Genetic models and their predictive value

Hill, J.; Becker, Heiko C.; Tigerstedt, P. M. A.

doi:10.1007/978-94-011-5830-5_2

Cited by 2 publications

(1 citation statement)

References 41 publications

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“…In addition, the fruit color expression of backcross populations (BCP 1 and BCP 2 ) did not fit the specific ratio for a single gene and the difference between BCP 1 and BCP 2 (74.2) was close to half the parental difference (86.5), which matched the description of Hill et al (1998): the difference between BCP 1 and BCP 2 should be approximately half the parental difference when epistasis is absent. The RHS score of the F 2 population was 5.8 which was close to half of the difference between F 1 and the mid-parent (mean of two parents) that indicated the dominance effect was present (Hill et al, 1998). The chlorophyll a, chlorophyll b, and total chlorophyll concentrations of the F 2 population also showed continuous changes (data not shown).…”

Section: Fruit Color Classification and Chlorophyll Concentrations Anmentioning

confidence: 83%

Genetic Research on Fruit Color Traits of the Bitter Gourd (<i>Momordica charantia</i> L.)

Huang¹,

Hsieh²

2017

Hortic J

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The objective of this study was to determine the genetic model of fruit color in the bitter gourd (Momordica charantia L.). Six generations (P 1 , P 2 , F 1 , F 2 , BCP 1 , and BCP 2 ) in the hybrid set "MS 41 × MS 47" were used to estimate the genetic effects via generation mean analysis (GMA). The fruit color of the F 1 population was green implying the green color was dominant over the white color. The fruit color of the F 2 population showed a continuous distribution from white to dark green indicating this trait was controlled by quantitative genes. Genetic analyses using the Royal Horticultural Society scoring system (RHS score) fitted the three parameters model (χ 2 3 = 1.59, P = 0.6607) and showed significant to highly significant additive and dominance effects, respectively. The GMA results of the six parameters model revealed a significant additive effect on chlorophyll b concentration. Chlorophyll a and total chlorophyll concentrations were nonsignificant in all parameters. The magnitudes of additive and additive × additive gene effects were larger than those of the dominance and dominance × dominance gene effects, which revealed that additive genes were more important in the contribution to chlorophyll concentrations. Broad-sense heritability estimates for color traits were 0.39, 0.611, 0.470, and 0.460 for concentrations of chlorophyll a, chlorophyll b, total chlorophyll, and RHS score, respectively. In contrast to previous findings, with the GMA analysis we believe that the genetic model of fruit color in bitter gourd is clearly a quantitative model.

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Section: Fruit Color Classification and Chlorophyll Concentrations Anmentioning

confidence: 83%

Genetic Research on Fruit Color Traits of the Bitter Gourd (<i>Momordica charantia</i> L.)

Huang¹,

Hsieh²

2017

Hortic J

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Commercial generations of Brassica napus cause greater yield loss in Triticum aestivum, than volunteer B. napus generations

Seerey¹,

Shirtliffe²

2010

Can. J. Plant Sci.

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Seerey, N. J. and Shirtliffe, S. J. 2010. Commercial generations of Brassica napus cause greater yield loss in Triticum aestivum, than volunteer B. napus generations. Can. J. Plant Sci. 90: 777Á783. Volunteer canola (Brassica napus L.) has become a common weed in producer fields, due to the large area cropped, and inherent harvest losses. Commonly grown B. napus varieties which segregate in subsequent generations to create volunteers with unknown competitive capabilities are developed by hybrid genetics. The objective of this study was to evaluate the effect of volunteer B. napus variety and generation on competition yield loss in hard red spring wheat (Triticum aestivum L.). Two hybrid and one open-pollinated B. napus varieties with three consecutive generations produced from each variety were grown at varying densities in a wheat stand over 5 site-years. Yield loss depended on the density of B. napus in relation to total plant density. Generational differences in B. napus seedlings resulted in differences in wheat yield losses. Brassica napus densities at maturity provided a more robust model of wheat yield loss, as there were differences in wheat yield losses due to the interaction of generation and variety of B. napus. Commercial seed generations were the most competitive plants, while volunteer generations were less competitive. The amount of yield loss caused by volunteer B. napus was highly variable. The availability of low-priced herbicides, and the competitive ability of volunteer B. napus may allow for economic thresholds concerning weed control to be surpassed at low densities of volunteer B. napus populations.

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Genetic models and their predictive value

Cited by 2 publications

References 41 publications

Genetic Research on Fruit Color Traits of the Bitter Gourd (<i>Momordica charantia</i> L.)

Genetic Research on Fruit Color Traits of the Bitter Gourd (<i>Momordica charantia</i> L.)

Commercial generations of Brassica napus cause greater yield loss in Triticum aestivum, than volunteer B. napus generations

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