Genetic Crosses Experiments

Singh, Murari; Gupta, Sudhir; Parsad, Rajender

doi:10.1002/9781118147634.ch1

Cited by 10 publications

(9 citation statements)

References 78 publications

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“…This half‐diallel without parents was analyzed based on Griffing's (1956) Model 1, Method 4 to estimate GCA and SCA and their variances. A protracted individual analysis was executed using procedures and approaches suggested by the results of Singh et al (2012), Shang et al (2006), and Zhang and Kang (1997). Accuracy of this process was verified in advance with analysis on two different 10‐parent diallels with known results.…”

Section: Methodsmentioning

confidence: 99%

Diallel Analysis of Diverse Maize Germplasm Lines for Agronomic Characteristics

et al. 2014

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Diverse, novel maize (Zea mays L.) germplasm from the Genetic Enhancement of Maize (GEM) Project and aflatoxin‐resistant and aflatoxin‐susceptible maize lines were used as parents to produce a diallel cross. This manuscript documents the agronomic performance of the progeny of the diallel cross. Nine GEM germplasm lines and six known resistant and susceptible lines were selected as parents of a diallel cross that was evaluated over 2 yr at Mississippi State, MS, and 1 yr at College Station, TX. Mp317, Mp494, NEI9008, and GEMN‐0130 had positive and significant GCA effects for yield in at least two of the three environments. This is especially useful because prior research suggested that both Mp494 and GEMN‐0130 also reduce aflatoxin accumulation. Of the GEM lines evaluated, NEI9008 was the best source for enhanced yield with significant and positive GCA values across all three environments. Mp313E × GEMN‐0157 yielded well across all environments with an additional benefit of relatively low aflatoxin accumulation in the Mississippi environments. Because the GEM lines evaluated in this diallel cross have a distinctly different genetic background than the aflatoxin‐resistant Mississippi inbreds, NEI9008 and GEMN‐0130 (improved yield), GEMS‐0002 and GEMS‐0074 (earlier maturity by 3 to 4 d), CUBA117, GEMS‐0030, GEMN‐0071, GEMS‐0100 (reduced plant height 0.1 to 0.2 m), GEMN‐0157, NEI9008, GEMS‐0002, and GEMS‐0074 (reduced height by 0.3 to 0.4 m) should be useful sources of alleles for pyramiding improved yield, earlier maturity, and shorter plant heights into improved breeding lines.

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Section: Methodsmentioning

confidence: 99%

Diallel Analysis of Diverse Maize Germplasm Lines for Agronomic Characteristics

et al. 2014

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“…This half‐diallel without parents was analyzed with Griffing's (1956) Model 1, Method 4 to estimate GCA and SCA and their variances. Because published programs were not available to analyze this large 15‐parent diallel, a protracted individual analysis was executed using procedures and approaches suggested by the results of Singh et al (2012), Shang et al (2006), and Zhang and Kang (1997). Accuracy of this process was verified in advance with analysis on two different 10‐parent diallels with known results.…”

Section: Methodsmentioning

confidence: 99%

Diallel Analysis of Diverse Maize Germplasm Lines for Resistance to Aflatoxin Accumulation

et al. 2013

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In this study, diverse, novel maize (Zea mays L.) germplasm from the Germplasm Enhancement of Maize (GEM) Project was screened to determine the combining ability and inheritance of ear rot resistance and resistance to aflatoxin accumulation in hybrid combinations. Nine GEM germplasm lines and six known resistant and susceptible inbred lines were selected as parents of a diallel cross that was evaluated over 2 yr at Mississippi State, MS, and 1 yr at College Station, TX. Resistant lines Mp717 and Mp494 each had negative and significant general combining ability effects, and were frequently present as parents in the hybrid combinations with the lowest aflatoxin accumulation. Of the GEM germplasm lines evaluated, GEMN‐0130 was the best source of aflatoxin resistance, with significant and negative GCA values at all three site years. The GEM lines exhibiting significant and negative GCA effects for aflatoxin accumulation in at least one site year include two GEM germplasm lines, GEMS‐0030 (2 yr) and GEMS‐0074 (1 yr), and a nonreleased GEM source derived from the tropical Cuban accession, CUBA117 (1 yr). The GEM germplasm lines significantly contributing to reduced ear rot in at least two out of three environments included CUBA117, GEMS‐0030, GEMS‐0002, and GEMN‐0130. These results demonstrate the GEM Project is a useful and untapped source of diverse germplasm for resistance to Aspergillus flavus ear rot and aflatoxin accumulation.

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“…Griffing [9] gave four experimental methods: a) parental line combinations, one set of F 1 's hybrid and reciprocal F 1 's hybrid is included (all v = p 2 combination) b) parents and one set of F 1 's hybrid is included but reciprocal F 1 's hybrid is not (v = 1/2 p (p+1) combination) c) one set of F 1 's hybrid and reciprocal are included but not the parents (v =p (p-1) combination) and d) one set of F 1 's hybrid but neither parents nor reciprocals F 1 's hybrid is included (v = 1/2p (p-1) . The problem of generating optimal mating designs for CDC method D has been investigated by several authors Singh, Gupta, and Parsad [10].…”

Section: Introductionmentioning

confidence: 99%

Orthogonal Arrays and Row-Column and Block Designs for CDC Systems

Sharma

Tadesse

2018

CTBB

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design as environment design is needed for CDC method A, B and C. Agarwal and Das [11] used n-ary block designs in the evaluation of balanced incomplete block designs for all the four Griffing's [9] complete diallel cross (CDC) systems. Optimal block designs for CDC method a and b and variance balanced designs for CDC method c have been constructed by Sharma and Fanta [12,13] but their designs consume more experimental units. This call designs for

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Genetic Crosses Experiments

Cited by 10 publications

References 78 publications

Diallel Analysis of Diverse Maize Germplasm Lines for Agronomic Characteristics

Diallel Analysis of Diverse Maize Germplasm Lines for Agronomic Characteristics

Diallel Analysis of Diverse Maize Germplasm Lines for Resistance to Aflatoxin Accumulation

Orthogonal Arrays and Row-Column and Block Designs for CDC Systems

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