Lotus uliginosus (greater lotus) breeding line LUX97: a high seed producing, low condensed tannin population

A Lotus uliginosus polycross population (LUX97) was developed from high seed producing Portuguese accessions and locally adapted New Zealand germplasms. Two cycles of selection for early flowering and low condensed tannin content were successful in producing a population with lower condensed tannin content than the Portuguese parents, while maintaining high seed production potential. Seed of this population will be stored at the CSIRO Plant Industry, Canberra.

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Problems of amenity grass seed production in New Zealand

NZGA: Research and Practice Series ◽

10.33584/rps.1.1979.3291 ◽

1980 ◽

Vol 1 ◽

pp. 26-30

Author(s):

L. Corkill ◽

W. Rumball

Keyword(s):

New Zealand ◽

The Netherlands ◽

Seed Production ◽

Direct Selection ◽

Usual Practice ◽

Grass Seed ◽

Breeding Management ◽

Selection For ◽

Seed Yields ◽

Selection Of

The problems of seed production of amenity grasses in New Zealand are considered from two aspects - (a) increasing seed potential by breeding; (b) achieving that potential by good management as practised in the Netherlands, (a) In terms of breeding, the strategies to increase seed yield depended to some degree on the species concerned. With browntop it was necessary to discard about two-thirds of the most promising genotypes because of poor heading, but the remaining genotypes flowered freely and in unison, and gave good seed yields. With fescue even the best original plants were sparsely heading, so direct selection for prolificacy has been needed. This was also carried out for perennial ryegrass, as well as selection of early-heading genotypes to avoid infection by stem rust. (b) It is suggested that areas for seed of amenity grasses in New Zealand should be used for seed production only rather than for both forage and seed as is the usual practice. Techniques used in the Netherlands could serve as guidelines to procedures. The implications of low seeding rates, good weed control, high fertilizer applications and minimum cutting or grazing in promoting strong individual plants capable of high seed yields are discussed. Keywords: Amenity grass, seed production, New Zealand, breeding, management, Netherlands, Agrostis tenuis, Festuca rubra, Lolium perenne

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Seed Production Potential of Flowering Types in Birdsfoot Trefoil 1

Crop Science ◽

10.2135/cropsci1964.0011183x000400040034x ◽

1964 ◽

Vol 4 (4) ◽

pp. 436-437 ◽

Cited By ~ 2

Author(s):

R. I. Buzzell ◽

C. P. Wilsie

Keyword(s):

Seed Production ◽

Birdsfoot Trefoil ◽

Production Potential

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Short rotation coppice tree species selection for woody biomass production in New Zealand

Fuel and Energy Abstracts ◽

10.1016/s0140-6701(02)85259-6 ◽

2002 ◽

Vol 43 (2) ◽

pp. 120-121

Keyword(s):

New Zealand ◽

Biomass Production ◽

Tree Species ◽

Woody Biomass ◽

Short Rotation Coppice ◽

Species Selection ◽

Short Rotation ◽

Selection For

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Should immunocontraception be used for wildlife population management?

Australian Mammalogy ◽

10.1071/am04061 ◽

2004 ◽

Vol 26 (1) ◽

pp. 61 ◽

Cited By ~ 3

Author(s):

DW Cooper

Keyword(s):

Immune Response ◽

New Zealand ◽

Immune Responses ◽

Fundamental Problem ◽

Public Perceptions ◽

Published Data ◽

Red Foxes ◽

European Rabbits ◽

Selection For ◽

Self Antigens

Immunocontraception involves eliciting an immune response against eggs, sperm or hormones so that successful reproduction is prevented. Work in Australasia is aimed at European rabbits (Oryctolagus cuniculus), red foxes (Vulpes vulpes), house mice (Mus musculus), common brushtail possums (Trichosurus vulpecula), koalas (Phascolartcos cinereus) and kangaroos (Macropus spp.), with the vaccines involved all containing self antigens or their relatives. Two fundamental problems have been inadequately addressed in this research. The first problem is that it is difficult to obtain strong immune responses against self antigens and so the vaccines may be ineffective. Most published data on the effect of immunocontraceptives on reproduction involve the use of an adjuvant of which there are many kinds. The materials enhance the immune response greatly. The most frequently used is Freund?s adjuvant which can cause chronic suffering. Its use on wildlife will lead to very negative public perceptions. There has been no convincing demonstration that successful immunocontraception is possible with any method of vaccination likely to be used in the field, if success is defined as contraception of a proportion of the population high enough for management requirements. If it is assumed that success can be achieved, the second fundamental problem arises with two potential consequences. Even with adjuvant, a substantial minority of the vaccinated animals remains fertile. The first consequence is that since failure to be contracepted is likely to be in part genetic, there is likely to be rapid selection for these non-responders. The method will become ineffective in a few generations. The second problem is that the offspring of the animals which breed will have altered immune responses. Their capacities to respond to their own pathogens or to harbor pathogens of other species in the same ecosystem are likely to be changed. The presence of chlamydia in P. cinereus and bovine tuberculosis in New Zealand T. vulpecula means that responses to these pathogens would have to be studied in offspring of immunocontracepted parents to ensure that the offspring were not more susceptible to them. New Zealand intentions to put an immunocontraceptive into a T. vulpecula gut worm must be viewed with caution by Australia. The eggs of transgenic worms will be easily transplanted either accidentally or deliberately back into Australia, and so infect T. vulpecula in Australia.

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Some basic concepts of pasture seed mixtures for New Zealand farms

Proceedings of the New Zealand Grassland Association ◽

10.33584/jnzg.1991.53.2009 ◽

1991 ◽

pp. 37-40

Author(s):

J.F.L. Charlton

Keyword(s):

New Species ◽

New Zealand ◽

Seed Production ◽

Seedling Establishment ◽

Early Years ◽

Seeding Rate ◽

Sowing Time ◽

Potential Problems ◽

Basic Concepts ◽

Species Mixtures

Seeds mixtures for New Zealand pastures developed from British practices with sowing of multi-species seeds mixtures during early years of settlement. Breeding and seed production of ryegrasses and clovers in the 1930s led to use of simple mixtures, still the most commonly used. Since the mid 197Os, new species have been released, and are now becoming more popular. Advantages and some potential problems of species mixtures are outlined, and simple concepts of compiling seeds mixtures are explained, with particular reference to seeding rate and sowing time. Keywords species, seeds mixtures, pasture renewal, sowing rates, seedling establishment, competition

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