Simple deterministic modeling can guide the design of breeding pipelines for self‐pollinated crops

Atlin, G. N.; Econopouly, Bethany F.

doi:10.1002/csc2.20684

Cited by 11 publications

(12 citation statements)

References 41 publications

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“…BRRI’s breeding programs are being reorganized and accelerated based on optimization strategies derived from application of the breeder’s equation to breeding pipeline design (Cobb et al 2019 ; Atlin and Econopouly 2022 ). In recent years, BRRI’s project “Transforming Rice Breeding” reshaped the breeding programs to shorten the breeding cycle time, increase selection accuracy and intensity, and improve selection for breeding value.…”

Section: Discussionmentioning

confidence: 99%

50 years of rice breeding in Bangladesh: genetic yield trends

et al. 2023

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To assess the efficiency of genetic improvement programs, it is essential to assess the genetic trend in long-term data. The present study estimates the genetic trends for grain yield of rice varieties released between 1970 and 2020 by the Bangladesh Rice Research Institute. The yield of the varieties was assessed from 2001–2002 to 2020–2021 in multi-locations trials. In such a series of trials, yield may increase over time due to (i) genetic improvement (genetic trend) and (ii) improved management or favorable climate change (agronomic/non-genetic trend). In both the winter and monsoon seasons, we observed positive genetic and non-genetic trends. The annual genetic trend for grain yield in both winter and monsoon rice varieties was 0.01 t ha−1, while the non-genetic trend for both seasons was 0.02 t ha−1, corresponding to yearly genetic gains of 0.28% and 0.18% in winter and monsoon seasons, respectively. The overall percentage yield change from 1970 until 2020 for winter rice was 40.96%, of which 13.91% was genetic trend and 27.05% was non-genetic. For the monsoon season, the overall percentage change from 1973 until 2020 was 38.39%, of which genetic and non-genetic increases were 8.36% and 30.03%, respectively. Overall, the contribution of non-genetic trend is larger than genetic trend both for winter and monsoon seasons. These results suggest that limited progress has been made in improving yield in Bangladeshi rice breeding programs over the last 50 years. Breeding programs need to be modernized to deliver sufficient genetic gains in the future to sustain Bangladeshi food security.

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Section: Discussionmentioning

confidence: 99%

50 years of rice breeding in Bangladesh: genetic yield trends

et al. 2023

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“…In this case, the drawbacks involve the differences in the selection intensities used in each situation and the experimental details in the evaluation of progenies (Hallauer et al., 2010). The third alternative, more versatile than the others, would be to use the GS, also called the breeder's equation (Atlin & Econopouly, 2022; Cobb et al., 2019; Xu et al., 2017) to simulate the use of different strategies for conducting RS without considering the type of recombination. Thus, based on the GS estimate, predicting and choosing the best RS strategy for a given condition is possible.…”

Section: Discussionmentioning

confidence: 99%

“…Cobb et al (2019) discuss strategies for improving the selection process in autogamous plants. Additional comments in this regard were presented by Atlin and Econopouly (2022). However, in both cases, nothing was mentioned about recombination.…”

Section: Introductionmentioning

confidence: 97%

Strategies for the recurrent selection program in tobacco breeding for green leaf yield

Marques

Pádua

Berger³

et al. 2022

Crop Science

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In conducting a recurrent selection (RS) program in tobacco (Nicotiana tabacum L.), inbred and noninbred progenies as well as double‐haploid (DH) progenies can be used. There is also the possibility of recombining the selected progenies using half‐sib (HS) or full‐sib (FS) progenies. To choose the best RS strategy, the breeder's equation can be used. When using inbred progenies with an allelic frequency other than 50%, one of the genetic variance components is the genetic covariance between additive effects and homozygous dominance effects (D1). This component may present negative values and is part of the numerator in the equation for gain from selection (GS). Thus, the objective of this study was to estimate the genetic variance components in a tobacco population and compare the different strategies to conduct RS. From an RS population, HS, FS, and S1:2 inbred progenies were evaluated in different experiments. The dominance variance was null. In this condition, the estimate of D1 is not significant, meaning that D1 does not influence the GS in the RS program. With the obtained estimates, the GS was estimated for the seven different strategies for conducting the RS program. The use of DH lines in tobacco RS represents the best strategy. Other strategies allow expressive GS, such as the alternate use of inbred and FS progenies, for evaluation and FS progenies for recombination.

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“…The donor tillers were put into an Erlenmeyer flask containing tap water and were covered with PVC bags to protect the tillers from intensive evaporation under the pre-treatment. The donor tillers were cold pre-treated at 10 • C for three to seven days [25,42,43].…”

Section: Collection and Pre-treatment Of Donor Tillersmentioning

confidence: 99%

Improvement of Anther Culture to integrate Doubled Haploid Technology in Temperate Rice (Oryza sativa L.) Breeding

Lantos

Jancsó

Székely

et al. 2022

Plants

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Doubled haploid (DH) plant production, such as anther culture (AC), is an effective tool used in modern rice breeding programs. The improved efficient protocols applied can shorten the process of breeding. The effect of combinations of plant growth regulators (2.5 mg/L NAA, 1 mg/L 2,4-D and 0.5 mg/L kinetin; 2 mg/L 2,4-D and 0.5 mg/L BAP) in the induction medium were compared in AC for five rice breeding materials and combinations. Induction of calli ranged from 264.6 ± 67.07 to 468.8 ± 123.2 calli/100 anthers in AC of rice genotypes. Two basal media (MS and N6) and two combinations of growth regulators (1 mg/L NAA, 1 mg/L BAP and 1 mg/L kinetin; 1.5 mg/L BAP, 0.5 mg/L NAA and 0.5 mg/L kinetin) were used as regeneration media. The in vitro green plant production was the highest with the application of the N6NDK induction medium (NAA, 2,4-D and kinetin) and the MS-based regeneration medium (1 mg/L NAA, 1 mg/BAP and 1 mg/L kinetin) in anther culture of the ‘1009’ genotype (95.2 green plantlets/100 anthers). The mean of five genotypes was 24.48 green plantlets/100 anthers for the best treatment. Flow cytometric analyses conducted identified the microspore origin of the haploid calli produced in AC, while the uniformity of spontaneous DH plants was checked in the DH1 and DH2 generations. Spontaneous chromosome doubling ranged from 38.1% to 57.9% (mean 42.1%), depending on the breeding source. The generated and selected DH lines were tested in micro- and small-plot field experiments to identify promising lines for a pedigree breeding program. The improved AC method was integrated in a Hungarian temperate rice pedigree breeding program.

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Simple deterministic modeling can guide the design of breeding pipelines for self‐pollinated crops

Cited by 11 publications

References 41 publications

50 years of rice breeding in Bangladesh: genetic yield trends

50 years of rice breeding in Bangladesh: genetic yield trends

Strategies for the recurrent selection program in tobacco breeding for green leaf yield

Improvement of Anther Culture to integrate Doubled Haploid Technology in Temperate Rice (Oryza sativa L.) Breeding

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