Genetic analysis of a two-row × six-row cross of barley using doubled-haploid lines

Jui, P. Y.; Choo, T. M.; Ho, K. M.; Konishi, Tadataka; Martin, Richard A.

doi:10.1007/s001220050450

Cited by 40 publications

(31 citation statements)

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“…The results presented in this study are consistent with previous reports on the relationship of inflorescence type and multiple agronomic traits in barley (Jui et al 1997;Kjaer and Jensen 1996;Powell et al 1990) on the effects of the loci determining inflorescence type (vrs1 and int-c) on multiple agronomic traits. Our QTL analysis of agronomic traits could not distinguish between linkage and pleiotropy for yield, kernel plumpness, test weight, 635 Fig.…”

Section: Discussionsupporting

confidence: 83%

“…Allard (1988) concluded that ''Evidently the two-row/six-row locus affects developmental processes in ways that leave few quantitative characters untouched" and ''this locus had large effects on survival and adaptedness". Large pleiotropic effects on multiple phenotypes are attributed to alleles at the vrs1 locus based on studies of the progeny of two-rowed×six-rowed crosses (Kjaer and Jensen 1996;Jui et al 1997). However, it is possible that the correlated phenotypes are due to linkage rather than pleiotropy.…”

Section: Introductionmentioning

confidence: 99%

“…QTLs for a range of economically important phenotypes are reported throughout the genome (Hayes et al 1993;Mather et al 1997;Powell et al 1990;Tinker et al 1996) including the region of chromosome 2 (2H) where vrs1 is located (Zhu et al 1999). QTL studies based on progeny of two-rowed×six-rowed crosses consistently report determinants of agronomic and malting quality traits in regions coincident with the vrs1 and int-c loci (Jui et al 1997;Kjaer and Jensen 1996;Marquez-Cedillo et al 2000;Powell et al 1990). …”

Section: Introductionmentioning

confidence: 99%

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QTL analysis of agronomic traits in barley based on the doubled haploid progeny of two elite North American varieties representing different germplasm groups

et al. 2001

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A better understanding of the genetics of complex traits, such as yield, may be achieved by using molecular tools. This study was conducted to estimate the number, genome location, effect and allele phase of QTLs determining agronomic traits in the two North American malting barley (Hordeum vulgare L.) quality variety standards. Using a doubled haploid population of 140 lines from the cross of two-rowed Harrington×six-rowed Morex, agronomic phenotypic data sets from nine environments, and a 107-marker linkage map, we performed QTL analyses using simple interval mapping and simplified composite interval mapping procedures. Thirtyfive QTLs were associated, either across environments or in individual environments, with five grain and agronomic traits (yield, kernel plumpness, test weight, heading date, and plant height). Significant QTL×environ-ment interaction was detected for all traits. These interactions resulted from both changes in the magnitude of response and changes in the sign of the allelic effect. QTLs for multiple traits were coincident. The vrs1 locus on chromosome 2 (2H), which determines inflorescence row type, was coincident with the largest-effect QTL determining four traits (yield, kernel plumpness, test weight, and plant height). QTL analyses were also conducted separately for each sub-population (six-rowed and two-rowed). Seven new QTLs were detected in the sub-populations. Positive transgressive segregants were found for all traits, but they were more prevalent in the six-rowed sub-population. QTL analysis should be useful for identifying candidate genes and introgressing favorable alleles between germplasm groups.

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Section: Discussionsupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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QTL analysis of agronomic traits in barley based on the doubled haploid progeny of two elite North American varieties representing different germplasm groups

et al. 2001

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“…Standard varieties sometimes changed over time but were consistent for all trials conducted in a region. Yields for two-row and six-row barley varieties were determined separately, as significant differences in yield could be expected (Jui et al 1997).…”

Section: Barleymentioning

confidence: 99%

Potential impacts of climate change on corn, soybeans and barley yields in Atlantic Canada

Bootsma¹,

Gameda²,

McKenney³

2005

Can. J. Soil. Sci.

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. 2005. Potential impacts of climate change on corn, soybeans and barley yields in Atlantic Canada. Can. J. Plant Sci. 85: [345][346][347][348][349][350][351][352][353][354][355][356][357]. In this paper, relationships between agroclimatic indices and average yields of grain corn (Zea mays L.), soybeans (Glycine max L. Merr.) and barley (Hordeum vulgare L.) in field trials conducted in eastern Canada are explored and then used to estimate potential impacts of climate change scenarios on anticipated average yields and total production of these commodities for the Atlantic region for the 2040 to 2069 period. Average yields of grain corn and soybeans were highly correlated (R 2 = 0.86 and 0.74, respectively) with average available crop heat units (CHU), with yields increasing by about 0.006 t ha -1 CHU -1 for corn and 0.0013 t ha -1 CHU -1 for soybeans. The explained variance was not improved significantly when water deficit (DEFICIT) was included as an independent variable in regression. Correlations between average yields of barley and effective growing degree-days (EGDD) were low (R 2 ≤ 0.26) and negative, i.e., there was a tendency for slightly lower yields at higher EGDD values. Including a second-order polynomial for DEFICIT in the regression increased the R 2 to ≥ 0.58, indicating a tendency for lower barley yields in areas with high water deficits and with water surpluses. Based on a range of available heat units projected by multiple General Circulation Model (GCM) experiments, average yields achievable in field trials could increase by about 2.6 to 7.5 t ha -1 (40 to 115%) for corn, and by 0.6 to 1.5 t ha -1 (21 to 50%) for soybeans by 2040 to 2069, not including the direct effect of increased atmospheric CO 2 concentrations, advances in plant breeding and crop production practices or changes in impacts of weeds, insects and diseases on yield. Anticipated reductions in barley yields are likely to be more than offset by the direct effect of increased CO 2 concentrations. As a result of changes in potential yields, there will likely be significant shifts away from production of barley to high-energy and high-protein crops (corn and soybeans) that are better adapted to the warmer climate. However, barley and other small grain cereals will likely remain as important crops as they are very suited for rotation with potatoes. There is a need to evaluate the potential environmental impacts of these possible shifts in crop production, particularly with respect to soil erosion in the region. L'inclusion du déficit hydrique comme variable indépendante à l'analyse de régression n'améliore pas la variance expliquée de manière significative. Le rendement moyen de l'orge est peu corrélé (R 2 _ 0,26) et de manière négative avec le nombre de degrés-jours de croissance (DJC), à savoir le rendement diminue légèrement quand le nombre de DJC augmente. L'inclusion d'un polynôme du deuxième degré pour le déficit hydrique à l'analyse de régression augmente la valeur R 2 à ≥ 0,58, signe que le rendement de l'orge a tendance à êtr...

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“…Moreover, DH lines have been used for determining genetic linkages and/or pleiotropy between marker genes and quantitative traits . The effect of spike type, which is controlled by a single gene, vrs1, (Vrs1Vrs1 for two-row type), on agronomic traits, chemical composition, and disease resistance was previously studied (Jui et al 1997;Fre´geau-Reid et al 2001;Choo et al 2004). For net blotch resistance, one resistance gene was shown to be linked to the Vrs1Vrs1 genotype on chromosome 2 (Ho et al 1996).…”

mentioning

confidence: 99%

Genetic analysis of net blotch resistance in a two-row × six-row cross of barley, using doubled-haploid lines

Chérif¹,

Rezgui²,

Devaux³

et al. 2008

Can. J. Plant Sci.

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Cherif, M., Rezgui, S., Devaux, P. and Harrabi, M. 2008. Genetic analysis of net blotch resistance in a two-row six-row cross of barley, using doubled-haploid lines. Can. J. Plant Sci. 88: 257Á266. The effect of spike type on net blotch resistance is not fully understood in barley (Hordeum vulgare L.). A doubled-haploid barley population derived from a cross between a susceptible two-row (Roho) and a resistant six-row (line 90) genotypes was used to study the genetics of net blotch resistance and to determine the effect of spike type on net blotch resistance at the adult plant growth stage across three environments. Net blotch rating was evaluated using a mass disease index, area under the disease progress curve and the apparent infection rate. Partial resistance to Pyrenophora teres was observed in many DH lines and in the parental line 90 in the three environments. This result indicated that selecting for partial resistance is feasible under severe net blotch conditions where differential responses among DH lines were noted as in Mograne in 2003Á2004. The normality test and/ or the means comparison method suggested that additive)additive epistasis effects influenced the expression of all disease parameters in the three environments. Both the coefficient of skewness and the number of transgressive lines indicate the presence of a complementary gene interaction for most disease parameters. Results showed that two-row lines were particularly associated with net blotch resistance in Mograne 2002Á2003 and in Tunis greenhouse 2004. A strategy for improving the level of quantitative resistance to P. teres in later generations is recommended. Cherif, M., Rezgui, S., Devaux, P. et Harrabi, M. 2008. Genetic analysis of net blotch resistance in a two-row six-row cross of barley, using doubled-haploid lines. Can. J. Plant Sci. 88: 257Á266. L'effet du nombre de rangs de l'e´pie´pi sur la re´sistancere´sistance de l'orge (Hordeum vulgare L.) a` la rayure re´ticuleére´ticuleé est mal compris. Une population haploı¨dehaploı¨de doubleé issue d'un croisement entre un cultivar a` deux rangs sensible (Roho) et une ligneé locale a` six rangs re´sistantere´sistante (ligneé 90) a e´teútiliseée´teútiliseé pour e´tudiere´tudier la ge´ne´tiquege´ne´ge´ne´tique de la re´sistancere´sistance et pour de´terminerde´terminer l'effet du nombre de rangs de l'e´pie´pi sur la re´sistancere´sistance a` la rayure re´ticuleére´ticuleé au stade adulte dans trois environnements. La reáction a` la rayure re´ticuleére´ticuleé a e´teé´valueée´teé´e´teé´valueé moyennant l'indice d'attaque, la surface au-dessous de la courbe d'e´volutione´volution de la maladie et le taux d'infection apparent. De nombreuses ligneés haploı¨dehaploı¨de-doubleés ainsi que la ligneé 90 ont manifesteúne re´sistancere´sistance quantitative a` Pyrenophora teres dans les trois environnements. Cette e´tudee´tude indique que la seíection pour la re´sistancere´sistance partielle a` la rayure re´ticuleére´ticuleé serait plus facile en conditions de forte e´pide´miee´pide´e´pide´mie,o...

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Genetic analysis of a two-row × six-row cross of barley using doubled-haploid lines

Cited by 40 publications

References 10 publications

QTL analysis of agronomic traits in barley based on the doubled haploid progeny of two elite North American varieties representing different germplasm groups

QTL analysis of agronomic traits in barley based on the doubled haploid progeny of two elite North American varieties representing different germplasm groups

Potential impacts of climate change on corn, soybeans and barley yields in Atlantic Canada

Genetic analysis of net blotch resistance in a two-row × six-row cross of barley, using doubled-haploid lines

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