Inbreeding depression in maize
WebJul 18, 2024 · In comparison, the yield increment in maize is substantial with 2% per year since the extensive adoption of single cross hybrid in the 1960s (Duvick 1992). In alfalfa, genomic complexity, high inbreeding depression, and self-incompatibility complicate breeding procedure for higher production. ... Marker-assisted natural selection by … 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 ...
Inbreeding depression in maize
Did you know?
WebInbreeding depression is usually studied in organisms that can self-fertilize, such as self-compatible plants or hermaphrodite animals, because here intense inbreeding has the … http://xmpp.3m.com/inbreeding+research+paper
WebThis book describes the historical importance of potato (Solanum tuberosum L.),potato genetic resources and stocks (including S. tuberosum group Phureja DM1-3 516 R44, a unique doubled monoploid homozygous line) used for potato genome sequencing 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 …
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... 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 …
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.
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. fish and chips new farmWebJul 1, 2005 · Environment-dependent inbreeding depression has important, often neglected, ecological and evolutionary consequences: it can influence the demography of marginal or colonizing populations and alter adaptive optima of mating systems, dispersal, and their associated traits. 124 Highly Influenced PDF View 4 excerpts, cites background camsizer p4WebMar 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... camsizer xt retschWebRate of inbreeding depression for yield by selfing was b 1 = --46.53 q/ha and by full-sibbing, b L = --45.11 q/ha. At comparable levels of homozygosity, means of the lines developed by … cams kerryWebFeb 24, 2024 · Inbreeding depression is thought to result biologically from (a) deleterious recessive alleles driven to homozygosity, (b) ... Maize hybrids usually show more … cams in portland oregonWebAbstract. Self-fertilization (also known as selfing) is an important reproductive strategy in plants and a widely applied tool for plant genetics and plant breeding. Selfing can lead to inbreeding depression by uncovering recessive deleterious variants, unless these variants are purged by selection. Here we investigated the dynamics of purging ... cams in tampa flWebDec 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. camsion srl