· 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. 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. The hybrids. · 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. Key words Sep 1, 2016 · Combining ability estimates of lines to be used in breeding are useful for maize (Zea mays L. In this review, we cover the history of GS and highlight particular milestones during its adaptation to maize breeding. An offspring is heterotic if its traits are enhanced as a result of mixing the genetic contributions of its parents. The EARLYGEM 21 populations with exotic background were . 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. 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. Using a line × tester mating design, 150 testcrosses were generated in Yunnan. This line is classified as a CIMMYT heterotic group B line and combines well with CML197, CML312, and CML488.
, 2000, 2002, 2008, 2014, 2016). Its use of genome-wide marker data to estimate breeding values translates to increased genetic gains with fewer breeding cycles. · 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. · Heterotic groups have been well studied in hybrid breeding of grain crops, such as maize. 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.S.
) 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. · As heterotic group assignment is made based on combining ability from diallel experiments, several authors suggested the use of molecular markers in heterotic grouping [2–7]. 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 ., 2008)., Indica × Japonica) have extensive . · The heterotic grouping agreed with genetic background information and heterotic group’s specific and general combining ability estimates.
보테가 베네타 로고 태그 키링 네이비 The .e. Summary of the different heterotic groups for the 30 early-maturing QPM inbreds based on dendograms (Supplemental Fig. M. · 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. · 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.
GCA had little value in clustering parents for predicting heterosis. 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., 2018; Fan, Tan, Yang, & Chen, 2004). · Heterotic grouping based on the GCA effects of multiple traits (HGCAMT) was used to classify the 13 QPM inbreds into heterotic groups.47 Mg ha-1, P < 0. 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. Determination of Heterotic Groups and Heterosis Analysis of Yield Performance Results.) 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 . Chen et al. Founder inbreds B14, B37, B73, and, to a lesser extent, B84, are . 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). · Heterotic groups are of fundamental importance in hybrid crop breeding.
Results.) 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 . Chen et al. Founder inbreds B14, B37, B73, and, to a lesser extent, B84, are . 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). · Heterotic groups are of fundamental importance in hybrid crop breeding.
Concept of Heterotic Group and its Exploitation in Hybrid
Though, RFLP- Sep 4, 2023 · High-quality reference genome assemblies, representative of global heterotic patterns, . 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. 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. Introduction Cabbage ( Brassica oleracea L. Time course imaging of two maize inbreds and their F1 hybrid (middle) exhibiting heterosis. However, hybrids produced from crosses between parents from different rice subspecies (i.
Nagesh Kumar Professor Dept. The development of … · were part of the same heterotic group (Table 3).. 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. 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. · 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.Imax 차이
Fifty-three of these SSRs were found to be the most discriminatory and will be used in future routine fingerprinting studies. Heterotic groups are made up of genotypes that do well when mixed with genotypes from another heterotic group [19]. ARIFIN1*, A. ARDIARINI1 and M. Analysis of variance of line-tester mating. · into Heterotic Group A or B according to their combin-CML342, CML343) (Fig.
) is an important source of inbreds used in U. 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. · Heterotic Groups Contributed to Trait-Specific Advantages in Heterosis., 2020). · 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. pment of Heterotic Pools in Germplasm /Genetic stocks and Inbreds, their Improvement for Increasing Heterosis Submitted by: a RAD/2018-18 Ph.
Line-tester experiment.A. 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]. 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). Sep 1, 2018 · Therefore, heterotic groups based on molecular markers must first be determined in order to predict heterosis efficiently. 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. D 1st year (GPBR) Submitted to: Dr. The Lancaster × LRC hybrids had higher MPH for EH, and GNPE. This study was carried out to (a) identify the most efficient heterotic grouping method for classifying a set of inbred lines and (b) … · The search for heterotic groups is a key point to improve the process of semi-hybrid construction. · 1 Chapter Heterosis and Heterotic Grouping among Tropical Maize Germplasm Richard Olutayo Akinwale Abstract Maize (Zea mays L. 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 . 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. 글쟁이 S · Heterotic groups and testers for the newly developed or introduced set of inbred lines in a breeding program must be determined (Barata & Carena, 2006; Fan et al. We evaluated the average levels of heterosis across heterotic groups for the tested traits (Figures 4, 5).) is the most important staple cereal cultivated in sub-Saharan Africa but its productivity is considerable low due to several factors. Heterotic group constitution is the fundamental step for exploitation of heterosis and developing superior hybrids (Aguiar et al. The creation of heterotic groups in maize is based on . · 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 . Analysis of maize heterotic groups and patterns during past
· Heterotic groups and testers for the newly developed or introduced set of inbred lines in a breeding program must be determined (Barata & Carena, 2006; Fan et al. We evaluated the average levels of heterosis across heterotic groups for the tested traits (Figures 4, 5).) is the most important staple cereal cultivated in sub-Saharan Africa but its productivity is considerable low due to several factors. Heterotic group constitution is the fundamental step for exploitation of heterosis and developing superior hybrids (Aguiar et al. The creation of heterotic groups in maize is based on . · 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 .
Samsung update 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. See more. var. · of among- versus within-group crosses (0. Molecular markers would be the first choice for developing heterotic groups in wheat. In the United States, the maize germplasm was classified into two major heterotic groups – Stiff Stalk (SS) and Non‐Stiff Stalk (NSS).
The concept of heterotic groups has more recently been adapted to other plant species. 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. 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.R. 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. Acquaah [38] implicated maternal cytoplasmic effect for yield in plants.
Phenotypic descriptors and molecular markers have been widely used in crop diversity studies to measure genetic distances (Darvishzadeh, 2012). In this study, hybrids in II-32A × G5, II-32A × G6, and Tianfeng A × G7 … · heterotic groups was suggested. · Colors represent further divisions of heterotic groups of maize, with groups named by important founder line or by general group composition. Molecular markers are a powerful tool to delimit heterotic groups and to assign inbred lines into existing heterotic groups (Abebe et al. · The use of temperate maize (Zea mays L. 121 carried out a genome-wide . Heterotic pools | PPT - SlideShare
, 2004). 2003) IITA initially developed populations with their own heterotic groupings but is gradually aligning these with CIMMYT’s A × B … · Specific pair of heterotic groups (either populations or lines) whose hybrids show high heterosis and yield define a heterotic pattern., 2000, 2002, 2008, 2014, 2016). Six plants from each of the 25 inbreds ( ♀) were pollinated with each tester ( ♂). Agronomic. The EARLYGEM 21 populations with exotic background were assigned to a unique heterotic group.Momozono Rena Missav
· Selection, verification and kinship of 12 FILs. CML141, CML142, CML147, CML151, CML153, CML155, CML157, and ing ability with the testers mentioned above. These hybrids and their parents were evaluated for two successive years in northern China. commercial hybrid production. 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. capitata) is an important cruciferous vegetable widely cultivated all over … Sep 13, 2021 · A heterotic group (HG) refers to a collection of germplasm that when crossed with germplasm from another group, gives rise to desirable heterosis (on average) compared to the crossing of pairs of .
The 19 inbred lines were selected on the basis of … · Fan et al. · The difference of average shared-allele GD among within- and between-group matings (0.) inbreds with expired Plant Variety Protection in tropical maize breeding programs could enhance the combining ability for grain yield among tropical heterotic used DNA markers from the DArTseq genotyping-by-sequencing platform to investigate the genetic structure of lines with … · This method has the advantages of fast speed, fixed heterotic mode, and quick recovery of beneficial parental genotypes compared to traditional pedigree breeding using elite hybrids. long-term selection. 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. · A novel method of using a heterotic group's specific and general combining ability (HSGCA) to assign maize (Zea mays L.
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