Outcrossing

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Outcrossing In Peach

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Author : Pete Jay Miller
language : en
Publisher:
Release Date : 1987

Outcrossing In Peach written by Pete Jay Miller and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with categories.

Selection Against Inbreeding And Outbreeding

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Author : Bengt Hansson
language : en
Publisher:
Release Date : 1998

Selection Against Inbreeding And Outbreeding written by Bengt Hansson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.

Natural Outcrossing In Spaced Planted F2 Populations And Solid Seeded Advanced Generations Of Wheat Triticum Aestivum L Em Thell

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Author : Jerry K. K. Boinnet
language : en
Publisher:
Release Date : 1982

Natural Outcrossing In Spaced Planted F2 Populations And Solid Seeded Advanced Generations Of Wheat Triticum Aestivum L Em Thell written by Jerry K. K. Boinnet and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Wheat categories.

This study was conducted to investigate the possible contamination of foreign pollen at different stages of a wheat breeding program. These included spaced planted F2 segregating populations, replicated yield trials and seed multiplication. The experimental wheat materials consisted of four different F2 populations, four cultivars and two experimental lines. Two genetic marker lines, Blue Hyslop and Blue Norco were used to determine the amount of possible outcrossing. The pollen of these marker lines carry genetic factors for blue aleurone color, thus the extent of outcrossing (wherever outcrossing had occurred in the experimental populations) could be immediately observed and determined during the same crop season. The mean percent outcrossing recorded was less than 1% in spaced planted F2 populations, different replicated yield trials and seed multiplication conditions. The highest percentage of outcrossing of 5.6% was observed for a single plant in a spaced planted F2 population. Under yield trial conditions, the highest percentage of outcrossing of 0.6% was recorded for the cultivar Hill 81 whereas the lowest value of 0.1% was recorded for experimental line SPN/AU/YMH. Under seed multiplication conditions, a sample taken at 0.5 m away from blue aleurone pollen source in low density planting had a mean outcrossing value of 0.5% for the cultivar Jackmar. Pollen load of marker lines relative to that of all entries in low seeding rate was high, consequently, the low seeding rate had higher levels of outcrossing than the high seeding rate. No significant effect on outcrossing was observed for Seeding rate x Entry interaction. However, effects of entry and sampling distance on outcrossing were significant. As sampling distance increased from the blue aleurone pollen source, the level of outcrossing decreased. Low positive correlation of 0.12 and 0.14 existed between outcrossing and plant height and tillers per linear meter respectively. Correlation of 0.70 was found between natural outcrossing and wind velocity. Results of this study suggest that outcrossing can occur in all stages of a breeding program. The results also indicate that an isolation distance of 2 m established for multiplication of registered and certified seed in the certification program of Oregon State University might not be adequate especially for such cuitivars as Jackmar and Hill 81. Furthermore, the level of outcrossing detected was high enough to distort and perhaps alter the genetic identity and integrity of the breeding material. A similar problem will exist if care is not exercised when growing valuable wheat germplasm in various collection centers.

Outcrossing Rates Their Temporal Variation And Early Inbreeding Depression In Lodgepole Pine Pinus Contorta Vars Latifola And Murrayana

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Author : Michael Richard Carlson
language : en
Publisher:
Release Date : 1985

Outcrossing Rates Their Temporal Variation And Early Inbreeding Depression In Lodgepole Pine Pinus Contorta Vars Latifola And Murrayana written by Michael Richard Carlson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with categories.

The Evolution Of Outcrossing In Higher Plants With Special Reference To The Evolution Of Distyly

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Author : Gregory Stuart Byers
language : en
Publisher:
Release Date : 1981

The Evolution Of Outcrossing In Higher Plants With Special Reference To The Evolution Of Distyly written by Gregory Stuart Byers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Plant breeding categories.

An Analysis Of Outcrossing In Certain Complex Heterozygous Euoenotheras

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Author : Victor J. Hoff
language : en
Publisher:
Release Date : 1961

An Analysis Of Outcrossing In Certain Complex Heterozygous Euoenotheras written by Victor J. Hoff and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1961 with Oenothera categories.

Outcrossing And Instability In A Male Sterile Common Bean Phaseolus Vulgaris L

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Author : Sara Estrada
language : en
Publisher:
Release Date : 1983

Outcrossing And Instability In A Male Sterile Common Bean Phaseolus Vulgaris L written by Sara Estrada and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Beans categories.

Preliminary Investigations Of Inbreeding And Outcrossing In Larch

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Author : H. Keiding
language : en
Publisher:
Release Date : 1968

Preliminary Investigations Of Inbreeding And Outcrossing In Larch written by H. Keiding and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with categories.

Outcrossing In Field Populations Of Two Species Of Self Fertile Ascidians

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Author : S. COHEN
language : en
Publisher:
Release Date : 1990

Outcrossing In Field Populations Of Two Species Of Self Fertile Ascidians written by S. COHEN and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with categories.

Selective Pressures That Drive The Evolution And Maintenance Of Outcrossing

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Author : Levi Morran
language : en
Publisher:
Release Date : 2009

Selective Pressures That Drive The Evolution And Maintenance Of Outcrossing written by Levi Morran and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Bacterial genetics categories.