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Showing 1 to 20 of 24 for “"Recurrent selection"”.
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Estimation of genetic parameters in two maize recurrent selection programs
<p>Recurrent selection is a cyclical breeding procedure that focuses on improving the mean performance of a population by increasing the frequency of favorable alleles, while maintaining adequate genetic variability for continued selection. Iowa Stiff Stalk Synthetic (BSSS) is a maize population …
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Breeding for Extremes in Lodging Resistance in Corn by Reciprocal Recurrent Selection
Made available in DSpace on 2014-12-04T20:17:02Z (GMT). No. of bitstreams: 1 6003881.pdf: 2358277 bytes, checksum: 2eb9d6a4c9f77131c26001d00b94c57c (MD5) Previous issue date: 1960
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Divergent Phenotypic Recurrent Selection for Nitrate Reductase Activity and Correlated Responses in Maize
Divergent phenotype recurrent selection for post anthesis nitrate reductase activity (NRA) in maize was conducted through three cycles. The original material (C(,0)) was the maize (Zea mays L.) synthetic, Super Stiff Stalk Synthetic. The primary objectives were to determine: the selection response …
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Evaluation of 4 cycles of S1 recurrent selection in BSP1 and BSP2 popcorn populations
… objective of maize breeding programs. S1 recurrent selection has been shown to be an effective means of intrapopulation improvement for many different crops and has been practiced extensively in maize. The objective of this study was to evaluate the direct and indirect response of 4 cycles …
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The generalized inbreeding coefficient and the generalized heterozygosity index in a recurrent selection program
… coefficient In a finite population undergoing recurrent selection (self-select-intercross in succeeding generations) were investigated. It was noted that, in a population under selection, the inbreeding coefficient does not provide the experimenter with a measure of expected degree of …
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Evaluation of Recurrent Selection in Breeding Corn Resistant to the European Corn Borer (Pyrausta Nubilalis (Hbn.))
Made available in DSpace on 2014-12-04T20:17:07Z (GMT). No. of bitstreams: 1 6104304.pdf: 2125611 bytes, checksum: 6b78d5b1ee7ab33a6e7043f3eaeb7fd0 (MD5) Previous issue date: 1961
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Agronomic evaluation of four maize synthetics after recurrent selection for yield and evaluation of selected lines from the synthetics
<p>Reciprocal recurrent selection in the maize (Zea mays L.) populations, BSSS(R) and BSCB1(R), was compared with recurrent selection for general combining ability in BS13(S(,2)), and half-sib selection in the intervarietal cross, BS6(RS). The original and improved populations and population …
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Response to S1 recurrent selection and estimation of genetic parameters in effective population sizes of the BS11 maize population
<p>Recurrent selection is a cyclical breeding technique that has become popular in comprehensive maize improvement strategies. The magnitude of response in recurrent selection depends upon the modes of gene action and their frequencies in effective population sizes. We studied four effective …
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Evaluations of Some Hybrid Plant Materials of Possible Use in a Recurrent Selection Program for Protein in Soybean Seeds
Made available in DSpace on 2014-12-14T14:37:13Z (GMT). No. of bitstreams: 1 7524314.pdf: 3642677 bytes, checksum: fa3e04436dfd62d0b5381181f1664f3c (MD5) Previous issue date: 1975
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Agronomic and phenotypic responses to 75 years of recurrent selection for yield in the Iowa Stiff Stalk synthetic maize population
… production but have yet to be examined in a recurrent selection program.</p> <p>The objective of this experiment was to determine if direct selection for grain yield and agronomic performance in the Iowa Stiff Stalk synthetic population has indirectly improved adaptation to high plant …
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Genotype by Environment Interactions and Selection Responses of Two Maize Populations to Reciprocal Recurrent Selection in a High-Yield Environment (Corn)
A selection program using reciprocal recurrent selection procedures in maize (Zea mays L.) involving intra- and interpopulation selection were used for BS10 and RSSSC. Intrapopulation selection included phenotypic mass selection for multiple leaf and stalk-rot diseases resistance and S(,1) family …
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Genetic variation of the ribosomal DNA intergenic spacer of maize
… spacer (IGS) at initial and advanced cycles of selection. RSSSC and RBS10 underwent reciprocal recurrent selection with an inbred tester in a high yield environment, whereas BS10 and BS11 were subjected to full-sib reciprocal recurrent selection. Maize rDNA, is highly repetitive and shows IGS …
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Selection Response, Genetic Variation, and Combining Ability of High Oil Maize Genotypes
… grain yield in testcrosses should be achieved by recurrent selection using inbred LH185 as the tester without a great reduction in both oil and protein concentrations.
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Statistical genetics tools for empowered data-driven decisions
… we determined the optimal number of harvests for selection in cacao breeding, considering both recommendation and recombination. Chapter 2 explores the application of covariance structure modelling in two common scenarios of perennial plant breeding: multi-harvest and multi-site data analysis. …
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Inter-Population Maize Improvement in the F(2) and in the Bc(1) Following Elite Line by Broadbase Population Crosses (Linkage, Intra-Population Parameters)
… cross improvement from reciprocal recurrent selection (S(,1)RRS) and from fullsib RRS (S(,1)FSRRS) based on S(,1) testcross performance initiated in the F(,2)'s and in the BC(,1)'s for agronomically important traits. Because the F(,2)'s and the BC(,1)'s were not random mated, …
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Heterosis between semidormant and nondormant derived alfalfa germplasm
… States due to severe winterkill. Three cycles of recurrent selection were conducted in four nondormant cultivars and winter hardiness was substantially improved in all four. The objective of this study was to test the hypothesis that the nondormant derived alfalfa germplasm represents a heterotic …
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Inheritance of Weevil Resistance in Maize
… dominance(3.89).These findings suggested that recurrent selection for general combining ability or reciprocal recurrent selection for reduced grain weight loss as a measure of weevil resistance can be an appropriate breeding method to improve weevil resistance in maize. The same cyclic …
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Inheritance of Weevil Resistance in Maize
… dominance(3.89).These findings suggested that recurrent selection for general combining ability or reciprocal recurrent selection for reduced grain weight loss as a measure of weevil resistance can be an appropriate breeding method to improve weevil resistance in maize. The same cyclic …
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Stewart's and Goss' Wilts of Corn: Yield Reduction and Genetics of Resistance
… gene action. Therefore conventional recurrent selection procedures should be useful for developing corn genotypes resistant to both diseases.
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Combining ability study for the development of resistance to Aflation contamination by Aspergillus flavus link ex fries in groundnuts
… to aflatoxin contamination can be achieved via a recurrent selection procedure.
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