Broad-sense heritability and genetic gain for powdery mildew resistance in multiple pseudo-F2 populations of flowering dogwoods (Cornus florida L.)

Parikh, Lipi; Mmbaga, Margaret T.; Kodati, Srikanth; Blair, Matthew W.; Hui, Dafeng; Meru, Geoffrey

doi:10.1016/j.scienta.2016.09.038

Cited by 6 publications

(6 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These characters may therefore be suggested as good criteria in selecting genotypes for yield improvement in the C. tinctorius × C. palaestinus (TP) and C. oxyacanthus × C. palaestinus (OP) crosses especially at early generation. Estimation of genetic gain is important to predict performance of progenies derived from particular crosses (Parikh et al, 2016). In this study, higher values of response to selection in TP and OP progenies at water stress conditions suggested that phenological and yield components are important traits to achieve genetic gain in safflower breeding programs.…”

Section: Discussionmentioning

confidence: 99%

The Use of Wild Relatives of Safflower to Increase Genetic Diversity for Fatty Acid Composition and Drought Tolerance

Shafiei-Koij¹,

Majidi²,

Mirlohi³

et al. 2019

Crop Science

View full text Add to dashboard Cite

Wild relatives of safflower (Carthamus tinctorius L.) may contribute genes to improve cultivated species under water stress conditions. This study was conducted to increase genetic diversity of safflower for agromorphological traits and fatty acid profiles using interspecific hybridization. Three species—C. tinctorius, C. palaestinus Eig., and C. oxyacanthus M. Bieb.—were used to develop three segregating populations of C. tinctorius × C. palaestinus (TP), C. oxyacanthus × C. palaestinus (OP), and C. oxyacanthus × C. palaestinus (TO). Seventy‐three lines, along with the three parental species, were evaluated for agromorphological traits under water stress and nonstress conditions in F3 and F4 generations during 2 yr. Fatty acid analysis of interspecific progenies showed occurrence of transgressive segregation. The results showed that mean values of seed yield for TP and TO progenies, where C. tinctorius was one of their parents, were higher than mean value of seed yield for OP that derived from the two wild species. High genetic variation was observed for seed yield, capitulum diameter, and phenological traits in interspecific populations under both moisture conditions. Indirect selection for flowering and seed yield components under water deficit conditions was most efficient to improve seed yield. Results indicated that gene introgression from wild relatives of safflower into the cultivated gene pool increased genetic variation for the measured traits and allowed identifying superior genotypes for future breeding programs.

show abstract

Section: Discussionmentioning

confidence: 99%

The Use of Wild Relatives of Safflower to Increase Genetic Diversity for Fatty Acid Composition and Drought Tolerance

Shafiei-Koij¹,

Majidi²,

Mirlohi³

et al. 2019

Crop Science

View full text Add to dashboard Cite

show abstract

“…As stated by Banerjee et al (2012) and Parikh et al (2016), F 1 plants resulting from crossings between parents highly heterozygote at many loci is considered as pseudo-F 2 and not as F 1 plants. The strategy of pseudo-F 2 plants was applied by Banerjee et al (2012), in Cornus florida; by Parikh et al (2016), in Morus spp. ; and by Arriel et al (2016)…”

Section: Introductionmentioning

confidence: 99%

Inheritance of resistance to dieback disease in mango (Mangifera indica)

Coelho¹,

Santos²,

Batista³

2018

Aust J Crop Sci

View full text Add to dashboard Cite

The fungi Lasiodiplodia theobromae and Neofusicoccum parvum are pathogens responsible for causing dieback disease in mangoes. Studies on the inheritance of resistance to these fungal diseases in mango are quite limited. The objective of the present study was to evaluate the inheritance of resistance to dieback disease in three pseudo-F 2 progenies to assist in mango breeding programs. Young branches containing young leaves were selected, and suspension of 10 3 conidia/mL of L. theobromae or N. parvum was sprayed separately. After inoculation, leaves were protected in a plastic wet chamber for 48 hours. The infection was estimated by taking the branches without symptoms/total number of inoculated branches. Plants without disease symptoms in more than 90% of the branches, in three different inoculation periods, were considered as resistant. Keitt, Haden, and Espada cultivars were resistant to both fungi, while 'Tommy Atkins' was susceptible to both pathogens. Monogenic resistance, conferred by recessive alleles, was observed for L. theobromae for the three crossings evaluated, despite the 13:3 segregation detected for 'Keitt' x 'Tommy Atkins'. For N. parvum, recessive resistance with 3:1 monogenic segregation was observed in the crossing 'Keitt' x 'Tommy Atkins', and 9:7 epistatic segregation was reported in the crossing 'Haden' x 'Tommy Atkins' and 'Espada x 'Tommy Atkins'. The mono or digenic inheritance observed in the present study indicates the possibility of selection in the F 2 generation and identification of plants with double resistance to L. theobromae and N. parvum in mango trees.

show abstract

“…Broad sense heritability (H 2 ) was measured using analysis of variance component method (Fehr 1987). H 2 = σ 2 g / σ 2 p ; where, σ 2 g = genetic variance (additive, dominance, and epistatic) and σ 2 p = phenotypic variance (Parikh et al 2016). Generation gain was calculated according to the formula Generation gain = (Indicator curr -Indicator base ) / Indicator base × 100 %, where Indicator curr , and Indicator base represent the mean indicator of the current and base generations, respectively.…”

Section: Discussionmentioning

confidence: 99%

Marker-assisted selection in C. oleifera hybrid population

et al. 2020

View full text Add to dashboard Cite

Marker-assisted selection (MAS) is implemented to improve Camellia oleifera yield and fruit attributes for meeting China’s increased demand for new varieties development. We conducted three-generational (G0, G1, and G2) hybridization (diallel mating) and selection experiment and used Sequence-Related Amplified Polymorphism (SRAP). SRAP markers to investigate their utility in a MAS framework. The utilized SRAP markers were instrumental in hybrid authenticity and the identification of matroclinal or patroclinal inheritance presence, thus guiding mating pair selection and direction (their role as male or females). Across the studied 3 generations, estimates of genetic diversity parameters showed steady increase with percentage increase of ((G0 to G1 and G1 to G2) 9.25 and 9.05: observed number of alleles; 3.12 and 7.80: means effective number of alleles; 12.35 and 22.34: Nei‘s gene diversity; and 14.21 and 21.77: Shannon‘s index), indicating lack of diversity reduction associated with selection. Estimates of genetic distance and their correlation with heterosis were useful in guiding selection of mating pairs for achieving the desired yield and fruit attributes (fruit diameter, height, weight, and index, peel thickness, number of seeds per fruit, seed weight per fruit, and seed rate). Most yield and fruit attributes exhibited high broad-sense heritability with increasing trend over generation intervals, indicating the increased potential of hybrid breeding for this species.

show abstract

Broad-sense heritability and genetic gain for powdery mildew resistance in multiple pseudo-F2 populations of flowering dogwoods (Cornus florida L.)

Cited by 6 publications

References 30 publications

The Use of Wild Relatives of Safflower to Increase Genetic Diversity for Fatty Acid Composition and Drought Tolerance

The Use of Wild Relatives of Safflower to Increase Genetic Diversity for Fatty Acid Composition and Drought Tolerance

Inheritance of resistance to dieback disease in mango (Mangifera indica)

Marker-assisted selection in C. oleifera hybrid population

Contact Info

Product

Resources

About