CITRUS BREEDING AND GENETIC IMPROVEMENT PROGRAMME IN CHINA

The objective of this study was to characterize the agro-morphological diversity of plantain accessions. 18 quantitative variables and 20 qualitative variables were measured. The results of the analysis of the qualitative variables revealed important traits such as black Sigatoka resistance of FHIA 21, Pita 3, M53, Calculta 4 and Banskii accessions and the firm fruit texture of Galeo, Kokor, French sombre and Corne 1 accessions. A Principal Component Analysis (PCA) performed with the quantitative variables separated the 9 accessions into 4 groups with particular and important characteristics which can be exploited differently in genetic improvement programme according to the breeding objective. From these results, it appears clearly that the objective is achieved.Keywords: Sigatoka, qualitative variables, quantitative variables, genetic improvement.

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BANANA GENETIC IMPROVEMENT PROGRAMME IN EXECUTION AT THE CNPMF/ EMBRAPA: RESULTS OBTAINED

Acta Horticulturae ◽

10.17660/actahortic.1995.370.9 ◽

1995 ◽

pp. 65-72

Author(s):

J. Dantas ◽

K. Shepherd ◽

W. Filho ◽

Z. Cordeiro ◽

S. Silva ◽

...

Keyword(s):

Genetic Improvement ◽

Improvement Programme

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The N'Dama cattle genetic improvement programme: a review

Animal Genetic Resources Information ◽

10.1017/s1014233900002200 ◽

2007 ◽

Vol 40 ◽

pp. 65-69 ◽

Cited By ~ 4

Author(s):

N.A. Bosso ◽

N. Corr ◽

M. Njie ◽

A. Fall ◽

E.H. van der Waaij ◽

...

Keyword(s):

Production System ◽

Genetic Improvement ◽

Implementation Process ◽

The Gambia ◽

Genetic Progress ◽

Low Input ◽

Improvement Programme ◽

N’Dama Cattle

SummaryThis paper reviews the successful N'Dama cattle genetic improvement programme implemented in a low input production system at the International Trypanotolerance Centre (ITC) in 1994, in The Gambia. The first part of the paper presents the genetic improvement programme. The second part deals with the analysis of the genetic improvement programme. The success of the genetic improvement programme expressed through genetic progress and the benefits for the farmers is encouraging. Recommendations to strengthen the implementation process in the field are made.

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Growth and carcass characteristics of crossbred (Mule) sheep

Proceedings of the British Society of Animal Science ◽

10.1017/s1752756200008516 ◽

2002 ◽

Vol 2002 ◽

pp. 195-195

Author(s):

A. M. van Heelsum ◽

R. M. Lewis ◽

W. Haresign ◽

D. Jones ◽

S. Williams ◽

...

Keyword(s):

Genetic Improvement ◽

Selection Index ◽

Carcass Characteristics ◽

Breeding Programme ◽

Carcass Quality ◽

Quality Traits ◽

Improvement Programme ◽

The Uk ◽

Terminal Sire ◽

Meat Sector

With increasing emphasis in the meat sector on better and more consistent quality, carcass leanness and conformation is now an important issue for sheep breeders. In 1999, only 47% of all carcasses in the UK met the target specifications for weight, fat and conformation (MLC, 2000), highlighting the potential for improvement. In the current stratified crossbreeding system, crossbred wether lambs are a by-product of the production of dam line ewes for the lowland sector. If their carcass quality is sufficient, they can give a valuable boost to the economics of the breeding programme. Genetic improvement of carcass quality in crossing sire breeds would benefit the crossbred wethers, as well as filter through to the terminal sire cross lambs produced by the crossbred ewes. This work aims to assess the influence of selection index and live conformation score of crossing sires (in this case Bluefaced Leicesters) on growth and carcass quality traits of their crossbred progeny, as a first step towards designing a genetic improvement programme for crossing sire sheep.

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Multiple Ovulation and Embryo Transfer in Hill Ewes

Proceedings of the British Society of Animal Production (1972) ◽

10.1017/s0308229600026350 ◽

1994 ◽

Vol 1994 ◽

pp. 88-88

Author(s):

W. Haresign ◽

B. Merrell ◽

R.I.W.A. Richards

Keyword(s):

Embryo Transfer ◽

Genetic Improvement ◽

Theoretical Studies ◽

Base Population ◽

Multiple Ovulation ◽

Female Line ◽

Improvement Programme ◽

Breed Improvement ◽

The Uk ◽

Selection Of

A breed improvement programme has been initiated at both ADAS Redesdale (Scottish Blackface) and ADAS Pwllpeiran (Welsh Mountain) to improve carcass conformation of hill ewes. From a base population of 1100 Welsh Mountain and 1600 Scottish Blackface ewes, nucleus flocks of 60 ewes have been established. Selection of ewes into the nucleus flock at each site has been based on their ability to consistently produce wether lambs crops with good conformation and above average carcass weights when selected for slaughter at a fat class 2/3L. The next objective is to replicate these ewes through multiple ovulation and embryo transfer (MOET) since theoretical studies (Smith, 1986) indicate that this can substantially increase the rates of genetic improvement through the female line. However, to date little work has been conducted to determine whether this technology can be successfully applied to hill sheep maintained in harsh hill environments in the UK, and this formed the basis of the current study.

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Evaluation of genetic variability in Spathoglottis species: A model orchid

Indian Journal of Agricultural Research ◽

10.18805/ijare.a-5069 ◽

2019 ◽

Author(s):

G. Seeja ◽

K. Arya ◽

C. K. Biju ◽

S. Sreekumar

Keyword(s):

Genetic Variability ◽

Coefficient Of Variation ◽

Genetic Improvement ◽

Morphological Difference ◽

Morphological Characteristics ◽

Flower Colour ◽

Genetic Advance ◽

Breeding Method ◽

Terrestrial Orchids ◽

Improvement Programme

Spathoglottis species are popular terrestrial orchids used as model for orchid studies. Due to alarming threat to species diversity, loss of habitat and increasing popularity, it needs to establish information on morphological characteristics as well as genetic variability for qualitative and quantitative traits to utilize for the genetic improvement programme and conservation of these endangered species. With these objectives an attempt was made to estimate genetic variability in terms of genetic component of variance, heritability and genetic advance in per cent of mean for biometrical traits and qualitative traits of four species viz, Spathoglottis albida Kraenzl., Spathoglottis gracilis Rolfe ex Hook.f., Spathoglottis unguiculata (Labill.) Rchb.f. and Spathoglottis plicata Blume. Results showed that flower colour, the colour and shape of the labellum and bracts were important characteristics used to resolve the morphological difference within Spathoglottis species. Biometrical traits viz, plant height, length of inflorescence, flower size, capsule size, number of flowers / inflorescence etc. involved significant role in the differentiation of species for utilization in the genetic improvement programme. Breeding method selection can be adopted for the genetic improvement programme since the genetic variability estimate revealed statistically significant high phenotypic coefficient of variation, genotypic coefficient of variation, heritability (broad sense) and genetic advance in per cent of mean for most of these biometrical traits.

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