2). Acquaah [38] implicated maternal cytoplasmic effect for yield in plants. Though, RFLP- Sep 4, 2023 · High-quality reference genome assemblies, representative of global heterotic patterns, . · However, targeting heterotic group B male inbred lines being 5–8 days earlier flowering than heterotic group A inbred lines used to make single-cross females and vice versa during TWC hybrid identification will be a good strategy to minimize synchronization problems and maximize seed yield from production fields. Combining ability and heterosis relationship is more complex, the establishment of heterotic group might be more help to research heterosis. · The hybrids from heterotic groups, Reid × SPT, Reid × LRC, SPT × PA, and Lancaster × LRC, contributed highly significant positive SCA effects and strong heterosis … the same heterotic group and low correlation for line combinations from different heterotic groups of parental GDs with single crosses and their heterosis for grain yield. · The identification of single nucleotide polymorphisms (SNPs) can improve understanding of the genetic diversity of maize (Zea mays) inbred lines and their classification into heterotic groups . GCA had little value in clustering parents for predicting heterosis. (2009) used simple sequence repeat (SSR) markers as well as GY and pedigree information to classify 27 inbred lines into three heterotic groups, A, B, and C. The BCY is an important trait in baby corn cultivation; hence the same was selected for heterotic grouping. Introduction Cabbage ( Brassica oleracea L. In this study, two divergent heterotic groups, Shaan A and Shaan B, were cultivated through long-term artificial selection based on breeding … · In total fruit yield, the high positive BP and MP heterotic values recorded in the two crosses involving ‘Calypso’ as the mother plant (Pistillate parent), showed that ‘Calypso’ among others, had transferred traits for high yield to such hybrids.
e. For haplotype groups with the sum coverage depth greater than a given … · A novel method of using a heterotic group's specific and general combining ability (HSGCA) to assign maize (Zea mays L.) inbred lines into heterotic groups has been proposed objectives of this study were to (i) assign maize inbred lines to known heterotic groups using this method and (ii) compare efficiency of this method to … Sep 1, 2016 · The objectives of this study were to (i) evaluate combining ability of 25 improved exotic germplasm using different numbers of testers (1 to 3) from Suwan1, Reid, and non-Reid heterotic groups . NUGRAHA2, B.47 Mg ha-1, P < 0. WALUYO1, N.
Lung Fibroblasts. The development of … · were part of the same heterotic group (Table 3). pment of Heterotic Pools in Germplasm /Genetic stocks and Inbreds, their Improvement for Increasing Heterosis Submitted by: a RAD/2018-18 Ph. · The study was able to identify B- and R-lines as two separate broad heterotic groups in pearl millet and suggested four heterotic pools, two each of seed (B-lines) and restorer (R-lines) parents, which will help future pearl millet breeders not only in developing high yielding hybrids but also in the development of highly productive hybrid parents for … · The main objective of this study was to identify promising heterotic groups for future rice breeding programs. 121 carried out a genome-wide . Discover the world's research 25+ million members · Heterotic pattern investigations of the 628 loci show that numerous loci, mostly with complete–incomplete dominance (the major one) or overdominance effects .
근로 장려금 대학생 Key words Sep 1, 2016 · Combining ability estimates of lines to be used in breeding are useful for maize (Zea mays L. Analysis of variance of line-tester mating. Results. In this study, 269 temperate inbred lines, most of which are widely used in Chinese maize breeding programs, . · Hybrid breeding, which entails crossing of lines from two genetically distant germplasm collections—called heterotic groups (Melchinger and Gumber 1998)—has emerged as a prime strategy to meet demands for a sustainable intensification of agricultural production (Duvick 2005). Fifty-three of these SSRs were found to be the most discriminatory and will be used in future routine fingerprinting studies.
Heterosis, hybrid vigor, or outbreeding enhancement is the improved or increased function of any biological quality in a hybrid offspring. Time course imaging of two maize inbreds and their F1 hybrid (middle) exhibiting heterosis. · The difference of average shared-allele GD among within- and between-group matings (0. Agronomic. 2014) as it guides breeders in making planned crosses between inbred lines of different heterotic groups for the purpose of developing high yielding hybrids and … Sep 5, 2013 · An intermediate-to-late-maturing, large white-grained, semi-flint inbred line with adequate levels of resistance to TLB, GLS, and PLS. Here we assembled 1,604 historically utilized maize inbred lines belonging to various female heterotic groups (FHGs) and male heterotic groups (MHGs), and conducted … · Information on the general combining ability of inbred lines and the specific combining ability of hybrid combinations is crucial for successful hybrid development. Determination of Heterotic Groups and Heterosis Analysis of Yield Performance var. Meanwhile, MARB has the advantage of not requiring sophisticated transformation and double haploid (DH) technologies over RNA interference (RNAi) … · Genomic selection (GS) is one of the most powerful tools available for maize breeding. This study was carried out to (a) identify the most efficient heterotic grouping method for classifying a set of inbred lines and (b) … · Different heterotic grouping methods has been used by different researchers. One gauge group is SO(32) (the HO string) while the other is E 8 × E 8 (the HE string). The heterotic groupings among the 16 … This study showed that the average heterosis of heterotic groups based on RAPD markers is much higher than that of heterotic groups based on yield components and GCA of these traits. · However, because these groups are not well defined and were derived from broad-based populations, there is often as much heterosis among lines within A or B groups as there is between A and B lines (Reif et al.
var. Meanwhile, MARB has the advantage of not requiring sophisticated transformation and double haploid (DH) technologies over RNA interference (RNAi) … · Genomic selection (GS) is one of the most powerful tools available for maize breeding. This study was carried out to (a) identify the most efficient heterotic grouping method for classifying a set of inbred lines and (b) … · Different heterotic grouping methods has been used by different researchers. One gauge group is SO(32) (the HO string) while the other is E 8 × E 8 (the HE string). The heterotic groupings among the 16 … This study showed that the average heterosis of heterotic groups based on RAPD markers is much higher than that of heterotic groups based on yield components and GCA of these traits. · However, because these groups are not well defined and were derived from broad-based populations, there is often as much heterosis among lines within A or B groups as there is between A and B lines (Reif et al.
Concept of Heterotic Group and its Exploitation in Hybrid
Consultation of published pedigrees [ 48 , 49 , 67 ] as well as previous publications on the subject as well as previous publications on the subject [ 12 , 20 , 24 ] confirm the accuracy of heterotic group … · Heterotic grouping plays an important role in hybrid breeding by avoiding the development and evaluation of unnecessary hybrids thus saving time and resources of the researcher. Proprietary inbreds developed by the private seed indus … · Heterotic groups are made up of genotypes that do well when mixed with genotypes from another heterotic group [19]. characters distinct from this group are expected for the geno-types CEP29 and ICA2 (group II), BR18 and TB951 (group III), · Heterotic group classification has a crucial impact on maize (Zea mays L. Using a line × tester mating design, 150 testcrosses were generated in Yunnan. … Sep 13, 2021 · A heterotic group has been defined as a collection of germplasm that, when crossed with germplasm from an external group, tends to exhibit a higher degree of … Sep 1, 2018 · Identifying groups with high SCA values is the main reason for heterotic group clustering. Surprisingly, most of the … · Thus, the heterotic groups inferred by different researchers are similar, especially for the four major groups, even though they were inferred by different markers in germplasm from different sources.
The creation of heterotic groups in maize is based on . Six plants from each of the 25 inbreds ( ♀) were pollinated with each tester ( ♂). The significant effects of GCA on a trait for the inbreds were standardized and subjected to Ward’s minimum variance cluster analysis (SAS Institute 2017 ). · Metrics Comparative and evolutionary genomics analyses for more than 1,600 re-sequenced maize lines identified vast amounts of differentially and complementary … · Although an advantageous QTL normally segregates in one heterotic group, the beneficial effect of the QTL is epistatically controlled by another QTL; this deleterious epistasis is diminished by the beneficial alleles contributed from another heterotic group, therefore resulting the expression of significant heterosis observed … · A heterotic group is a set of genetically related genotypes that show similar hybrid performance when crossed with individuals from another genetically distinct … · We review the degree of heterosis, history and current status of hybrid breeding, and development of heterotic groups in five major crops with different … · Heterotic groups are sets of genotypes having a comparable combining ability and heterotic response when crossed with a genetically distinct group of genotypes (Melchinger & Gumber, 1998). · Additionally, 155 inbred lines were separated into two groups, with seven subgroups, using 82 SSRs , and 367 diverse inbreds lines were divided into two heterotic groups, composed of six subgroups . However, little such information is available for Chinese cabbage.편의점 빌런
Shown are two heterotic groups that are improved by reciprocal recurrent selection, represented by the ‘Hybrid crosses’, which means that crosses between the groups are only made to evaluate the hybrid . However, the SNP data in the present study (Table 1 ; Figure 7 ) did not reveal clear population structure and genetic differentiation for most inbred lines in … Heterosis, hybrid vigor, or outbreeding enhancement is the improved or increased function of any biological quality in a hybrid offspring. See more. Sep 17, 2020 · Developing Heterotic Groups for Successful Hybrid Breeding in Perennial Ryegrass by Maximilian Vogt 1,2, Steven Yates 1, Timothy Sykes 1, Wilbert Luesink 3, Michael Koch 2 and Bruno Studer … Single-cross maize hybrids display superior heterosis and are produced from crossing two parental inbred lines belonging to genetically different heterotic groups. · The heterotic grouping agreed with genetic background information and heterotic group’s specific and general combining ability estimates. Extensive research has been focused on the TSPT × Reid heterotic pattern because it is one of the predominant heterotic patterns in northern China and has been … Sep 20, 2021 · Heterotic group theory is one of the fundamental concepts which allow the maximum exploitation of the available genetic diversity in maize.
, Indica × Japonica) have extensive ., 2008). · into Heterotic Group A or B according to their combin-CML342, CML343) (Fig. (2007, 2008) postulated that three heterotic groups (tri-heterotic group [TriHG]) in maize might be the most suitable number for improving both maize breeding effectiveness (missing fewer super hybrid) and efficiency or productivity (i. Generally, inter-group hybrids generated from genotypes of different heterotic groups are more vigorous than intra-group hybrids, which result from crosses within a heterotic group. The seven breeding populations clustered as would be predicted on the basis of pedigree and heterotic … · The stiff-stalk heterotic group in Maize (Zea mays L.
Our team proposed a "three heterotic group" pattern consisting of Suwan1xReid, Suwan1×nonReid, and ReidxnonReid, based on long-term breeding practice [31][32] [33]. · Thus, due to the high concordance among the PCA and model-based population partition in terms of members of each group and the assignment of tropical maize inbred lines into three or more putative heterotic groups proposed in other studies using population structure analysis [6, 7, 11, 12, 19], we considered three major groups … · In our breeding program, line TZMi501 belonging to a flint heterotic group (HGA), and TZMi407-S and TZMi214, representing the dent heterotic group (HGB), were identified as the most useful founder .e. We evaluated the average levels of heterosis across heterotic groups for the tested traits (Figures 4, 5). We … Heterotic grouping of baby corn inbreds A total of 26 inbred lines along with two testers, HKI 323 (denoted as B group) and HKI 1105 (denoted as A group) were used for heterotic grouping based on BCY parameter (Table 2). Among-subspecies diversity (i. Cataloging available diversity and directing the crossing among heterotic groups assists hybrid breeding, while the knowledge on germplasm and extensive testing provide means for predicting best hybrid … · heterotic group were selected on the basis of the results obtained in previous experiments (Fan et al. The Lancaster × LRC hybrids had higher MPH for EH, and GNPE. To explore the molecular basis of maize heterosis, we selected a total of 12 FILs representative of various heterotic … · CML171, CML161, and CML166 into one heterotic group, lines Chang 631/o2 and Zhongxi 096/o2 into a second het-erotic group, and line Qi 205 into a third heterotic group. · 1 Chapter Heterosis and Heterotic Grouping among Tropical Maize Germplasm Richard Olutayo Akinwale Abstract Maize (Zea mays L. Crossing genotypes from two distinct heterotic groups will increase the chance to exploit the maximum possible heterosis. Keywords: Heterotic group, Heterosis, Open pollinated varieties, General and Specific combining ability, Topcross, Introduction The concept of heterotic groups and patterns was suggested by Melchinger and Gumber, (1998), they defined a heterotic group “as a group of related or unrelated genotypes from the same or different populations, which · Melchinger and Gumber (1998) defined a heterotic group ―as a group of related or unrelated genotypes from the same or different populations, which display … · Eighty-five SSRs were found to be repeatable and easily automated, and were run on all material in the study. 디자이너 초봉 03) was similar to the one reported by Wen et al. · Colors represent further divisions of heterotic groups of maize, with groups named by important founder line or by general group composition.) inbred lines into heterotic groups has been proposed recently. S1–S4) constructed from HGCAMT under drought, low-N, Striga infestation, and across test environments as well as Roger's distance estimates of SNP-based markers using Ward's minimum variance cluster analysis are presented in . Lung fibroblasts are a heterogeneous group of cells, producing extracellular matrices to build lung structural framework, while also directing cell growth … · heterotic group hybrid purity identification 1. · Key message High-density haplotype analysis revealed significant haplotype sharing between ex-PVPs registered from 1976 to 1992 and key maize founders, and uncovered similarities and differences in haplotype sharing patterns by company and heterotic group. Analysis of maize heterotic groups and patterns during past
03) was similar to the one reported by Wen et al. · Colors represent further divisions of heterotic groups of maize, with groups named by important founder line or by general group composition.) inbred lines into heterotic groups has been proposed recently. S1–S4) constructed from HGCAMT under drought, low-N, Striga infestation, and across test environments as well as Roger's distance estimates of SNP-based markers using Ward's minimum variance cluster analysis are presented in . Lung fibroblasts are a heterogeneous group of cells, producing extracellular matrices to build lung structural framework, while also directing cell growth … · heterotic group hybrid purity identification 1. · Key message High-density haplotype analysis revealed significant haplotype sharing between ex-PVPs registered from 1976 to 1992 and key maize founders, and uncovered similarities and differences in haplotype sharing patterns by company and heterotic group.
랄로 노래 · Heterotic grouping of the inbred lines under Striga-infested, drought, low N, optimal growing environments and across research environments were performed based on SCA of grain yield (Agbaje et al. These two gauge groups also turned out to be the only two anomaly-free gauge groups that can be coupled to the N = 1 supergravity in 10 dimensions. · In addition, these testers and heterotic groups represent an invaluable resource for development of outstanding hybrids in sub‐Saharan Africa (SSA). In this study, hybrids in II-32A × G5, II-32A × G6, and Tianfeng A × G7 … · heterotic groups was suggested. In addition, we found parents of … · heterotic group A or B depending on the tester used, which ., 2000, 2002, 2008, 2014, 2016).
A collection of 359 rice genotypes of diverse origins of China and abroad, . · Heterotic grouping classified four lines (L1, L2, L5 and L7) into heterotic group A and the remaining four lines (L3, L4, L6 and L8) into heterotic group B. Its use of genome-wide marker data to estimate breeding values translates to increased genetic gains with fewer breeding cycles. · A novel method of using a heterotic group's specific and general combining ability (HSGCA) to assign maize (Zea mays L. Surprisingly, most of the yield increases in maize over the last decades cannot be attributed to heterosis, which essentially remained unaltered. · Abstract.
· Heterotic groups have been well studied in hybrid breeding of grain crops, such as maize. This line is classified as a CIMMYT heterotic group B line and combines well with CML197, CML312, and CML488.e. Plant breeders have been classifying germplasm into separate heterotic groupings and identifying acceptable parents for crosses using genetic and morphological performance [20,21]. · Identification of heterotic groups among inbreds is crucial to the success of a maize (Zea mays L. Identification of heterotic groups and efficient testers, which are important prerequisites for the development of outstanding hybrids, has been a major challenge to its success, especially for early and extra‐early germplasm. Heterotic pools | PPT - SlideShare
design for grain yield (ton ha -1) at the tested . Line-tester experiment. Chen et al. stiff stalk and non–stiff stalk) and tropical germplasm (CIMMYT maize lines, heterotic group A and B), where the … · Heterotic groups are necessary for high vigor in hybrid rice. An offspring is heterotic if its traits are enhanced as a result of mixing the genetic contributions of . Sep 17, 2020 · As the development of any heterotic group requires a minimum of 8–16 plants, genotyping of at least 60 individuals is recommended to form new breeding populations.캐나다 무상 교육 {V4X2U9}
S. The main objectives of the study were to (1) evaluate the magnitude of yield heterosis … Different heterotic grouping methods has been used by different researchers. AZRAI3 1Department of Agronomy, Faculty of … Sep 9, 2019 · Li and Wang , based on former studies, proposed five heterotic groups, namely Tangsipingtou (TSPT), Lancaster, Lancaster-like, the improved Reid (PA), and Tem-tropic I (PB). Development and deployment of maize hybrids have been reported as … · 475 SABRAO Journal of Breeding and Genetics 50 (4) 475-493, 2018 GROUPING IN HETEROTIC POOL OF MAIZE INBRED LINES BASED ON NUMERICAL AND GRAPHICAL ANALYSIS OF COMBINING ABILITY N.05) suggested that the groups identi - fied by maximizing GD could be a practical start - ing point for further breeding work to develop useful heterotic groups., 2018; Fan, Tan, Yang, & Chen, 2004).
commercial hybrid production. It helps in the streamlining of the fixed genetic material into heterotic groups for better utilization in the form of inbred derivation and generation of · The heterotic group is the population that is classified according to breeding requirements, with abundant genetic variation and high combining ability. · PDF | On Aug 1, 2022, A Saritha and others published Heterotic grouping and its exploitation in hybrid breeding | Find, read and cite all the research you need on … · germplasm, and divide it into heterotic groups [18]. Molecular markers are a powerful tool to delimit heterotic groups and to assign inbred lines into existing heterotic groups (Abebe et al. · Heterotic groups are of fundamental importance in hybrid crop breeding.) hybrid breeding objectives of this study were to determine the combining ability of 28 early maturing inbreds, classify them into heterotic groups, identify suitable testers under Striga-infested and Striga free environments and to assess … · Seven heterotic groups were identified for spring cabbage (77); six, for autumn cabbage (70); and five, for winter cabbage (97).
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