Gene Action and Plant Breeding

Fasoula, Dionysia A.; Fasoula, Vasilia A.

doi:10.1002/9780470650097.ch9

Cited by 24 publications

(20 citation statements)

References 59 publications

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“…This results as ascertains that the fact of previous assumption for distinct the lines involved. This is in accordance with the statement that a selection scheme that allows parallel selection for general and specific adaptation from the first generation of the crop improvement program will increase efficiency (Fasoulas, 1993). This is because 100 large number of F 1 seeds are enough to establish a replicated honeycomb field trial with large replicates per cross.…”

Section: Resultssupporting

confidence: 86%

Effectiveness of Honeycomb Pedegree Selection in Intraspcific Cotton Cross.

Akhedar

2011

Journal of Agricultural Chemistry and Biotechnology

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The effectiveness of honeycomb pedigree selection (HPS) as compared to conventional pedigree selection (CPS) and mass selection (MS) were studied in one interaspecific cross between two promising hybrids Giza84 × (Giza74 × Giza 68) and Giza 77 × Pima S6. Combined selection for yield and lint quality traits was applied for three cycles. Finally, the best F5 lines derived by each method were tested in comparative experiments as randomized complete blocks design with three replications at Sakha Agric. Res. Station (2010). The analysis of variance indicated significant differences among of the selected lines for seed cotton yield and other traits except, for mean of boll weight. No significant differences were found between overall means of two groups CPS and HPS. In contrast, the mean of lines derived from third method MS. No significant differences however, were identified between the selected lines of the two methods (HPS and CPS) for lint quality traits. On the basis of mean seed cotton yield, boll weight, lint percent and fiber length as well as number of superior lines derived by each method. It was concluded that HPS was effective than CPS and MS in identifying lines with high yielding ability and a good lint quality. This superiority of HPS is attributed at least partially to its effectiveness in early segregating generation selection.

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Section: Resultssupporting

confidence: 86%

Effectiveness of Honeycomb Pedegree Selection in Intraspcific Cotton Cross.

Akhedar

2011

Journal of Agricultural Chemistry and Biotechnology

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“…In the vegetatively propagated potato, the single-plant yield distribution was skewed towards the low yield having a high CV of 94%, whilst in the autogamous tomato, a normal yield distribution was obtained with a CV of 26% (Fasoula and Fasoula 1997b). Following gene fixation in potato, unfavourable gene-to-gene interactions on account of the high load of deleterious genes led to unstable performance, whilst in tomato improved gene-to-gene interactions due to the reduced load of deleterious genes resulted in a much better stability.…”

Section: Cultivar Bufferingmentioning

confidence: 96%

“…In maize, a considerable amount of deleterious genes still exists, and the effects of these genes can be masked in single-cross hybrid cultivars through either dominant genes or through transcomplementation in the case of pseudo-overdominant alleles (Fasoulas 1993;Fasoula and Fasoula 1997b, 2002Tokatlidis et al 1999Tokatlidis et al , 2008a. The third pyramidal level is occupied by crops for which heterogeneous populations are still cultivated, like alfalfa.…”

Section: The Evolution Pattern Through Domestication and Crop Bufferingmentioning

confidence: 97%

“…Relevant to the first question is the pyramidal evolution pattern where crops are categorized into four main groups (Fasoulas 1993;Fasoula and Fasoula 1997b, 2002. The higher the position of a crop in the pyramid, the higher its position in the evolutionary scale, the smaller the load of deleterious genes it carries and, thus, the higher the degree of its genetic buffering.…”

Section: The Evolution Pattern Through Domestication and Crop Bufferingmentioning

confidence: 99%

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Development of crop cultivars by honeycomb breeding

Fasoula

Tokatlidis

2011

Agron. Sustain. Dev.

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The ability of agriculture to adapt to environmental changes and to address main issues of food quality and environment protection is a fundamental factor in achieving sustainability. Low yield capacity of contemporary sustainable farming systems, however, is a major obstacle to future growth of sustainable agriculture. In addition, increasing pressure is placed for higher food supply due to the projected population increase. To overcome these barriers and stimulate the wide adoption of sustainable agriculture, ample supply of cultivars that satisfy the requirements for sustainability without compromising productivity is essential. Otherwise, the viability of sustainable agriculture is unsound. Moreover, plant breeding has to be a non-stop process supporting agriculture because of the ongoing climate changes. The studies of the effects of competition on crop yield and selection efficiency unravelled important findings for plant breeders. Firstly, the uppermost cultivar type is the mono-genotypic and particularly the highest evolutionary grade of 'pure line'. Secondly, single plant selection is effective only when it is realized in the absence of competition for growth resources. Honeycomb methodology, by considering as a major principle the application of selection in the absence of competition, counteracts the disturbing effects of competition on selection effectiveness. Furthermore, the honeycomb experimental designs cope with the confounding implications of soil heterogeneity. These two findings help breeders to consider the individual plant as an evaluating and selection unit. As a consequence, the development of pure line cultivars that fully meet the needs of a sustainable agriculture is possible. Most importantly, honeycomb breeding exploits effectively not only favourable but marginal environments as well through the development of density-neutral cultivars. Marginal environments are exploited optimally when lower plant populations are used. It is of essence to realize that without the ability of exploiting successfully marginal environments which represent the majority of the production environments globally, sustainability in agriculture becomes problematic.

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“…The range of phenotypic expression is maximized because plants express their full genetic potential for tillering capacity and robust root systems [3][4][5][6][7]. Additional details on the principles of this methodology are discussed in the following review papers [2][3][4][5]8,9].…”

Section: Introductionmentioning

confidence: 99%

The Prognostic Breeding Application JMP Add-In Program

2019

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Prognostic breeding is a crop improvement methodology that utilizes prognostic equations to enable concurrent selection for plant yield potential and stability of performance. There is a necessity for plant breeders to accurately phenotype plants in the field and select effectively for high and stable crop yield in the absence of the confounding effects of competition. Prognostic breeding accomplishes this goal by evaluating plants for (i) plant yield potential and (ii) plant stability, in the same generation. The plant yield index, stability index and the plant prognostic equation are the main criteria used for the selection of the best plants and the best entries grown in honeycomb designs. The construction of honeycomb designs and analysis of experimental data in prognostic breeding necessitate the development of a computer program to ensure accurate measurement of the prognostic equations. The objective of this paper is to introduce the Prognostic Breeding Application JMP Add-In, a program for constructing honeycomb designs and analyzing data for the efficient selection of superior plants and lines. The program displays powerful controls, allowing the user to create maps of any honeycomb design and visualize the selected plants in the field. Multi-year soybean data are used to demonstrate key features and graphic views of the most important steps.

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Gene Action and Plant Breeding

Cited by 24 publications

References 59 publications

Effectiveness of Honeycomb Pedegree Selection in Intraspcific Cotton Cross.

Effectiveness of Honeycomb Pedegree Selection in Intraspcific Cotton Cross.

Development of crop cultivars by honeycomb breeding

The Prognostic Breeding Application JMP Add-In Program

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