scholarly journals Hybrid breeding for biomass yield in winter triticale: II. Combining ability and hybrid prediction

2020 ◽  
Vol 139 (5) ◽  
pp. 906-915
Author(s):  
Johannes Trini ◽  
Hans Peter Maurer ◽  
Sigrid Weissmann ◽  
Tobias Würschum
Keyword(s):  
Combining Ability ◽  
Biomass Yield ◽  
Hybrid Breeding ◽  
Hybrid Prediction ◽  
Winter Triticale

scholarly journals Hybrid Breeding for MLN Resistance: Heterosis, Combining Ability, and Hybrid Prediction

Plants ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 468
Author(s):  
Christine Nyaga ◽  
Manje Gowda ◽  
Yoseph Beyene ◽  
Wilson T. Murithi ◽  
Juan Burgueno ◽  
...  
Keyword(s):  
Disease Severity ◽  
Combining Ability ◽  
Genetic Parameters ◽  
Artificial Inoculation ◽  
Hybrid Breeding ◽  
Hybrid Performance ◽  
Hybrid Prediction ◽  
Quantitative Genetic ◽  
Per Se ◽  
Quantitative Genetic Parameters

Prior knowledge on heterosis and quantitative genetic parameters on maize lethal necrosis (MLN) can help the breeders to develop numerous resistant or tolerant hybrids with optimum resources. Our objectives were to (1) estimate the quantitative genetic parameters for MLN disease severity, (2) investigate the efficiency of the prediction of hybrid performance based on parental per se and general combining ability (GCA) effects, and (3) examine the potential of hybrid prediction for MLN resistance or tolerance based on markers. Fifty elite maize inbred lines were selected based on their response to MLN under artificial inoculation. Crosses were made in a half diallel mating design to produce 307 F1 hybrids. All hybrids were evaluated in MLN quarantine facility in Naivasha, Kenya for two seasons under artificial inoculation. All 50 inbreds were genotyped with genotyping-by-sequencing (GBS) SNPs. The phenotypic variation was significant for all traits and the heritability was moderate to high. We observed that hybrids were superior to the mean performance of the parents for disease severity (−14.57%) and area under disease progress curve (AUDPC) (14.9%). Correlations were significant and moderate between line per se and GCA; and mean of parental value with hybrid performance for both disease severity and AUDPC value. Very low and negative correlation was observed between parental lines marker based genetic distance and heterosis. Nevertheless, the correlation of GCA effects was very high with hybrid performance which can suggests as a good predictor of MLN resistance. Genomic prediction of hybrid performance for MLN is high for both traits. We therefore conclude that there is potential for prediction of hybrid performance for MLN. Overall, the estimated quantitative genetic parameters suggest that through targeted approach, it is possible to develop outstanding lines and hybrids for MLN resistance.

Hybrid breeding for biomass yield in winter triticale: I. Hybrid performance, trait correlations and heterosis

2016 ◽  
Vol 135 (5) ◽  
pp. 560-566 ◽  
Author(s):  
Dominik Losert ◽  
Hans Peter Maurer ◽  
Sigrid Weissmann ◽  
Tobias Wü rschum
Keyword(s):  
Biomass Yield ◽  
Hybrid Breeding ◽  
Hybrid Performance ◽  
Performance Trait ◽  
Winter Triticale ◽  
Trait Correlations

Prospects for Hybrid Breeding in Winter Triticale: I. Heterosis and Combining Ability for Agronomic Traits in European Elite Germplasm

Crop Science ◽  
2005 ◽  
Vol 45 (4) ◽  
pp. 1476-1482 ◽  
Author(s):  
G. Oettler ◽  
S. H. Tams ◽  
H. F. Utz ◽  
E. Bauer ◽  
A. E. Melchinger
Keyword(s):  
Combining Ability ◽  
Agronomic Traits ◽  
Hybrid Breeding ◽  
Winter Triticale ◽  
Elite Germplasm

scholarly journals Construction of a breeding parent population of Populus tomentosa based on SSR genetic distance analysis

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Zhiqiang Han ◽  
Qiang Han ◽  
Yufei Xia ◽  
Xining Geng ◽  
Kang Du ◽  
...  
Keyword(s):  
Genetic Distance ◽  
Combining Ability ◽  
Growth Traits ◽  
Random Mating ◽  
Specific Combining Ability ◽  
Hybrid Breeding ◽  
High Fertility ◽  
Germplasm Resources ◽  
Parent Population ◽  
High Genetic Diversity

Abstract Parent selection is the core of hybrid breeding. The breeding strategy involving the parental identification of superior open-pollinated progeny of Populous tomentosa germplasm resources can significantly improve the efficiency of parental matching. However, due to some factors such as loose powdering time and pollen competitiveness, the offspring derived from open-pollination families which do not undergo completely random mating. Although hybrid combinations based on the male identification method have a high combining ability, this method cannot easily cover the mating combinations of all male and female specimens in the germplasm bank. In addition, the performance of superior plants in open-pollinated families also affects the selection result. If the trait performance value is higher than the population average, then the special combining ability of the reconstructed hybrid combination may be overestimated. Obtaining a solution to the above problems is of great significance for improving the efficiency and accuracy of selecting hybrid parents of P. tomentosa. In this study, 24 pairs of SSR (Simple Sequence Repeats) molecular markers were used to analyze the genetic differentiation of P. tomentosa germplasm resources. The results showed that the genetic variation of the P. tomentosa population was derived from individuals within the provenance, indicating that high genetic diversity is preserved in provenances. The correlation analysis showed that there was a significant positive correlation between the special combining ability of planting height and diameter at breast height (dbh) of the 34 full-sib progeny population and the genetic distance between the parents. Then, the genetic distance between 18 female plants with high fertility and 68 male plants with large pollen quantity was analyzed using this correlation. Fifteen female parents and 12 male parents were screened out, and 52 hybrid combinations with high specific combining ability for growth traits were predicted. Furthermore, for the male parent identification of superior individual plants, we constructed the breeding parent population including 10 female parents and 5 male parents, generating 14 hybrid combinations with potentially high combining ability. The results of the hybridization test showed that the specific combining ability of plant height and dbh was significantly higher than the controlled pollination. Moreover, genetic distance and paternal identification can be used to rapidly and efficiently construct hybrid parent combinations and breeding parent populations.

Hybrid Breeding in Durum Wheat: Heterosis and Combining Ability

Crop Science ◽  
2010 ◽  
Vol 50 (6) ◽  
pp. 2224-2230 ◽  
Author(s):  
M. Gowda ◽  
C. Kling ◽  
T. Würschum ◽  
W. Liu ◽  
H. P. Maurer ◽  
...  
Keyword(s):  
Durum Wheat ◽  
Combining Ability ◽  
Hybrid Breeding

scholarly journals Reproductive Cold Stress Tolerance in Sorghum F1 Hybrids is a Heterotic Trait

Agronomy ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 508
Author(s):  
André Schaffasz ◽  
Steffen Windpassinger ◽  
Rod Snowdon ◽  
Benjamin Wittkop
Keyword(s):  
Cold Stress ◽  
Cold Tolerance ◽  
Combining Ability ◽  
Pollen Viability ◽  
Field Trials ◽  
Hybrid Breeding ◽  
F1 Hybrids ◽  
F1 Hybrid ◽  
Poor Seed ◽  
High Heritability

The sensitivity of sorghum to pre-flowering cold stress, resulting in reduced pollen viability and poor seed set, is a major constraint for expanding growing areas into higher altitudes and latitudes. Nevertheless, compared to juvenile cold tolerance, reproductive cold tolerance in sorghum has received much less attention so far, and very little is known about its inheritance in F1-hybrids. We have composed a representative factorial (n = 49 experimental F1-hybrids) for a comprehensive study on heterosis and combining ability for crucial tolerance traits as spikelet fertility (panicle harvest index), seed yield and pollen viability, using field trials in stress- and control environments in Germany and Mexico as well as climate chamber experiments. Our results indicate a heterotic and rather dominant inheritance of reproductive cold tolerance in sorghum, with strong effects of female general combining ability (GCA) on F1-hybrid performance in our material. These findings, together with the comparatively low contribution of specific combining ability (SCA) effects and high heritability estimates, suggest that robust and efficient enhancement of reproductive cold tolerance is feasible via hybrid breeding.

scholarly journals Combining ability for yield and yield attributes in rice (Oryza sativa l.) genotypes using CMS system

2014 ◽  
Vol 11 (1) ◽  
pp. 23-33 ◽  
Author(s):  
CL Sharma ◽  
NK Singh ◽  
AK Mall ◽  
K Kumar ◽  
ON Singh
Keyword(s):  
Combining Ability ◽  
Genetic Variance ◽  
Gene Action ◽  
Oryza Sativa L ◽  
Additive Genetic Variance ◽  
Hybrid Breeding ◽  
Male Sterile ◽  
Yield Attributes ◽  
Genetic Components ◽  
Per Se

Seventy five hybrids generated from crossing three cytoplasmic male sterile lines with 25 testers were studied along with parents for combining ability and gene action involved in expression of characters in rice. The GCA and SCA effects were significant for all the characters except seedling height, indicating the importance of both additive and non additive genetic components. The ratio of gca and sca variance was less than unity for all the characters also indicated preponderance of non additive genetic variance and suggested good prospects of the exploitation of variation through hybrid breeding. Amongst the parental lines, UPR-2080-24-1-R, IR-60076-1-R, PNR-165-10-6-R and IR-58025- A were found to be good general combiners which can be taken up to generate desirable segregates for further selection. None of the crosses showed significant sca effects for all the characters. On the basis of per se performance and high sca effects, IR-58025-A x CSRC-50-2-1-4-BR, PMS-10-A x IR-42688-2-118-6-3, RPMS-100-A x UPRI-92-79-R and NMS-4-A x IR-32419-28-3-1-3-R were good specific combiners for grain yield plant-1 and their components which could be used for exploitation of heterosis for yield. DOI: http://dx.doi.org/10.3329/sja.v11i1.18372 SAARC J. Agri., 11(1): 23-33 (2013)

Potential for simultaneous improvement of grain and biomass yield in Central European winter triticale germplasm

2011 ◽  
Vol 121 (1) ◽  
pp. 153-157 ◽  
Author(s):  
Manje Gowda ◽  
Volker Hahn ◽  
Jochen C. Reif ◽  
C. Friedrich H. Longin ◽  
Katharina Alheit ◽  
...  
Keyword(s):  
Biomass Yield ◽  
Central European ◽  
Winter Triticale

scholarly journals Combining ability and response to CMS in reverse diploid maize lines developed at VIR

2020 ◽  
Vol 2 (4) ◽  
pp. 15-23
Author(s):  
E. B. Khatefov ◽  
B. R. Shomakhov ◽  
R. S. Kushkhova ◽  
R. A. Kudaev ◽  
Z. T. Khashirova ◽  
...  
Keyword(s):  
Combining Ability ◽  
Selection Index ◽  
Inbred Lines ◽  
Breeding Value ◽  
Hybrid Breeding ◽  
Maize Breeding ◽  
Tetraploid Population ◽  
Grain Moisture ◽  
Hybrid Maize ◽  
Period Duration

Abstract. Hybrid maize breeding requires constant renewal of the source material. In this regard, broadening of genetic variation in parental lines is one of the primary tasks in heterotic hybrid breeding programs. The use of reverse diploid inbred lines derived from a tetraploid population is considered as an innovative approach to achieve this goal.Results. The investigated material comprised 106 reverse diploid (rediploid) inbred lines originating from diploid plants selected in segregating selfed progenies of triploid populations and consequently subjected to inbreeding, while triploid populations resulted from a cross between plants of a tetraploid population with a broad genetic basis and a diploid line. The use of a system of crosses with 37 sterile testers belonging to different FAO maize maturity groups allowed the evaluation of the rediploid lines’ combining ability and the response to M and C types of CMS. Field tests were conducted in 2019 in the steppe zone of Kabardino-Balkaria. Forty-six lines (43.3%) with the combining ability ranging from ultra-high to good, and 78 lines (73.6%) maintaining the CMS character were identified. Among them, 59 lines (55.7%) were maintainers for the M type CMS, 15 lines (14.1%)  for C type CMS, and 4 lines maintained sterility for both CMS types. Sixteen lines (15.1%) restored pollen fertility of the forms with M type CMS, 11 lines (10.4%) were restorers for the C-type and one line turned out to be a universal restorer for both CMS types. Ranking by the “sprout - flowering of ears” interstage period duration showed that most of the lines (66.0%) with the ability to maintain sterility or restore male fertility of M and C CMS types, as well as with the combining ability from ultrahigh to good (32.6%) fell into the group with the flowering period duration of 51-55 days. According to the results of the harvested grain moisture assessment, the hybrids ♀(РГС246с × OL213) × ♂92с5986·2·3, ♀714М  ×  ♂1/67-1 and ♀714М  ×  ♂92н136-4, with the values of 13, 6%, 13.9%, 14.0%, respectively, were identified. The hybrids ♀714М × ♂1/67- 1 and ♀(OL563С × KL1392) × ♂92с0653 2 1 2 were characterized by the maximum value of the selection index, i.e. 5.03 and 5.13, respectively.Conclusions. The results of the studies showed the breeding value of rediploid lines as an initial material for hybrid maize breeding. 

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