Comparative Performance of S<sub>1</sub> Progenies and Test‐Crosses of Corn<sup>1</sup>

Genter, C. F.; Alexander, M. W.

doi:10.2135/cropsci1962.0011183x000200060023x

Cited by 24 publications

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“…The same result was obtained by Center and Alexander (1962). The same authors also reported the results of two cycles of Sj^ progeny testing and testcross evaluation in the 'Corn Belt Southern Synthetic' (Center and Alexander, 1962). The mean yield of S^ lines increased 31.4% while in the testcross series the testcross yields increased 17.9%.…”

Section: Half-sib Family and Progeny Selectionsupporting

confidence: 66%

Comparison of half-sib and S1 recurrent selection in 'Krug Yellow Dent'

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Section: Half-sib Family and Progeny Selectionsupporting

confidence: 66%

Comparison of half-sib and S1 recurrent selection in 'Krug Yellow Dent'

Tanner

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“…Martin (1986) Beside results from simulation studies, there has been experimental evidence in maize supporting a general superiority of inbred familyselection methods. Center and Alexander (1962) compared the performance of SI progenies and testcrosses and concluded that if heterosis was a result of additive effects from dominant genes, progeny performance of early generation inbred lines should evaluate their general combining ability better than testcrosses. Center and Alexander (1966), working with Corn Belt Southern Synthetic, reported an increase of 31.4% and 17.9% in the mean yield of SI lines after two cycles of selection for SI families and testcrosses, respectively.…”

Section: Inbred Family Selectionmentioning

confidence: 99%

Efficiency of S2 recurrent selection for improvement of exotic and semi-exotic populations in maize (Zea mays L.)

Iglesias

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Iglesias, Carlos Ariel, "Efficiency of S2 recurrent selection for improvement of exotic and semi-exotic populations in maize (Zea mays L.) " (1989). Retrospective Theses and Dissertations. 9199. https://lib.dr.iastate.edu/rtd/9199 INFORMATION TO USERSThe most advanced technology has been used to photo graph and reproduce this manuscript from the microfilm master. UMI films the text directly from the original or copy submitted. Thus, some thesis and dissertation copies are in typewriter face, while others may be from any type of computer printer.The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleedthrough, substandard margins, and improper alignment can adversely affect reproduction.In the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion.Oversize materials (e.g., maps, drawings, charts) are re produced by sectioning the original, beginning at the upper left-hand corner and continuing from left to right in equal sections with small overlaps. Each original is also photographed in one exposure and is included in reduced form at the back of the book. These are also available as one exposure on a standard 35mm slide or as a 17" x 23" black and white photographic print for an additional charge.Photographs included in the original manuscript have been reproduced xerographically in this copy. Higher quality 6" x 9" black and white photographic prints are available for any photographs or illustrations appearing in this copy for an additional charge. Contact UMI directly to order. University Microfilms International 1989Signature was redacted for privacy.Signature was redacted for privacy.Signature was redacted for privacy.ii (Russell, 1986). Even if the most sophisticated and efficient breeding method is developed, the efforts of the breeder will be futile if the genes are not present in the original population. Choosing the initial germplasm and the breeding procedure are two equally important decisions that maize breeders have to make .The restricted genetic base of maize production and breeding in the U.S. Corn Belt region has two main consequences: an increased vulnerability of biological and environmental stresses; and a reduction in the genetic variability available to the breeder for selection. The emergence of many effective seed companies with extensive testing programs led to the identification of elite, widely adapted hybrids, from which both farmers and seed companies benefit (Bradley et al., 1988). Genetic vulnerability can be reduced if a measurement of genetic diversity for commercial hybrids could influence the farmer's choice among top performing hybrids, prompting seed companies to broaden the genetic base of their hybrids . 2When gerraplasm from a wild species or an exotic race contributes to a breeding program, it...

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“…Lonnquist and lAndsey (1964) reported a hi^er correlation between the yield of the inbred lines -per se and of the testcrosses "when an unrelated tester was used as compared with that obtained #ien the testcrosses were made to a related tester. Center and Alexander (1962) found The range of the seven plant, ear, and kernel characters was wider in the self progenies t)er se than in the testcrosses;…”

mentioning

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Influence of plant population levels on the correlation among agronomic characters of S2 lines of maize and of their testcrosses

Ortíz-Cereceres

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Comparative Performance of S₁ Progenies and Test‐Crosses of Corn¹

Cited by 24 publications

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Comparison of half-sib and S1 recurrent selection in 'Krug Yellow Dent'

Comparison of half-sib and S1 recurrent selection in 'Krug Yellow Dent'

Efficiency of S2 recurrent selection for improvement of exotic and semi-exotic populations in maize (Zea mays L.)

Influence of plant population levels on the correlation among agronomic characters of S2 lines of maize and of their testcrosses

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Comparative Performance of S1 Progenies and Test‐Crosses of Corn1

Cited by 24 publications

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Comparison of half-sib and S1 recurrent selection in 'Krug Yellow Dent'

Comparison of half-sib and S1 recurrent selection in 'Krug Yellow Dent'

Efficiency of S2 recurrent selection for improvement of exotic and semi-exotic populations in maize (Zea mays L.)

Influence of plant population levels on the correlation among agronomic characters of S2 lines of maize and of their testcrosses

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Comparative Performance of S₁ Progenies and Test‐Crosses of Corn¹