ABSTRACT
 A program has been carried out in New Zealand to develop a new meat goat breed by capitalizing on the dynamics of a large base population. Feral goats are relatively small with typical liveweights* of 26 pounds at weaning and 55 pounds at maturity for does and 35 pounds at weaning and 88 pounds at maturity for bucks.
  For example, one feral population studied in a farmed environment for over one year, at weaning time had mean liveweights for 61 mixed age adult does of 60.45 lbs., 26 doe kids 28.6 lbs., 14 mixed age adult bucks 62.04 lbs., 19 buck kids 31.19 lbs.. 
 The new KIKO breed is based on does screened from the large feral population mated to bucks from Anglo Nubian, British Toggenberg and Saanen breeds. With further crossbreeding, and interbreeding at F2 and F3 generations, stock have been selected solely for survivability and growth rate in a hill country pastoral environment. 
 In the 1985/86 season, at weaning time, mean liveweights for 102 adult does was 106.92 lbs., 60 doe kids 49 lbs., 92 buck kids 65.12 lbs., and adult bucks exceeded 220 lbs. 
 Mean liveweights at 8 months of all 1985 born kids in the central flock were 37 does 64.59 lbs. and 42 bucks 77.57 lbs. Farmed under typical New Zealand hill country pastoral conditions, KIKO kid growth rate from birth to weaning averaged 5.81 oz./day compared to Romney lambs 5.6 oz./day. KIKO goats have been exported to Pacific Island countries. In Western Samoa, 15 maiden does produced 33 kids with average birth weights of does 5.56 lbs. and of bucks 5.36 lbs. Subsequent growth rate to weaning averaged 6.3 oz./day (4.9-8.6 oz./day) .

INTRODUCTION
  Goats suit a wide range of agricultural systems throughout the world, being versatile and adaptable; their role in improved nutrition and income is being increasingly recognized. They are already an important source of meat being eaten by a wide range of people in many countries where the 400 million goats are farmed primarily for meat production.
  However, meat production per animal is not high, although it could be increased dramatically through breeding, feeding and animal health. The situation was summarized by G.C. Taneja at the Third International Conference on Goat Production
and Disease: "... considerable work appears to have been done in the world to increase milk production in goats through selection within breeds or crossing between breeds, but no attempt has been made in the area of systematic breeding of goats for meat...". This in part reflects farm structure with small goat flocks, and the logistical problems that inhibits improvement of indigenous breeds.
  The object of the project described in this paper was to accept the implicit challenge to develop a new breed capable of high performance to increase meat production under difficult conditions. The method chosen was to use the power of population dynamics on the large New Zealand feral goat population to select superior animals, to introduce genes for improved production, to crossbreed the best animals, to keep an open nucleus flock and to assess animals' performance under a range of testing conditions.
  After four generations of breeding, a dramatic improvement in liveweight and animal performance has been achieved and the new KIKO breed has been established.

PROCEDURES
  BASE GOATS. New Zealand feral goats are hardy but they are small and do not produce much milk.
  They derive from domestic goats liberated or escaped over the last 100 years of European settlement and represent an intermingling of European dairy goat breeds, Angoras, and Ñ to a minor extent Ñ native goats of other countries. They live in light bush margins and open grass and tussocklands and have developed inherent hardiness under poor feeding conditions. They are relatively small.
 Although individual sub-flocks can contain superior animals, in general the weight range is not large. New Zealand feral goats do not produce large quantities of milk. Experience with over 500 feral does under commercial conditions in Nelson in 1980/81 showed individual peak yields of no more than 2.65 quarts per day and average five-month lactation yield of 1.59 quarts per day.
 The project to capitalize on feral goat hardiness and to improve growth rate commenced in 1978 when 20 does were selected from New Zealand-wide feral herds numbering over 1,000. Selection was based on high liveweight, freedom from constitution faults such as misshapen feet and jaws, apparent milk production potential as indicated by udder size, and a block body shape indicating superior fleshing.

  DAIRY GOATS. Early kid growth rate is directly related to milk intake, so it was important to develop a breed with adequate milk production. Introducing genes from milking breeds was an obvious choice.
  Bucks used in the first three generations of KIKO development came from commercially managed dairy goat herds. They were progeny of large, high producing does of sound conformation especially in the milk production area, and met the size and meat production criteria.
  Dairy goat breeds in New Zealand are Saanen, British Toggenberg, British Alpine and Anglo Nubian in that order of decreasing numbers with the last three having narrow genetic bases. No buck has been chosen primarily for breed so blood from all breeds has been introduced in varying proportions.

  INTERBREEDING. Mating plans and decisions have been assisted by advice and guidance from geneticists in Ministry of Agriculture and Fisheries. The general policy has been to mate best bucks to best does.
  Since 1984, some bucks of the new KIKO breed have been used, but 1986 was the first year that no outside bucks were used. Assessment of all stock has been based solely on survivability and growth rate in a policy of simplifying selection criteria and maximizing progress. The herd has slowly been increased by adding outside does if they met the selection criteria, and from progeny if they were in the top half of their progeny group measured for growth and fertility and if they were superior to does already in the flock.
  Does have been constantly assessed, especially on their progeny quality and an elite flock of 50 does developed within the current flock of 150 does.

  FLOCK MANAGEMENT. The breeding flock has been farmed on steep hill country under nutritional conditions classed as demanding Ñ grazing unfertilized pastures of Browntop (Agrostis spp), Danthonia spp, Vulpia spp, Rattail (Sporobolus capensis) and native legume species with interspersed rushes (Juncus spp) and gorse (Ulex europus) shrubs. There has been no supplementary feeding, even in conditions of feed shortage.
  Husbandry inputs have been minimal. No hooves are trimmed and goats developing foot problems are culled. Internal parasite control is restricted to 2-3 drenches per annum for adults and 5 drenches for young animals in their first year.
  Stocking rate is considered to be high at 7.5 does plus progeny per hectare (2.47 acres) plus 11 sheep per hectare run in conjunction so that goats are under some group pressure throughout their lives.
  Normal goat management is practiced. Does are single sire mated to selected bucks in autumn to kid in spring, weaning kids at four months of age. Synchronized mating produces concentrated kidding, which facilitates management and record keeping.
  Animals have been weighed at regular intervals to accumulate growth-rate data, have been recorded for production characteristics of self and progeny and analyzed for 
contribution to breed development.

  EXTERNAL TESTING. Both bucks and does have been sold to other environments for testing. Western Samoa has farmed 15 does and 20 bucks for three years, and 18 does and 2 bucks went to Niue in 1985. In New Zealand, KIKO bucks have been used in a range of environments ranging from high-fertility plains to steep hill country.

 NEW GENETIC MATERIAL. The open nucleus system allows does of demonstrable superiority to join the elite flock from outside the on-farm program. In 1986, KIKO bucks were mated to 600 does selected for large size on three other farms. Female
progeny will be screened and brought to the central flock site for comparison and assessment on suitability for inclusion in the elite flock which is reassessed each year. This programme be extended to 1000 does for 1987 mating.

RESULTS

  The KIKO breed has evolved to meet demanding testing conditions in New Zealand and Pacific Island countries. It is an amalgam of various genetic resources and now has no definable proportions of known breeds. It has been selected solely for survivability and growth rate under commercially farmed conditions, although these conditions also result in exclusion of goats with poor conformation, fertility, milk production and temperament. Consequently there is no common coat color or pattern, nor breed type.
  As survivability and high growth rate are major characteristics of the breed, performance under testing conditions is important.
  Prolificacy has not been sacrificed for size. To be eligible for the elite flock, does must produce twins at first kidding. In 1986, the 100 commercial flock weaned 120 kids and the 50 elite flock weaned 81 kids.
 Introducing new breeds to increase production from indigenous goats is a recognized and practiced strategy (Gall 1981, Taneja 1983). Specialized breeds often have difficulty producing to their potential in the new environment, and crossbreeding after the first generation may not demonstrate any superiority (Sanforienzo 1957, 1962). The KIKO, with its selected crossbred base, has stabilized the aspects of increased production and demonstrated superiority over other breeds.
  For example, KIKO does in Western Samoa outperformed imported Fijian Nubian-based meat does (J. Kilduff personal communication). Despite continued acquisition and evaluation since 1981 of 27 Saanen crossbred does and 31 Anglo Nubian crossbred does, they have not been of sufficient merit to enter the New Zealand flock.

CONCLUSIONS

  Four generations of controlled breeding and crossbreeding have improved the productivity of a selected group of New Zealand feral goats so that KIKO goats are now twice the size of the average New Zealand feral goat.
  Use of an open nucleus flock and population dynamics has created a breeding structure that has produced this result and this is capable of further amendment and improvement.
  Selection for two major factors only has maximized progress in those factors (survivability and growth rate) and facilitated best to best mating.
  Introduction of milk production genes from selected sources has increased kid growth rate, but emphasis on survivability has mitigated against incorporation of the poor features of dairy goats.
  The testing environment and low input husbandry system has identified weak and less productive animals facilitating culling and breeding decisions.
  KIKO goats are genetically capable of high levels of meat production and can produce well under the wide range of conditions in which they have been tested in New Zealand and overseas countries. They are a suitable breed to introduce to countries seeking a better breed of meat goat. They are also an "improver" breed that can add size, growth rate and milk production to local stock without reducing hardiness.

*Metric weights have been converted to pounds or ounces.