Combining Ability and Heterosis among Eight Complete Spring Hexaploid Triticale Lines

Barker, Thomas C.; Varughese, George

doi:10.2135/cropsci1992.0011183x003200020012x

Cited by 14 publications

(6 citation statements)

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“…In all traits measured in this study GCA‐variances were higher than SCA‐variances. Similar results were found by Oettler (1988), Barker and Varughese (1992), Wegrzyn and Grzesik (1996) and Oettler et al. (2005).…”

Section: Discussionsupporting

confidence: 89%

A diallel analysis of various traits in winter triticale

Herrmann

2007

Plant Breeding

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In triticale, preharvest sprouting tolerance is important for yield stability and quality of the grain. Therefore, an experiment was conducted to estimate quantitative genetic parameters of preharvest sprouting tolerance in triticale using a diallel of eight modern triticale cultivars and breeding lines. The 28 F 1 -hybrids and the parents were planted in the breeding nurseries in 2001 and 2002 at four locations. Heading, plant height, falling numbers of two harvest dates, thousand kernel weight (TKW) and preharvest sprouting (Spr) were measured. The heritabilities for plant height and TKW were the highest with 0.91 and 0.85, respectively. Falling number and sprouting showed heritabilities between 0.66 and 0.83. Mid-parent heterosis (MPHET) was negative for heading, indicating a non-significant earlier heading of the F 1 -hybrids. In plant height and TKW the heterosis was positive with 4.7% and 6.3% MPHET. Both falling numbers displayed a negative MPHET of nearly )15%. In contrast to falling numbers, the preharvest sprouting of hybrids was slightly reduced in comparison with the parents. In all traits analysed, general combining ability (GCA)-variances were greater than specific combining ability (SCA)-variances.Quantitatively genetic parameters such as heritability and variance components are useful for designing new breeding programmes, predicting response to recurrent selection, allocating resources in field performance trials and constructing selection indices. The amount of heterosis as well as the GCA and SCA effects are important considerations for hybrid breeding. Furthermore, correlation coefficients between the features are useful because they give information about the effect of the selection on other traits. Indirect selection can be advisable if this is more practicable, other features are influenced positively, the genetic correlation is narrow between the two traits if the correlated trait has a higher heritability than the trait therein selected. The selection success can be estimated in the correlated feature if the heritabilities of both traits and the genetic correlation between them are known (Falconer 1984).Preharvest sprouting describes the germination of the grain in the ear prior to harvesting. Sprouting is preceded by an increased activity of hormones and starch-degrading enzymes (Gordon 1980), whose activities can be remarkably different in cereals without visual sprouting. The sprouting resistance can be measured within the breeding process by numerous methods such as ear examination in a moist atmosphere, the dormancy-index-test (Strand 1980) or by more indirect methods such as the Hagberg-falling-number measurement. As the falling number represents a particularly effective method, it has been widely used for decades in breeding of wheat, rye and triticale.In triticale, preharvest sprouting tolerance is important for yield stability and quality of seeds. The genetic inheritance and combining ability effects of sprouting tolerance in recent breeding material has not been investigated c...

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Section: Discussionsupporting

confidence: 89%

A diallel analysis of various traits in winter triticale

Herrmann

2007

Plant Breeding

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“…Pollen grains from a viable male parent can pollinate male sterile lines (seed parents) to a distance of 3–4 m away from the pollen source, ensuring ample pollen grains for hybrid seed production ( Góral, 2004 ). As a result, there has been a growing interest among breeders in developing hybrid triticale cultivars ( Barker and Varughese, 1992 ; Warzecha et al, 2014 ; Góral et al, 2015 ). Previous studies reported vigorous vegetative growth and high grain yield in triticale hybrids because of non-additive gene actions ( Barker and Varughese, 1992 ; Oettler et al, 2005 ).…”

Section: Conventional Triticale Breeding and Improvementmentioning

confidence: 99%

Triticale Improvement for Forage and Cover Crop Uses in the Southern Great Plains of the United States

et al. 2018

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Triticale (×Triticosecale Wittmack) is a man-made species developed by crossing wheat (Triticum spp.) and rye (Secale cereale L.). It incorporates favorable alleles from both progenitor species (wheat and rye), enabling adaptation to environments that are less favorable for wheat yet providing better biomass yield and forage quality. Triticale has huge potential for both grain and forage production, though research to improve the crop for better adaptation and grain quality is lagging behind that of other small grains. It is also gaining popularity as a cover crop to improve soil health and reduce nutrient leaching. Because of its genetic and flower structure, triticale is suitable for both line and hybrid breeding methods. Advances in the areas of molecular biology and the wealth of genomic resources from both wheat and rye can be exploited for triticale improvement. Gene mapping and genomic selection will facilitate triticale breeding by increasing selection precision and reducing time and cost. The objectives of this review are to summarize current triticale production status, breeding, and genetics research achievements and to highlight gaps for future research.

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“…Negative heterobeltiosis (−10.50% and −4.50%) was displayed by the cross combinations of SKD-1 × Moomal and TD-1 × Moomal. It is also reported diversified heterotic effects of parents and their F 1 hybrids for seeds spike −1 [35] [36].…”

Section: Number Of Seeds Spike −1mentioning

confidence: 99%

Heterosis and Combing Ability in F1 Population of Hexaploid Wheat (<i>Triticum Aestivum</i> L.)

Kalhoro¹,

Rajpar²,

Kalhoro³

et al. 2015

AJPS

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The heterosis, heterobeltiosis, general combining ability (GCA) and specific combining ability (SCA) were examined during Rabi (crop season) of 2013-2014 in hexaploid wheat genotypes. The experiment for this study was conducted at the Botanical Garden, Department of Plant Breeding & Genetics, Sindh Agriculture University Tandojam, Pakistan. The breeding material was comprised of four parents (Imdad, TD-1, SKD-1, and Moomal). These parents were crossed in half partial mating fashion; thus, six possible cross combinations (F1s) were obtained (Imdad × TD-1, Imdad × SKD-1, Imdad × Moomal, TD-1 × SKD-1, TD-1 × Moomal, and SKD-1 × Moomal). A three-replicated RCB Design was used. The mean squares corresponding to different traits of various hexaploid wheat genotypes indicated significant (P < 0.01) GCA (parents) and SCA (F 1 hybrids) effects for the characters (plant height, tillers plant −1 , spike length, spikelets spike −1 , seeds spike −1 , seed index, and grain yield plant −1). The mean performance of F 1 hybrids differed significantly (P < 0.01) for all the traits studied. Among the parents, Imdad and TD-1 proved to be better general combiners for almost all the studied traits. In regards to SCA effects, the F 1 hybrids Imdad × TD-1 and Imdad × SKD-1 expressed higher SCA and heterotic effects for most of the studied traits.

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Combining Ability and Heterosis among Eight Complete Spring Hexaploid Triticale Lines

Cited by 14 publications

References 0 publications

A diallel analysis of various traits in winter triticale

A diallel analysis of various traits in winter triticale

Triticale Improvement for Forage and Cover Crop Uses in the Southern Great Plains of the United States

Heterosis and Combing Ability in F1 Population of Hexaploid Wheat (<i>Triticum Aestivum</i> L.)

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Combining Ability and Heterosis among Eight Complete Spring Hexaploid Triticale Lines

Cited by 14 publications

References 0 publications

A diallel analysis of various traits in winter triticale

A diallel analysis of various traits in winter triticale

Triticale Improvement for Forage and Cover Crop Uses in the Southern Great Plains of the United States

Heterosis and Combing Ability in F1 Population of Hexaploid Wheat (&lt;i&gt;Triticum Aestivum&lt;/i&gt; L.)

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Heterosis and Combing Ability in F1 Population of Hexaploid Wheat (<i>Triticum Aestivum</i> L.)