· Colors represent further divisions of heterotic groups of maize, with groups named by important founder line or by general group composition. · Each of the grouping methods classified the inbred lines into 3 heterotic groups but SCA and heterotic groups’ specific and general combining ability had the joint highest breeding efficiency. . 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. Though, RFLP- Sep 4, 2023 · High-quality reference genome assemblies, representative of global heterotic patterns, . · 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 . This suggests that RFLP-based GDs are efficient and reliable to assess and allocate genotypes from tropical maize populations into heterotic groups. · 1 Chapter Heterosis and Heterotic Grouping among Tropical Maize Germplasm Richard Olutayo Akinwale Abstract Maize (Zea mays L. · Selection, verification and kinship of 12 FILs. · 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 . · This finding was inconsistent with the conclusion of the present study, which found that the sum of parental GCA values has a highly significant positive correlation with heterosis for some traits. · Abstract.
GCA had little value in clustering parents for predicting heterosis. In this study, 269 temperate inbred lines, most of which are widely used in Chinese maize breeding programs, . 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]. Founder inbreds B14, B37, B73, and, to a lesser extent, B84, are . The development of … · were part of the same heterotic group (Table 3). 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.
In general, the present investigation approved that inbred lines with good GCA, cross-combinations with desirable SCA and classification of lines into different heterotic groups. Lung Fibroblasts. Results. 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 . var. 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.
안양 시외버스 터미널 Sep 17, 2019 · Group-1B had 69 inbred lines, which are primarily QPM (65 lines) with mixed heterotic groups and diverse genetic backgrounds, while Group-1C consisted of 32 inbred lines that were primarily non .., 2004). Six plants from each of the 25 inbreds ( ♀) were pollinated with each tester ( ♂). 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. Plant breeders have been classifying germplasm into separate heterotic groupings and identifying acceptable parents for crosses using genetic and … · Heterotic pools.
· Heterotic grouping based on the GCA effects of multiple traits (HGCAMT) was used to classify the 13 QPM inbreds into heterotic groups. 121 carried out a genome-wide . sativa and falcata) and selfing within subspecies are reviewed as tools to manage genetic diversity and to test the value of gene and linkat interactions in crosses. Yao et al. However, hybrids produced from crosses between parents from different rice subspecies (i. Hybrids 1 × 4, 2 × 3, 1 × 6 and 2 × 5 were identified to be high yielding and stable across environments and can serve as candidates for further on-farm … · heterotic groups. Determination of Heterotic Groups and Heterosis Analysis of Yield Performance An offspring is heterotic if its traits are enhanced as a result of mixing the genetic contributions of . Heterotic groups and heterotic patterns form an integral part of hybrid breeding and help breeders to utilize their germplasm in a more efficient manner avoids unnecessary crosses to be . · of among- versus within-group crosses (0. Heterogenetic definition, of, relating to, or characterized by heterogenesis. Molecular markers are a powerful tool to delimit heterotic groups and to assign inbred lines into existing heterotic groups (Abebe et al. 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.
An offspring is heterotic if its traits are enhanced as a result of mixing the genetic contributions of . Heterotic groups and heterotic patterns form an integral part of hybrid breeding and help breeders to utilize their germplasm in a more efficient manner avoids unnecessary crosses to be . · of among- versus within-group crosses (0. Heterogenetic definition, of, relating to, or characterized by heterogenesis. Molecular markers are a powerful tool to delimit heterotic groups and to assign inbred lines into existing heterotic groups (Abebe et al. 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.
Concept of Heterotic Group and its Exploitation in Hybrid
Among-subspecies diversity (i. WALUYO1, N. These hybrids and their parents were evaluated for two successive years in northern China. We evaluated the average levels of heterosis across heterotic groups for the tested traits (Figures 4, 5). The creation of heterotic groups in maize is based on .) is an important source of inbreds used in U.
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). Summary of the different heterotic groups for the 30 early-maturing QPM inbreds based on dendograms (Supplemental Fig. 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. Heterosis, hybrid vigor, or outbreeding enhancement is the improved or increased function of any biological quality in a hybrid offspring. The . · 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.이로 치 펄 기아
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. Heterotic group constitution is the fundamental step for exploitation of heterosis and developing superior hybrids (Aguiar et al., 2008). 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 . Our team proposed a "three heterotic group" pattern consisting of Suwan1xReid, Suwan1×nonReid, and ReidxnonReid, based on long-term breeding practice [31][32] [33]. 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.
Heterotic groups are made up of genotypes that do well when mixed with genotypes from another heterotic group [19]. · Nature Plants - This study reports the genomic changes underlying the convergent and divergent agronomic improvement of the female and male heterotic … · Schematic representation of the proposed organization of heterotic groups in hybrid breeding and the utilization of novel diversity. 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. 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. (2012) using 498 maize accessions of Tuxpeno core and diverse temperate (U. This line is classified as a CIMMYT heterotic group B line and combines well with CML197, CML312, and CML488.
· 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]. Six plants from each of the 25 inbreds ( ♀) were pollinated with each tester ( ♂). pment of Heterotic Pools in Germplasm /Genetic stocks and Inbreds, their Improvement for Increasing Heterosis Submitted by: a RAD/2018-18 Ph. · Heterotic Groups Contributed to Trait-Specific Advantages in Heterosis. · Heterotic groups have been well studied in hybrid breeding of grain crops, such as maize. 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 . Furthermore, the GD-proposed heterotic groups were improved by later revising some line assignments to groups 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.V. Abstract Proprietary inbreds developed by the private seed industry … · Definition of heterosis and the concept of heterotic grouping The phenomenon of heterosis was first detected in maize. Introduction Cabbage ( Brassica oleracea L. · 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. ARIFIN1*, A. Nas 만들기 may result in mixing up of heterotic groups. · The concept of heterotic patterns, or heterotic groups, was proposed by breeders as a means of maximizing the amount of hybrid … · Classification of inbred lines into heterotic groups based on knowledge of their genetic diversity is cru-cial to the success of maize hybrid breeding program (Akinwale et al. Among these, SCA and hybrid mean, hybrid index, combined use of amplified fragment length polymorphism (AFLP), SSR markers and heterotic group’s specific and general combining ability (HSGCA) are the major grouping methods.) 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; (ii) study differences in combining ability … · Heterotic groups and patterns are extremely important in hybrid breeding. of GPBR ; ts • Introduction • Heterotic groups and patterns • History • Method … · Information on pedigree, heterotic group, and ecological adaptation of the 19 inbred lines (female) and five testers (male) used in this experiment is given in Table 1.) breeding efficiency in a hybrid-based breeding objectives of this study were to: (i) investigate whether or not breeding efficiency could be improved using a three heterotic-group (TriHG) classification (Reid and non-Reid, and Suwan1 heterotic groups) system … · It is, hence, an efficient method which enhances conventional methods for categorizing a large number of inbred lines originated from diverse germplasm sources into heterotic groups. Analysis of maize heterotic groups and patterns during past
may result in mixing up of heterotic groups. · The concept of heterotic patterns, or heterotic groups, was proposed by breeders as a means of maximizing the amount of hybrid … · Classification of inbred lines into heterotic groups based on knowledge of their genetic diversity is cru-cial to the success of maize hybrid breeding program (Akinwale et al. Among these, SCA and hybrid mean, hybrid index, combined use of amplified fragment length polymorphism (AFLP), SSR markers and heterotic group’s specific and general combining ability (HSGCA) are the major grouping methods.) 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; (ii) study differences in combining ability … · Heterotic groups and patterns are extremely important in hybrid breeding. of GPBR ; ts • Introduction • Heterotic groups and patterns • History • Method … · Information on pedigree, heterotic group, and ecological adaptation of the 19 inbred lines (female) and five testers (male) used in this experiment is given in Table 1.) breeding efficiency in a hybrid-based breeding objectives of this study were to: (i) investigate whether or not breeding efficiency could be improved using a three heterotic-group (TriHG) classification (Reid and non-Reid, and Suwan1 heterotic groups) system … · It is, hence, an efficient method which enhances conventional methods for categorizing a large number of inbred lines originated from diverse germplasm sources into heterotic groups.
GM MAX 47 Mg ha-1, P < 0. Nagesh Kumar Professor Dept. The concept of heterotic groups has more recently been adapted to other plant species. M. 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. · In general, maize germplasm was determined to consist of 4-6 heterotic groups.
· 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. 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. design for grain yield (ton ha -1) at the tested . 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. Chen et al.) is the most important staple cereal cultivated in sub-Saharan Africa but its productivity is considerable low due to several factors.
See more. The line also combines well with group B testers CML202 and CML444. 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., 2000, 2002, 2008, 2014, 2016). Plant breeders have been classifying germplasm into separate heterotic groupings and identifying acceptable parents for crosses using genetic and morphological performance [20,21]., 2020). Heterotic pools | PPT - SlideShare
Shull defined heterosis in 1914 as, “The increased vigour, speed of development, resistance to disease and insect pests, or to climatic rigours of any kind, manifested by crossbred organisms · and heterotic group’s specific and general combining ability estimates. 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. Combining ability and heterosis relationship is more complex, the establishment of heterotic group might be more help to research heterosis. · 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).A. Nine elite inbreds widely used in Chinese rapeseed hybrid breeding programs were crossed in a diallel mating design to develop 36 hybrids.배달 의 민족 주식
, Medicago sativa subsp. · The heterotic grouping agreed with genetic background information and heterotic group’s specific and general combining ability estimates. 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). The objectives of this study were to (i) … · heterotic group were selected on the basis of the results obtained in previous experiments (Fan et al. In this study, hybrids in II-32A × G5, II-32A × G6, and Tianfeng A × G7 … · heterotic groups was suggested. · into Heterotic Group A or B according to their combin-CML342, CML343) (Fig.
· Twenty-two of the inbred lines were placed in heterotic group 1 (heterotic group of testers A, B, D and E), 15 in the heterotic group 2 (heterotic group of tester C) … · Heterosis., 2000, 2002, 2008, 2014, 2016). The BCY is an important trait in baby corn cultivation; hence the same was selected for heterotic grouping. In this review, we cover the history of GS and highlight particular milestones during its adaptation to maize breeding. Sep 20, 2023 · In string theory, a heterotic string is a closed string (or loop) which is a hybrid . 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.
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