapted than the major legume crops to extreme soil and climatic conditions, with high tolerance to abiotic environmental stresses such as drought, and are a likely source of important traits for introduction into major crops to aid in combating the stresses associated with global climate change.
Posted Content
A farm level assessment of a novel drought tolerant forage:Tedera (Bituminaria bituminosa C.H.Stirt var. albomarginata)
TL;DR: The results indicate that tedera offers the potential to increase farm profits by up to 26% and be grown on ~28% of a low rainfall mixed enterprise farm.
Journal ArticleDOI
Tedera proves its value as a summer and autumn feed for sheep in Mediterranean-like climates
TL;DR: Three sheep grazing experiments clearly demonstrate that tedera can be used to reduce or eliminate expensive hand feeding during summer and autumn using the simplest and least expensive grazing management; continuous grazing.
Journal ArticleDOI
Productivity and nutritional value of 20 species of perennial legumes in a low‐rainfall Mediterranean‐type environment in southern Australia
Hayley C. Norman,Alan Humphries,Elizabeth Hulm,Paul Young,S. Hughes,Trevor Rowe,David M. Peck,Phil Vercoe +7 more
Journal ArticleDOI
Minerals in pastures—are we meeting the needs of livestock?
TL;DR: The results indicate that mineral supply from pastures is not sufficient to support high levels of production for at least part of the year and that designing grazing system to incorporate the complementary benefits of grasses, legumes, crop forage and shrubs may improve the mineral status of grazing ruminants.
References
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Book
Breeding field crops
TL;DR: The main objectives of the book include: a review of the essential features of plant reproduction and genetic principles; an evaluation of established and new plant-breeding techniques; and achieving success in variety development.
Journal ArticleDOI
Nuclear DNA content and genome size of trout and human.
TL;DR: Because trout and human nuclei are often used as internal reference standards to determine genome size in animals and plants, the results published by Thomas et al. (1) need correction to avoid serious mistakes.
Journal ArticleDOI
Accounting for natural and extraneous variation in the analysis of field experiments.
TL;DR: The authors identify three major components of spatial variation in plot errors from field experiments and extend the two-dimensional spatial procedures of Cullis and Gleeson (1991) to account for them.
Journal ArticleDOI
Formation of Aerenchyma and the Processes of Plant Ventilation in Relation to Soil Flooding and Submergence
TL;DR: The review highlights recent work on the processes that sense oxygen deficiency and ethylene signals, subsequent transduction processes which initiate cell death, and steps in protoplast and wall degeneration that create the intercellular voids.
Journal ArticleDOI
The analysis of crop cultivar breeding and evaluation trials: an overview of current mixed model approaches
TL;DR: The most common mixed model approaches for series of variety trials are mixed model versions of the methods summarized by Kempton (1984) as mentioned in this paper, and a general formulation that encompasses all of these methods is described, then individual methods are considered in detail.