A genetic examination of early flowering and maturity in Canadian spring wheat

Iqbal, Muhammad; Navabi, Alireza; Salmon, D. F.; Yang, Rong‐Cai; Spaner, Dean

doi:10.4141/p06-002

Cited by 24 publications

(20 citation statements)

References 47 publications

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“…The same result was reported in other works on wheat (Khalifa, 1998;Zhang et al, 1985;Iqbal et al, 2006;Bhatia et al, 1979;Sing & Paroda, 1986). For GFD under both locations and PH at Zarghan, the Baker ratio indicated the importance of non-additive gene effects.…”

Section: Baker Ratiosupporting

confidence: 79%

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Estimation of Genetic Parameters for Maturity and Grain Yield in Diallel Crosses of Five Wheat Cultivars Using Two Different Models

Zare-kohan¹,

Heidari²

2012

JAS

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Wheat maturity is important for its adaptability to different environments and geographical regions. In order to obtain genetic information for maturity and grain yield, five wheat cultivars of Cross adl, Marvdasht, Chamran, Shiraz and Darab2 were crossed for producing one-way diallel crosses that were analyzed using two models of Griffing (1956) and Jinks and Hayman (1953). Parents and their F 2 progenies were cultivated at two locations of Shiraz and Zarghan, Iran, in 2010-2011. The traits of interest were days to heading (DDH) and maturity (DDM), grain filling duration (GFD), grain yield per plant (GY) and plant height (PH). Genotype × location interaction was significant for PH and GFD but there was no interaction for DDH, DDM and GY. The variances due to general (GCA) and specific (SCA) combining abilities were significant for all the traits. Therefore, both additive and non-additive genetic components were not equally involved in genetic control of the characters studied. The GCA × location interaction was only significant for PH and GFD, an indication for the effects of environment on additive components. The Baker (1978) ratio for DDH (0.90 and 0.91 at Zarghan and Shiraz locations respectively), DDM (0.81 and 0.82) and GY (0.89 and 0.87) under both locations and for PH (0.88) at Shiraz showed the higher importance of additive variances in the genetic control of these traits. The GCA estimates revealed that Chamran for dwarfness, early heading and maturity and GFD, Darab2 for dwarfness, early heading and maturity, Marvdasht for GFD and GY were the best combiners. Graphical analysis and the average degree of dominance (less than 1) showed that gene action for all the traits was of partial dominance type.

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Section: Baker Ratiosupporting

confidence: 79%

“…Selection for early flowering under non-vernalized conditions may aid in the breeding of vernalization non-responsive or early-matured spring cultivars (Iqbal et al, 2006). Photoperiod responsive genes play a key role in heading time under field conditions in the cultivars that have already been vernalized (Snape et al, 2001).…”

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confidence: 99%

Estimation of Genetic Parameters for Maturity and Grain Yield in Diallel Crosses of Five Wheat Cultivars Using Two Different Models

Zare-kohan¹,

Heidari²

2012

JAS

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“…Early-maturing wheat has been correlated with increased yield in competitive organic farming systems (Mason et al 2007b) and early heading associated with competitive ability (Huel and Hucl 1996). Flowering in wheat is influenced by photoperiod, vernalization, and earliness per se genes (Iqbal et al 2006). Cousens et al (2003a) reported reduced time to flower did not increase competitive ability.…”

Section: Discussionmentioning

confidence: 99%

A genetic analysis of weed competitive ability in spring wheat

Reid¹,

Navabi²,

Cahill³

et al. 2009

Can. J. Plant Sci.

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. 2009. A genetic analysis of weed competitive ability in spring wheat. Can. J. Plant Sci. 89: 591Á599. Competition with weeds decreases crop yields globally. Breeding for competitive ability against elevated weed pressure can be difficult because the selection for specific traits which contribute to competitive ability may result in yield losses. The widely studied International Triticeae Mapping Initiative (ITMI) population was used to study the genetics of traits associated with competitive ability in a high latitude (52Á538N) wheatgrowing environment in central Alberta, Canada. Grain yield without weed competition and under experimentally sown cultivated oat competition exhibited similar heritability. Grain yield was positively correlated with early season vigour, and negatively correlated with days to maturity in the competitive treatment only. In this study, similar heritability estimates between competition treatments suggest that selection in a weed free environment can lead to improvements in a weedy environment, but some high-yielding lines under competition would be eliminated during selection.Key words: Wheat, weed competition, competitive ability, International Triticeae Mapping Initiative, genetic correlation Reid, T. A., Navabi, A., Cahill, J. C., Salmon, D. et Spaner, D. 2009. Ge´ne´tique de la capacite´compe´titive du ble´de printemps. Can. J. Plant Sci. 89: 591Á599. En ge´ne´ral, le rendement des cultures diminue quand celles-ci doivent concurrencer les mauvaises herbes. D'autre part, il est difficile d'ame´liorer la capacite´compe´titive des cultures en pre´sence d'adventices, car la se´lection des caracte`res responsables d'une telle ame´lioration peut entraıˆner une diminution du rendement. Les auteurs ont recouru a`la population fort bien e´tudie´e de l'International Triticeae Mapping Initiative (ITMI) pour approfondir la ge´ne´tique des caracte`res associe´s a`la capacite´compe´titive du ble´a`haute latitude (52Á538N), dans les conditions de culture particulie`res au centre de l'Alberta, au Canada. Le rendement grainier du ble´pre´sente la meˆme he´re´dite´en l'absence d'adventices qu'en pre´sence d'avoine seme´e expe´rimentalement. Le rendement grainer est positivement corre´le´a`la vigueur en de´but de saison et l'est ne´gativement au nombre de jours pre´ce´dant la maturite´, mais uniquement pour l'essai de concurrence. L'he´re´dite´analogue entre les diffe´rents sce´narios de concurrence estime´e dans le cadre de cette e´tude laisse croire que la se´lection sans concurrence de mauvaises herbes peut tout de meˆme conduire a`des ame´liorations en pre´sence d'adventices. Quoi qu'il en soit, certaines ligne´es tre`s productives en situation de concurrence pourraient eˆtre e´limine´es durant la se´lection.

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“…Winter wheat requires exposure to a continuous cold treatment (vernalization) prior to reproductive initiation. Spring wheat generally does not have such a requirement, but some cultivars do respond to cold by flowering early (Levy and Peterson 1972;Jedel et al 1986;Iqbal et al 2006). Vernalization sensitivity/insensitivity in hexaploid wheat is controlled by alleles at the major vernalization loci, Vrn-A1, Vrn-B1, Vrn-D1 and Vrn-D5 (Pugsley 1972).…”

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confidence: 98%

Genetic analysis of flowering and maturity time in high latitude spring wheat

et al. 2006

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Due to the short growing season in the high northern latitudes, the development of early maturing spring wheat (Triticum aestivum L.) cultivars is important to avoid frost damage which can lower production and quality. We investigated earliness of flowering and maturity, and some associated agronomic traits, using a set of randomly selected high northern latitude adapted spring wheat cultivars (differing in maturity) and their F 1 and F 2 crosses made in a one-way diallel mating design. The parents, and their F 1 and F 2 crosses were evaluated under field conditions over 2 years. Anthesis and maturity times were controlled by both vernalization response and earliness per se genes, mainly acting additively. Non-additive genetic effects were more important in controlling grain fill duration, grain yield and plant height. Additive · additive epistatic effects were detected for all traits studied except time to anthesis. Segregation analyses of the F 2 populations for time to anthesis indicated the presence of different vernalization response genes. Molecular genetic analyses revealed the presence of Vrn-A1 and Vrn-B1 genes in the parental cultivars. Narrow-sense heritability was medium to high (60-86%) for anthesis and maturity times but low to medium (13-55%) for grain fill duration, plant height and grain yield. Selection for early flowering/maturity in early segregating generations would be expected to result in genetic improvement towards earliness in high latitude spring wheats. Incorporation of the vernalization responsive gene Vrn-B1 in combination with vernalization non-responsive gene Vrn-A1 into spring wheats would aid in the development of early maturing cultivars with high grain yield potential for the high latitude wheat growing regions of the northern hemisphere.

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A genetic examination of early flowering and maturity in Canadian spring wheat

Cited by 24 publications

References 47 publications

Estimation of Genetic Parameters for Maturity and Grain Yield in Diallel Crosses of Five Wheat Cultivars Using Two Different Models

Estimation of Genetic Parameters for Maturity and Grain Yield in Diallel Crosses of Five Wheat Cultivars Using Two Different Models

A genetic analysis of weed competitive ability in spring wheat

Genetic analysis of flowering and maturity time in high latitude spring wheat

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