Early selection for forcing ability in tulip (Tulipa L.) breeding

The potential for breeding Pinus radiata D. Don to improve wood stiffness (modulus of elasticity, MoE) was examined by obtaining pith-to-bark cores from trees at breast height in two independent genetic trials. The effectiveness of early selection for stiffness and indirect selection on the component traits, microfibril angle (MfA) and wood density, was determined as well as the age-related changes in the genetic variation of these traits. The first trial comprised 50 open-pollinated families in the central North Island, New Zealand. The second trial comprised 20 control-pollinated families in New South Wales, Australia. The genetic control of MfA, density, and MoE was found to be high in the corewood and moderate in the outerwood. Estimated genetic correlations suggested that early selection for most traits would be successful but could be carried out slightly earlier at the New Zealand site than at the Australian site. To maximize gain in the corewood, selection for MoE and MfA would be most effective around rings 4-8. There were no adverse correlations between MoE and MfA or density, implying that selection for MoE would also improve MfA and density.

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Early Selection for Wound Compartmentalization Potential in Woody Plants

Journal of Environmental Horticulture ◽

10.24266/0738-2898-2.4.126 ◽

1984 ◽

Vol 2 (4) ◽

pp. 126-128

Author(s):

Frank S. Santamour

Keyword(s):

Woody Plants ◽

Growing Season ◽

Early Selection ◽

Decayed Wood ◽

Reasonable Amount ◽

Controlled Potential ◽

Xylem Tissue ◽

Selection For

Young woody plants may be successfully screened for their genetically controlled potential to compartmentalize discolored and decayed wood associated with trunk wounds to small columns. To test woody plants for their compartmentalization potential, there should be a reasonable amount of xylem tissue, about 2 years' growth, interior to the experimentally inflicted wound and at least one full growing season should occur between the time of wounding and examination.

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Yield components and reproductive, physiological, and root traits used in early selection for nitrogen use efficiency in corn

Pesquisa Agropecuária Brasileira ◽

10.1590/s0100-204x2018000500011 ◽

2018 ◽

Vol 53 (5) ◽

pp. 620-632

Author(s):

Pedro Patric Pinho Morais ◽

Massaine Bandeira e Sousa ◽

Giovanni Galli ◽

Luciano Rogério Braatz e Andrade ◽

Roberto Fritsche-Neto ◽

...

Keyword(s):

Nitrogen Use Efficiency ◽

Yield Components ◽

Selection Index ◽

Root Traits ◽

Early Selection ◽

Nitrogen Use ◽

Nitrogen Levels ◽

Differential Behavior ◽

Use Efficiency ◽

Selection For

Abstract: The objective of this work was to examine the possibility of using yield components and reproductive, physiological, and root traits in early selection for nitrogen use efficiency (NUE) in corn. Sixty-four inbred lines were evaluated under two nitrogen fertilization levels: ideal and low. The evaluations were performed at three phenological stages: eight fully-expanded leaves, tasseling stage, and physiological maturity. It is possible to select superior lines for NUE, but the yield components did not show differential behavior under the different nitrogen levels evaluated. Root, reproductive, and physiological traits are not promising for early selection of corn lines with high NUE. Likewise, the eight-leaves and tasseling stages were not promising for this purpose, since NUE should be estimated taking grain yield into account. However, indirect selection for NUE can be performed via number of ears or using the selection index considering number and weight of ears.

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Age–age correlations and early selection for growth traits in 40 half-sib families of Larix principis-rupprechtii

Journal of Forestry Research ◽

10.1007/s11676-018-0706-6 ◽

2018 ◽

Vol 30 (6) ◽

pp. 2111-2117

Author(s):

Mingliang Dong ◽

Yingming Fan ◽

Zhihui Wu ◽

Futang Lv ◽

Jinfeng Zhang

Keyword(s):

Growth Traits ◽

Early Selection ◽

Sib Families ◽

Selection For

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Early selection for partial resistance to powdery mildew, Podosphaera leucotricha (Ell. et Ev.) Salm, in apple progenies

Developments in Plant Breeding - Progress in Temperate Fruit Breeding ◽

10.1007/978-94-011-0467-8_3 ◽

1994 ◽

pp. 13-15

Author(s):

J. Janse ◽

J. J. Verhaegh ◽

A. P. M. den Nijs

Keyword(s):

Powdery Mildew ◽

Partial Resistance ◽

Early Selection ◽

Podosphaera Leucotricha ◽

Selection For

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Correlated responses of height increment and components of increment in 2-year-old Douglas-fir

Canadian Journal of Forest Research ◽

10.1139/x89-170 ◽

1989 ◽

Vol 19 (9) ◽

pp. 1124-1130 ◽

Cited By ~ 12

Author(s):

Zeki Kaya ◽

R. K. Campbell ◽

W. T. Adams

Keyword(s):

Coastal Region ◽

Common Garden ◽

Douglas Fir ◽

Growth Patterns ◽

Early Selection ◽

Growing Seasons ◽

Bud Set ◽

Selection For ◽

The Difference ◽

Phenological Event

The consequences for growth and phenology of early selection for height or its growth components were evaluated in 160 open-pollinated families of Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) from southwestern Oregon. Seedlings from two inland and two coastal populations (40 families each) were grown for two growing seasons in a common garden. Predicted response to selection suggests that risk of low juvenile–mature correlation and maladaptation with early selection would be less in the inland than in the coastal region. A phenological event that influences a common growth pattern seems to account for the difference in response. Early bud set in the 1st year was genetically correlated with larger overwintering buds in seedlings from both inland and coastal regions. These larger buds yielded a large increment of predetermined growth in the 2nd year, followed by little or no free growth and early bud set. Seedlings with late bud set in the 1st year had the converse pattern. Inland seedlings set buds much earlier on the average than did coastal seedlings; hence seedlings from the two regions had different growth patterns. Risks that can attend early selection for height generally would be decreased in both regions by selecting for predetermined growth, but several qualifications are discussed.

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