Alterations in heterosis of maize populations derived from single-cross hybrids after reciprocal recurrent selection

This study was carried out to obtain the estimates of genetic variance and covariance components related to intra- and interpopulation in the original populations (C0) and in the third cycle (C3) of reciprocal recurrent selection (RRS) which allows breeders to define the best breeding strategy. For that purpose, the half-sib progenies of intrapopulation (P11and P22) and interpopulation (P12and P21) from populations 1 and 2 derived from single-cross hybrids in the 0 and 3 cycles of the reciprocal recurrent selection program were used. The intra- and interpopulation progenies were evaluated in a10×10triple lattice design in two separate locations. The data for unhusked ear weight (ear weight without husk) and plant height were collected. All genetic variance and covariance components were estimated from the expected mean squares. The breakdown of additive variance into intrapopulation and interpopulation additive deviations (στ2) and the covariance between these and their intrapopulation additive effects (CovAτ) found predominance of the dominance effect for unhusked ear weight. Plant height for these components shows that the intrapopulation additive effect explains most of the variation. Estimates for intrapopulation and interpopulation additive genetic variances confirm that populations derived from single-cross hybrids have potential for recurrent selection programs.

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Combining Ability and Heterosis of Algerian Saharan Maize Populations (Zea mays L.) for Tolerance to No-Nitrogen Fertilization and Drought

Agronomy ◽

10.3390/agronomy11030492 ◽

2021 ◽

Vol 11 (3) ◽

pp. 492

Author(s):

Meriem Riache ◽

Pedro Revilla ◽

Oula Maafi ◽

Rosa Ana Malvar ◽

Abderahmane Djemel

Keyword(s):

Zea Mays ◽

Stress Tolerance ◽

Nitrogen Fertilization ◽

Recurrent Selection ◽

Zea Mays L ◽

Base Material ◽

N Fertilization ◽

Nitrogen Stress ◽

Reciprocal Recurrent Selection ◽

Maize Populations

Drought and low nitrogen are major stresses for maize (Zea mays L.), and maize populations from the Sahara Desert are potential sources of stress tolerance. The objectives were to assess the tolerance and varietal and heterosis effects of Algerian populations under no-nitrogen fertilization and water stress. A diallel among six Algerian maize population was evaluated under drought (300 mm irrigation) vs. control (600 mm) and no-nitrogen fertilization vs. 120 kh ha−1 N fertilization. Genotypes showed significant differences and genetic effects for water- and nitrogen-stress tolerance. We propose a reciprocal recurrent selection to take advantage of additive and non-additive effects, using AOR and IGS, since they showed good performance in optimum and stress conditions, for improving yield heterosis for AOR × IGS. Negative effects are not expected on plant height, anthesis–silking interval or early vigor. These populations and BAH could be sources of inbred lines tolerant to drought and no-nitrogen fertilization. There was no relationship between origin and genetic group and stress tolerance per se or as parents of tolerant crosses. These populations and crosses could be used as base material among Algerian populations, for breeding programs focusing on tolerance to water or nitrogen stress.

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Reciprocal recurrent selection effects on the genetic structure of tropical maize populations assessed at microsatellite loci

Genetics and Molecular Biology ◽

10.1590/s1415-47572003000300022 ◽

2003 ◽

Vol 26 (3) ◽

pp. 355-364 ◽

Cited By ~ 14

Author(s):

Luciana Rossini Pinto ◽

Maria Lucia Carneiro Vieira ◽

Claudio Lopes de Souza Jr. ◽

Anete Pereira de Souza

Keyword(s):

Genetic Structure ◽

Microsatellite Loci ◽

Recurrent Selection ◽

Selection Effects ◽

Reciprocal Recurrent Selection ◽

Tropical Maize ◽

Maize Populations

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Evaluation of three cycles of full-sib reciprocal recurrent selection in two maize populations from the Northeast of Spain

Euphytica ◽

10.1007/s10681-012-0856-0 ◽

2012 ◽

Vol 191 (2) ◽

pp. 301-310 ◽

Cited By ~ 4

Author(s):

Javier Peña-Asín ◽

Ángel Álvarez ◽

Amando Ordás ◽

Bernardo Ordás

Keyword(s):

Recurrent Selection ◽

Reciprocal Recurrent Selection ◽

Maize Populations

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Interpopulation Genetic Variance after Reciprocal Recurrent Selection in BSSS and BSCB1 Maize Populations

Crop Science ◽

10.2135/cropsci1993.0011183x003300010016x ◽

1993 ◽

Vol 33 (1) ◽

pp. 90-95 ◽

Cited By ~ 19

Author(s):

Bruce J. Schnicker ◽

Kendall R. Lamkey

Keyword(s):

Genetic Variance ◽

Recurrent Selection ◽

Reciprocal Recurrent Selection ◽

Maize Populations

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Performance evaluation and genetic analysis of maize populations and diallel crosses under irrigated and drought-stressed conditions

Acta Agronomica Hungarica ◽

10.1556/aagr.57.2009.3.1 ◽

2009 ◽

Vol 57 (3) ◽

pp. 255-265

Author(s):

G. Evgenidis ◽

V. Mellidis ◽

C. Karamaligkas ◽

M. Koutsika-Sotiriou

Keyword(s):

Water Stress ◽

Drought Stress ◽

Diallel Analysis ◽

Diallel Crosses ◽

Maize Germplasm ◽

Maize Populations ◽

Single Cross ◽

Average Water ◽

Source Populations ◽

Single Cross Hybrids

This study aimed to assess the response of eight maize populations and their 28 diallel crosses to water stress and conventional irrigation. The source populations consisted of maize germplasm from CIMMYT and the F 2 generation of commercial single-cross hybrids. The trials were conducted at three locations in two successive years. Six characteristics relevant to drought stress were recorded. On average, water stress reduced the plant height and ear attachment height, and increased the number of days to silking and the anthesis to silking interval (ASI). The reductions were greater in the diallel crosses, and the increases in the parental populations. At one location, where irrigated and drought-stressed treatments were established side by side, diallel analysis for yield revealed that: (i) the control (B73 × Mo17) and the commercial hybrid Costanza had significantly reduced yield under drought stress; (ii) the general (GCA) and specific (SCA) combining ability were significantly higher in the irrigated experiments; and (iii) populations derived from the F 2 generation showed higher GCA.

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Diallel analysis of popcorn lines and hybrids for baby corn production

Cropp Breeding and Applied Biotechnology ◽

10.1590/1984-70332015v15n1n5 ◽

2015 ◽

Vol 15 (1) ◽

pp. 33-39 ◽

Cited By ~ 1

Author(s):

Lucas Rafael de Souza Camacho ◽

Carlos Alberto Scapim ◽

Henrique José Camargo Senhorinho ◽

Thiago Vincenzi Conrado

Keyword(s):

Recurrent Selection ◽

Diallel Analysis ◽

Hybrid Breeding ◽

Corn Production ◽

Breeding Programs ◽

Group I ◽

Synthetic Populations ◽

Single Cross ◽

Group Ii ◽

Single Cross Hybrids

The aim of this study was to evaluate the combining ability of popcorn lines and hybrids with favorable traits for baby corn production, using lines extracted from the major genotypes of the Brazilian germplasm. From nine popcorn lines, derived from the genotypes Zélia, CMS 42, CMS 43, UEM M2, Zaeli and IAC 112, 36 single-cross hybrids were obtained without reciprocals. In partial diallel crosses, 25 single-cross hybrids were obtained, derived from crosses of five lines of the Zaeli (group I) with five lines from IAC 112 (group II). We recommend using lines derived from Zaeli and CMS 42 in hybrid breeding programs for higher ear yields. The lines P9.5.1 and P9.5.5 (group I) and P8.3 and P8.5 (group II) can be recommended for recombination within each group and for the formation of two synthetic populations for recurrent selection, in order to increase ear yield.

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