Phenotypic variation and heritability of heading date in hexaploid oat

Mazurkievicz, Gustavo; Ubert, Itacir de Pierri; Krause, Felipe Augusto; Nava, Itamar Cristiano

doi:10.1590/1984-70332019v19n4a61

Cited by 9 publications

(9 citation statements)

References 16 publications

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“…A review conducted by Sorrells and Simmons (1992) of North American cultivated oat cultivars showed that flowering was normal with photoperiods of >11 h for cultivars with different levels of photoperiod sensitivity. Additionally, with between 18 and 24 h of light, the length of the cycle is more affected by the temperature than the photoperiod duration (Bleken & Skjelvåg, 1986; Wiggans & Frey, 1955), indicating a close relationship between temperature and photoperiod in plant growth and development (Bleken & Skjelvåg, 1986; Garner & Allard, 1920; Mazurkievicz, Ubert, Krause, & Nava, 2019). A wide range of variation in flowering date has been reported in oat, with most of the early‐maturing cultivars being insensitive to temperature and photoperiod, whereas late‐maturing cultivars were sensitive to temperature and photoperiod (Koshkin, Loskutov, Smirnova, & Matvienko, 2009).…”

Section: Discussionmentioning

confidence: 99%

Speed breeding and early panicle harvest accelerates oat (Avena sativa L.) breeding cycles

et al. 2020

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Increasing the response to selection in plant breeding programs by reducing the time required to complete a generation of inbreeding can significantly shorten the time to release a cultivar. Recently, ‘speed breeding’ strategies that manage temperature, photoperiod, and micronutrients showed a significant reduction in time to inbreeding in several crops. The goal of this study was to determine if the speed breeding system can be effectively applied to oat (Avena sativa L.) for a single‐seed descent breeding scheme and to determine if seeds can be harvested early with acceptable germination for breeding purposes. Two systems were evaluated using eight genetically diverse oat genotypes under speed breeding (22‐h photoperiod) and normal growing conditions (16 h) in a randomized complete block design with a factorial arrangement of treatments and three replications. Our results indicated a significant reduction in time for all the phenological stages evaluated when speed breeding was used, compared with normal growing conditions. In particular, the reduction in time to flowering date was 11 d (62 vs. 51 d on average). Germination evaluations indicated that by 21 d after flowering, it was possible to obtain acceptable germination levels for all genotypes evaluated. This should be of great importance in breeding systems where single‐seed descent can be used.

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Section: Discussionmentioning

confidence: 99%

Speed breeding and early panicle harvest accelerates oat (Avena sativa L.) breeding cycles

et al. 2020

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“…Studying two hulled by naked oat mapping populations, Zimmer et al (2018) observed a phenotypic variation ranging from 70 to 103 days to heading date between recombinant inbred lines, varying according with planting date and mapping population. Characterizing heading date of 563 F 2 individuals from a southern-by-spring oat population, Mazurkievicz et al (2019) identified a phenotypic variation ranging from 79 to 132 days. In this sense, the wider phenotypic variation of the UFRGS Oat Panel, associated to a large set of markers, detected important genomic regions associated to heading date.…”

Section: Discussionmentioning

confidence: 99%

Genome–wide association mapping for heading date in oats under subtropical environments

Zimmer

Oliveira

Arruda

et al. 2022

Sci. agric. (Piracicaba, Braz.)

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Selection for heading date has been a decisive factor to increase areas cropped with oats in Brazil. Although important to oat breeders, genomic regions controlling heading date have not been completely identified. The objective of this study was to identify genomic regions controlling oat heading date in subtropical environments. A set of 412 oat genotypes, developed from 1974 to 2015, was assessed for heading date in contrasting environments and genotyped using genotyping-by-sequencing (GBS). Phenotypic and genotypic data were used in single and multi-environment association models. Quantitative trait loci (QTL) associated to heading date were identified on oat consensus groups Mrg02, Mrg05, Mrg06, Mrg12, and Mrg21. Some of the findings confirmed the association of genomic regions with heading date, while others emerge as new candidate regions associated to the trait. The genomic regions identified on Mrg02 and Mrg12 were associated to Vernalization 3 (Vrn3), while the genomic region identified on Mrg21 is associated with Vernalization 1 (Vrn1). The Vrn1 region was detected in Londrina, an environment with reduced vernalization condition, and in the multi-environment model. The results reveal that some genotypes of the panel are responsive to vernalization, increasing the days to heading without this environmental stimulus. Our results provide important contribution for a better understanding of heading date in subtropical environments and a strong basis for marker-assisted selection in oats.

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“…Heritability and phenotypic variance along with the selection intensity can give the most accurate estimate of genetic advance for effective selection (Parvin et al, 2020). High heritability along with high genetic advance for a particular trait indicated most effective selection condition (Bibi et al, 2016;Rahim, 2018 andMazurkievicz et al, 2019). For developing a high yielding variety, it is very important to estimate the individual role of different morphological traits on higher yield (Ejaz-Ul-Hasan et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Variability and heritability study in some selected Brassica rapa L. genotypes

Shelly,

Bhuiyan,

Mahmud

et al. 2023

Bangladesh J. Agri.

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A field experiment was conducted in the research field of Sher-e-Bangla Agricultural University (SAU), Dhaka, Bangladesh to study variability and heritability in Brassica rapa L. for developing short durable, high yielding varieties. The experiment had laid out in a randomized complete block design with three replications and consisted of seven genotypes viz., G1 (BARI Sarisha-14), G2 (Brown Special), G3 (Yellow Special), G4 (Tori-7), G5 (BARI Sarisha-17), G6 (BARI Sarisha-15) and G7 (BARI Sarisha-6). The result revealed that G7 had the highest yield plant-1 (6.91 g) and longest duration (108.00 days) while G4 had the lowest yield plant-1 (4.12 g) and G2 had the shortest duration (79.33 days). High genotypic and phenotypic coefficient of variation for number of secondary branches plant-1 (95.35% and 99.39%), number of siliqua plant-1 (29.52% and 30.23%), plant height (25.19% and 25.38%) and number of seeds siliqua-1 (26.76% and 27.12%) had estimated. High heritability with high genetic advance and gain had observed for days to 80% maturity (99.92%, 20.99% and 23.36 %), plant height (98.55%, 53.99% and 51.53%) and number of siliqua plant-1 (95.33%, 101.25% and 59.37%). While high heritability with low genetic advance and high genetic gain were observed for number of primary branches plant-1 (92.02%, 0.70% and 188.43%), number of secondary branches plant-1 (92.02%, 7.47% and 188.43%), length of siliqua (98.23%, 1.104% and 29.96), 1000 seed weight (84.61%, 1.23% and 32.01%) and yield plant-1 (97.41%, 2.01% and 38.47%). Days to 80% maturity, plant height and number of siliqua plant-1 showed high heritability with high genetic advance and genetic gain indicated additive gene action and selection could be useful for these traits. While high heritability with low genetic advance had observed for number of primary and secondary branches plant-1, length of siliqua, 1000 seed weight and yield plant-1 indicated non additive gene action and selection might be ineffective for these traits. Bangladesh J. Agri. 2023, 48(2): 106-118

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Phenotypic variation and heritability of heading date in hexaploid oat

Cited by 9 publications

References 16 publications

Speed breeding and early panicle harvest accelerates oat (Avena sativa L.) breeding cycles

Speed breeding and early panicle harvest accelerates oat (Avena sativa L.) breeding cycles

Genome–wide association mapping for heading date in oats under subtropical environments

Variability and heritability study in some selected Brassica rapa L. genotypes

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