Inbreeding depression in maize

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August undefined, 2024

WebSep 23, 2016 · Inbreeding depression in single, three way and double-cross hybrids of maize Currently, one of the acclaimed alternatives for increasing maize yield is accomplished through utilization of heterosis in hybrid cultivars. However, upon performing crosses between related pairs, there are losses due to inbreeding depression. WebSep 13, 2024 · This paper reviewed past research efforts at characterizing heterotic response among tropical maize genetic materials with a view to point out merits and demerits in the methods used and future direction towards achieving sustainable hybrid cultivation and enhancing food security in the sub-region. Keywords combining ability …

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http://xmpp.3m.com/inbreeding+research+paper WebInbreeding depression for seed set was small, suggesting seed set may not be the limiting factor in maintaining autotetraploid maize inbred lines that it is in other autotetraploid species. Inbreeding depression for yield corresponded to that expected based on the coefficient of inbreeding assuming the completely inbred generation has a mean of ... graphicsgale rpg maker

Inbreeding Depression SpringerLink

WebInbreeding depression seems to be present in most groups of organisms, but varies across mating systems. Hermaphroditic species often exhibit lower degrees of inbreeding … WebNov 30, 2024 · The opposite effect, inbreeding depression, results from repeated self-pollination and leads to a reduction in vigor. A popular explanation for this reaction is the … WebMating between closely related individuals can result in inbreeding depression, a loss of fitness ( Charlesworth and Charlesworth 1987) that can affect endangered or isolated species ( Kardos et al. 2016) and lead to the eventual extinction of small populations ( Hedrick and Garcia-Dorado 2016 ). chiropractor iowa falls ia

Slow Recovery from Inbreeding Depression Generated by the …

WebDec 1, 2024 · Therefore, IMPH is a function of inbreeding depression, genetic divergence, and dominance whereas panmictic-midparent heterosis is a function only of genetic divergence and dominance (Lamkey and Edwards 1999). In maize, heterosis is exploited by creating single-cross hybrids from two genetically distinct heterotic pools. WebDec 1, 2015 · Development of S1 inbred lines and estimation of inbreeding depression in two maize (Zea mays L.) populations. Abstract To know the effect of inbreeding depression, this study was conducted... chiropractor ioniaWebOct 3, 2024 · The present study aimed to obtain estimates of inbreeding depression for eight traits in seven tropical maize populations, analyze the effects of inbreeding over … chiropractor in york ne

"WebUnsourced material may be challenged and removed. Plant breeding in Nepal is the art and science of improving the heredity of plants for benefit of humanity in Nepal. The major crops of Nepal include rice, wheat, maize, oil seeds and grain legumes. " - Inbreeding depression in maize

Inbreeding depression in maize

Phenomenon of inbreeding depression on maize in perspective of …

WebJan 17, 2024 · Inbreeding depression and heterosis in maize was initially documented by George H. Shull and Edward M. East [4–6]. The adoption of hybrid maize over open-pollinated varieties occurred remarkably fast due to improved yields, greater uniformity for machine harvesting, and increased durability under extreme abiotic stress. ... WebNov 28, 2016 · Even though inbreeding depression is severe in perennial ryegrass DHs, reports of vigorous and fertile plants do exist . In the early days of maize [ 124 ] and rye hybrid breeding [ 125 ], both allogamous cereals suffered from inbreeding depression as well, and selection among inbred lines was successfully used to improve their vigour and ...

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WebInbreeding depression is widespread across plant and animal kingdoms and may arise from the exposure of deleterious alleles and/or loss of overdominant alleles resulting from increased homozygosity, but these genetic models cannot fully explain the … http://xmpp.3m.com/inbreeding+research+paper

WebJul 11, 2012 · Abstract. Inbreeding depression (i.e. negative fitness effects of inbreeding) is central in evolutionary biology, affecting numerous aspects of population dynamics and demography, such as the evolution of mating systems, dispersal behaviour and the genetics of quantitative traits. Inbreeding depression is commonly observed in animals and plants.

WebMar 1, 2024 · Rajendra Agricultural University Abstract The present investigation was carried out for studying heterosis and inbreeding depression of twenty eight hybrids (F1 ʼ s) and their F2 ʼ s made by... WebNov 30, 2024 · Materials and Methods. The experiments to investigate inbreeding depression rates in diploid and tetraploid maize lines were conducted in 2009 (Supplementary Material 1) and 2008 (Supplementary Material 2) in Columbia, Missouri.The four diploid and tetraploid parental inbred maize lines A188 (2x, 4x), Oh43 (2x, 4x), B73 …

WebSep 2, 2024 · These results suggest a mixture of mostly polygenic, smalleffect recessive variation underlying inbreeding depression, with an additional contribution from rare …

WebApr 7, 2024 · Inbreeding Depression Dr. Kaushik Kumar Panigrahi Follow Assistant Professor-Cum-Junior Scientist at Orissa University of Agriculture and Technology Advertisement Advertisement Recommended Inbreeding & Inbreeding depression in Plants Tulshiram Rathod 22.3k views • 16 slides Presentation on Heterosis Dr. Kaushik Kumar … graphicsgale dark themeWebInbreeding depression is usually studied in organisms that can self-fertilize, such as self-compatible plants or hermaphrodite animals, because here intense inbreeding has the … graphicsgale sprayerWebAug 27, 2024 · Inbreeding depression is widespread across plant and animal kingdoms and may arise from the exposure of deleterious alleles and/or loss of overdominant alleles … chiropractor iowa park txWebSep 2, 2024 · Inbreeding depression was greater in maize than teosinte for 15 of 18 traits, congruent with the greater segregating genetic load predicted from sequence data in the maize population. For many traits - and more commonly in maize - genetic variation among selffertilized families was less than expected based on additive and dominance variance ... graphicsgale sprite sheetWebIn order to verify the genetic and agronomic value, yield potential and inbreeding depression of synthesized composites, as well as quantifying the population variability and incorporating new sources of semiexotic germplasm in maize genetic improvement programs, four populations, identified as NAP-FA x HG-71 (P1), NAP-FL x HG-49 (P2), NAP … graphicsgale pixel artWebInbreeding depression also occurs in wild species in natural habitats, and its impacts are typically more severe than in captivity. For example, inbreeding depression was detected in 90% of 157 data sets from a broad array of animal and plant taxa in natural environments, and the average impact was seven-fold greater than in captivity. graphicsgale save as progressiveWebmost families the inbreeding depression seemed to coincide with a curve calculated on the basis of the expected loss of heterozygosity in a diploid organism. ... The success of hybridization between inbred lines in maize has led to many similar investigations with other crops. Several workers have reported inbreeding studies in cultivated ... chiropractor iowa falls