Genotype × trial interaction and stability across sites in 11 combined provenance and clone experiments with Picea abies in Denmark and Sweden

2001 ◽  
Vol 31 (10) ◽  
pp. 1826-1836 ◽  
Author(s):  
Bo Karlsson ◽  
Hubert Wellendorf ◽  
Hans Roulund ◽  
Martin Werner
Keyword(s):  
Picea Abies ◽  
Growth Traits ◽  
Growth Increment ◽  
Breeding Strategy ◽  
Trial Interaction ◽  
Genetic Constitution ◽  
Environment Interaction ◽  
Spring Frost ◽  
Genotype Environment Interaction ◽  
Late Spring Frost

In 1997, eleven combined Picea abies (L.) Karst. provenance and clone trials were assessed in two series, with identical genetic constitution and design, in locations ranging from western Denmark to central Sweden, after 14 and 11 years, respectively. The phenotypic variation was larger for mixtures of 24 clones than for seedlings in one series, although 10 times more genotypes were represented amongst the seedlings. This was explained by random C-effects due to propagation. Provenances of seedlings and clone mixtures were fairly stable across sites. Statistically significant clone × trial interaction of growth traits were of the same magnitude as the clonal effects. The median genotypic correlation across sites for total height growth was 0.54. Ecovalence values for growth indicated that most clones contributed about equally to the interaction, with a tendency for clones with early bud break to give a larger contribution. Damage caused by late spring frost was assumed to be a main cause of genotype × environment interaction. Since interactions relatively were more pronounced for growth increment than for the latest height, the interaction seems to increase with age. Cluster analysis based on genotypic correlations between pairs of trials gave a very scattered geographic pattern of the test sites. The results did not justify any suggestions for changes in the P. abies breeding strategy.

Genetic parameters and genotype–environment interactions of Chinese fir (Cunninghamia lanceolata) in Fujian Province

2014 ◽  
Vol 44 (6) ◽  
pp. 582-592 ◽  
Author(s):  
Liming Bian ◽  
Jisen Shi ◽  
Renhua Zheng ◽  
Jinhui Chen ◽  
Harry X. Wu
Keyword(s):  
Genetic Parameters ◽  
Breeding Strategy ◽  
Chinese Fir ◽  
Breeding Program ◽  
Cunninghamia Lanceolata ◽  
Environment Interaction ◽  
Fujian Province ◽  
The Third ◽  
Genotype Environment Interaction ◽  
Sib Families

Chinese fir (Cunninghamia lanceolata (Lamb.) Hook) is the most commercially important conifer in China, and the Nanjing Forestry University – Fujian Province Chinese fir Cooperation (NJFU – Fujian Cooperation) breeding program has advanced it into the third cycle of selection and breeding. In this paper, we estimated genetic parameters from four sites for 80 half-sib families and summarized previous estimates of genetic parameters in Chinese fir with an objective to propose optimal breeding strategy. Heritability averaged 0.20 and 0.14 for height and diameter at breast height (DBH), respectively, for the four sites. A significant genotype–environment interaction (G × E) for growth was also observed among the four sites, with the greatest interactions between a marginal site and the three central sites in the Fujian Province Chinese fir plantation region. The average estimated type-B genetic correlation between the marginal site and the three central sites was 0.08 for height and –0.09 for DBH. However, the highly productive families were among the most stable across the four sites. The results from this study in combination with summarized genetic parameters from literature were used to discuss and propose an optimal breeding strategy for the third generation of the breeding program for Chinese firs in Fujian Province.

scholarly journals Adaptability of Narrow-Crowned Norway Spruce Ideotype (Picea abies (L.) Karst. pendula Form) in 25 Years Half-Sib Comparative Trials in the Eastern Carpathians

Forests ◽  
2019 ◽  
Vol 10 (5) ◽  
pp. 395 ◽  
Author(s):  
Ecaterina Apostol ◽  
Marius Budeanu
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Wood Density ◽  
Environmental Conditions ◽  
Growth Traits ◽  
Natural Populations ◽  
Tree Height ◽  
Field Trials ◽  
Breeding Strategy ◽  
Eastern Carpathians

This study analysed the stability of the narrow-crowned Norway spruce (pendula form) compared with the classic form of spruce (pyramidalis form) in two half-sib field trials located in the Romanian Carpathians. From eight natural populations, representative of three of the four large spruce spread areas in Romania, open-pollinated seeds from 48 trees (24 pendula ideotype and 24 pyramidalis form) were collected to install the Maneciu and Soveja trials. In these trials, at age 25 years, measurements were performed for the following traits: tree height, breast height diameter, crown diameter, number of branches per whorl and dominant branch diameter. Some important traits were calculated: average volume per tree, trees’ slenderness, crown slenderness and branches’ finesse. Pearson’s simple correlations between the analysed traits were calculated and also the correlations between traits and geographic and climatic gradients of provenances’ origin. In addition, cores were collected to compare the wood density of the two forms of spruce. In both trials, but especially in the limitative environmental conditions of the Soveja trial, the narrow crowned form of Norway spruce (Picea abies f. pendula) presented more favourable average results than the normal crown spruce form for the most important stand stability traits: trees’ slenderness, wood density, branches’ diameter and branches’ finesse. Between spruce crown forms, in both trials, no significant differences were observed for the growth traits, but between trials, higher results resulted in optimal environmental conditions of the Măneciu test (+89% for the trees’ volume). The trees from different provenances and with specific forms of the crown reacted differently to the changing of the testing site, which required the adoption of maximum caution for decisions regarding the transfer of forest reproductive materials. The correlations between the analysed traits converge towards the adoption of a two-step breeding strategy, starting by selection of narrow crowned trees after stability traits.

Genetic parameters and genotype-environment interaction for growth traits of North African catfish, Clarias gariepinus (Burchell, 1822)

Aquaculture ◽  
2019 ◽  
Vol 501 ◽  
pp. 104-110 ◽  
Author(s):  
Witsanu Srimai ◽  
Skorn Koonawootrittriron ◽  
Wiroon Manee-aphai ◽  
Satid Chatchaiphan ◽  
Urai Koolboon ◽  
...  
Keyword(s):  
Genetic Parameters ◽  
Growth Traits ◽  
Clarias Gariepinus ◽  
African Catfish ◽  
Environment Interaction ◽  
North African ◽  
Genotype Environment Interaction

Genotype×environment interaction for growth traits of Nile tilapia in biofloc technology, recirculating water and Cage systems

Aquaculture ◽  
2016 ◽  
Vol 460 ◽  
pp. 98-104 ◽  
Author(s):  
Eduardo Maldonado Turra ◽  
Fabio Luiz Buranelo Toral ◽  
Érika Ramos de Alvarenga ◽  
Fernanda Santos Silva Raidan ◽  
Arthur Francisco de Araújo Fernandes ◽  
...  
Keyword(s):  
Nile Tilapia ◽  
Growth Traits ◽  
Environment Interaction ◽  
Genotype Environment Interaction ◽  
Biofloc Technology

GENOTYPE × ENVIRONMENT INTERACTIONS FOR POSTWEANING GROWTH PERFORMANCE OF BACKCROSS BULLS

1987 ◽  
Vol 67 (2) ◽  
pp. 359-370 ◽  
Author(s):  
G. W. RAHNEFELD ◽  
R. M. McKAY ◽  
H. T. FREDEEN ◽  
G. M. WEISS ◽  
J. A. NEWMAN ◽  
...  
Keyword(s):  
Growth Rates ◽  
Fixed Effects ◽  
Performance Test ◽  
Growth Traits ◽  
Average Daily Gain ◽  
Environment Interaction ◽  
Test Results ◽  
Ge Interaction ◽  
Genotype Environment Interaction ◽  
Daily Gain

The effects of pretest and genotype × environment (GE) interactions of 137 reciprocal backcross bulls produced under two contrasting environments (Brandon, Manitoba and Manyberries, Alberta) were evaluated for postweaning performance traits. Differences in weaning weight and average daily gain during the pretest periods defined as preweaning (ADGBW), weaning to on-test (ADGWT), and birth to on-test (ADGBT) associated with the fixed effects of station of origin, breed cross and station of origin by test were not significant. Station of test effects were significant (P = 0.0001) for ADGWT and ADGBT. None of the GE interactions involving the station of origin was significant (P > 0.10) for the postweaning growth traits and probabilities exceeded 0.20 for all but three of the 40 traits. The GE interactions involving station of test were nonsignificant (P > 0.20) for all but eight traits. All of these exceptions involved the cumulative average daily gain in the eight periods which excluded the first 14 d of test. Although the GE interaction for average daily gain for 140 d of test was not significant there were substantial breed cross differences in growth rates at the two test locations. Users of performance test results, however, are generally concerned with absolute performance values, not statistically significant differences. Viewed in this context, the differential responses of genotypes under different test environments, even though statistically nonsignificant, could have important implications to the industry. Key words: Cattle, postweaning growth, genotype × environment interaction

Genetic parameters and gains for growth and wood properties in Florida source loblolly pine in the southeastern United States

2002 ◽  
Vol 32 (6) ◽  
pp. 1025-1038 ◽  
Author(s):  
Ryan A Atwood ◽  
Timothy L White ◽  
Dudley A Huber
Keyword(s):  
United States ◽  
Specific Gravity ◽  
Loblolly Pine ◽  
Growth Traits ◽  
Southeastern United States ◽  
Genetic Correlations ◽  
Wood Properties ◽  
Environment Interaction ◽  
Breeding Programs ◽  
Genotype Environment Interaction

One hundred and thirteen open-pollinated families from Florida source loblolly pine (Pinus taeda L.) were tested in four states in the southeastern United States. Heritabilities and genetic correlations were estimated for volume, specific gravity, and latewood percentage at three different growth stages: juvenile (ages 0–10 years), mature (11–17 years), and total (0–17 years). Heritabilities of growth traits (0.09–0.11) were consistently lower than for wood property traits (0.16–0.33). Growth traits for Florida loblolly exhibited high genotype × environment interaction (rB = 0.44), whereas wood properties did not (rB = 0.90). The higher heritabilities and genetic stability across environments make wood properties amenable to genetic manipulation through breeding programs. In contrast, the high genotype × environment interaction of growth traits for Florida loblolly pine requires more research to understand the possible implication of these effects on breeding programs. Trait–trait and age–age genetic correlations were determined for growth and wood properties. Strong positive age–age correlations were present for latewood percentage, volume, and specific gravity. Weak negative trait–trait genetic correlations existed between specific gravity and volume across ages (–0.13 to –0.43). No genetic correlation existed between latewood percentage and volume, while a moderate favorable genetic correlation existed between latewood percentage and specific gravity (0.47 to 0.59). Genetic gains in volume and specific gravity were compared for various types of selection. In one type, forward selection of the top 20 individuals (of 3484) based on 17-year volume, resulted in a 20.5% genetic gain in volume; however, a concomitant loss of –6.4% also occurred in specific gravity. If a selection index was used to hold specific gravity constant, a gain in total volume of 14% was obtained.

Genotype—Environment Interaction in Calf Production. I. Growth Traits

1972 ◽  
Vol 35 (2) ◽  
pp. 317-320 ◽  
Author(s):  
E. B. Burnside ◽  
T. R. Batra ◽  
G. K. Macleod ◽  
D. G. Grieve
Keyword(s):  
Growth Traits ◽  
Environment Interaction ◽  
Genotype Environment Interaction

Genotype-Environment Interaction in Calf Production. II. Live Measurements and Carcass Traits

1973 ◽  
Vol 36 (3) ◽  
pp. 471-475 ◽  
Author(s):  
T. R. Batra ◽  
W. R. Usborne ◽  
D. G. Grieve ◽  
E. B. Burnside
Keyword(s):  
Carcass Traits ◽  
Environment Interaction ◽  
Genotype Environment Interaction

METHODS FOR EVALUATING THE GENOTYPE-ENVIRONMENT INTERACTION IN BREEDING WINTER WHEAT FOR PRODUCTIVITY

2020 ◽  
Vol 15 (1) ◽  
pp. 56-64
Author(s):  
Irina Manukyan ◽  
◽  
Madina Basieva ◽  
Elena Miroshnikova ◽  
◽  
...  
Keyword(s):  
Winter Wheat ◽  
Environment Interaction ◽  
Genotype Environment Interaction
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