CHARACTERISTICS OF TOBACCO FROM CROSSES BETWEEN BURLEY AND FLUE-CURED CULTIVARS

1971 ◽  
Vol 13 (2) ◽  
pp. 179-185 ◽  
Author(s):  
Bronius Povilaitis
Keyword(s):  
Combining Ability ◽  
Reducing Sugars ◽  
Sugar Content ◽  
Diallel Cross ◽  
Subjective Rating ◽  
Body Color ◽  
Total Alkaloids ◽  
Complete Diallel Cross ◽  
The Mean ◽  
Cross Test

Four burley and four flue-cured tobacco cultivars were selfed and crossed in all possible combinations to produce seed for a complete diallel cross test which was grown in 1965. Burley parents and burley × burley entries were omitted from the test in 1967 and only selected burley × flue crosses and their flue-cured parent were grown in 1968.Mean squares for the general combining ability were significant for yield, lamina weight, filling value, total alkaloids and reducing sugars, and non-significant for total nitrogen content. The mean squares for specific combining ability were significant for all six characters, suggesting that in the inheritance of these characters, additivity and dominance are both important. Heterosis effects for yield, lamina weight and reducing sugars were significant, but non-significant for days to flower and total alkaloids. The burley × flue hybrids gave considerably higher yields than their flue-cured parental cultivars. Lamina weight and the reducing sugar content of the hybrids was lower than the flue-cured tobacco cultivars. The subjective rating of the hybrids for body, color and texture of the cured leaf gave lower values than those assigned to the flue-cured parents.

COMBINING ABILITY FOR INHERITANCE OF ECONOMIC TRAITS IN OPIUM POPPY (Papaver somniferum L.)

2011 ◽  
Vol 24 (2) ◽  
pp. 01-08
Author(s):  
B. Kumar ◽  
N. K. Patra
Keyword(s):  
Combining Ability ◽  
Diallel Cross ◽  
Papaver Somniferum ◽  
Opium Poppy ◽  
Economic Traits ◽  
Degree Of Dominance ◽  
Parental Material ◽  
The Mean ◽  
Per Se ◽  
Important Medicinal Plant

Opium poppy (Papaver somniferum L.) is an important medicinal plant produces more than 80 alkaloids obtained from the capsules and straw of the plant. The estimate of combining ability gives an indication of the genetic behaviour of the parental material. It is therefore, desirable to select the parents for hybridization on the basis of their per se performance and combining ability effects. The F1, F2 and their reciprocals of an eight parent diallel cross in opium poppy were studied for combining ability of seven economic traits. The mean sum of squares due to GCA, SCA and reciprocals were significant for all the traits. The magnitude of GCA variances were invariably higher than those of SCA and thus indicating the preponderance of non-additive genetic variances, which was further affirmed by the measure of average degree of dominance i.e. ?(?2s/? 2g).  Among the parents VN35I for plant height, Sanchita and VG26 for capsules per plant, VN23, VN35I and Vivek for capsule index, VG26 and Sanchita for seed and straw yield per plant, and VN35I and VG20 for morphine content were found good general combiners. Earliness being a desired trait, parent VG20 having significant negative GCA estimates coupled with per se performance can be considered as good general combiner for early flowering. Inclusion of good general combiners in a multiple crossing program or an inter-mating population involving all possible crosses among them subjected to bi-parental mating may be expected to offer maximum promise in breeding for economic traits.DOI: http://dx.doi.org/10.3329/bjpbg.v24i2.17000

HETEROSIS, COMBINING ABILITY, AND PREDICTED SYNTHETICS FROM A DIALLEL CROSS IN SUNFLOWERS (HELIANTHUS ANNUUS L.)

1966 ◽  
Vol 46 (1) ◽  
pp. 59-67 ◽  
Author(s):  
Eric D. Putt
Keyword(s):  
Helianthus Annuus ◽  
Combining Ability ◽  
Oil Content ◽  
Diallel Cross ◽  
General Combining Ability ◽  
Specific Combining Ability ◽  
Helianthus Annuus L ◽  
The Mean ◽  
Seed Characters ◽  
Mature Weight

Heterosis occurred for the eight plant and seed characters studied. It was most frequent for yield of seed and height of plant. Mean squares for general combining ability (gca) and specific combining ability (sca) were significant (P =.01) for all characters. The estimated components for gca were greater than for sca for days to mature, weight per bushel, and percent oil in the seed; less for height and yield of seed; and essentially the same for days to bloom, diameter of head, and weight per 1000 seeds.The yield of seed and percent oil in the seed, for the highest ranking 100 synthetics that could be composed from the 10 lines, was predicted in F6 assuming 50 and 60% outcrossing between F2 and F6. Virtually all values exceeded the mean performance of four check samples of commercial hybrids. Many exceeded the highest rank check for oil content in the seed. Fourteen of the highest ranking 100 synthetics for yield and 30 for oil content consisted of two or three lines. It was concluded that synthetics can be superior to the present hybrids in heterosis and that desirable synthetics can be made from only a few lines.

Analysis of genetic effects on a complete diallel cross test of Betula platyphylla

Euphytica ◽  
2014 ◽  
Vol 200 (2) ◽  
pp. 221-229 ◽  
Author(s):  
Xiyang Zhao ◽  
Xiuyan Bian ◽  
Mengran Liu ◽  
Zhixin Li ◽  
Ying Li ◽  
...  
Keyword(s):  
Diallel Cross ◽  
Genetic Effects ◽  
Betula Platyphylla ◽  
Complete Diallel Cross ◽  
Cross Test

Genetic analysis of quantitative characters in cigar and pipe tobacco, Nicotiana tabacum. III. Economic indices: grade index, yield, and crop revenue

1983 ◽  
Vol 25 (2) ◽  
pp. 185-189 ◽  
Author(s):  
I. S. Ogilvie ◽  
V. Kozumplik
Keyword(s):  
Nicotiana Tabacum ◽  
Combining Ability ◽  
Diallel Cross ◽  
General Combining Ability ◽  
Specific Combining Ability ◽  
Total Alkaloids ◽  
Nicotiana Tabacum L ◽  
Economic Indices ◽  
Grade Index ◽  
Pipe Tobacco

A diallel cross of four cigar cultivars and one pipe tobacco (Nicotiana tabacum L.) cultivar was analyzed for the following parameters: grade index, yield, crop revenue or index, percentage of nicotine, percentage of total alkaloids, and susceptability to pole rot. The experiment was performed over 3 years. Analysis was done for general combining ability and specific combining ability. General combining ability was greater than specific combining ability for all variables although significant specific combining ability effects were also present for all parameters with the exception of nicotine and total alkaloids. Reciprocal effects were completely absent. The line Pennbel 69 showed a positive general combining ability effect for yield, crop index, and infestation by pole rot and a high negative general combining ability effect for grade index and percentage of nicotine and total alkaloids. Petit Havane showed a complete reverse of general combining ability effects for these parameters while the other three cultivars were intermediate. High positive specific combining ability effects for grade index, yield, and crop index and high negative specific combining ability effects for the percentage of pole rot were shown by crosses of Pennbel 69.

scholarly journals Inheritance of Nitrogen Use Efficiency in Inbred Progenies of Tropical Maize Based on Multivariate Diallel Analysis

2014 ◽  
Vol 2014 ◽  
pp. 1-7
Author(s):  
Fernando Lisboa Guedes ◽  
Rafael Parreira Diniz ◽  
Marcio Balestre ◽  
Camila Bastos Ribeiro ◽  
Renato Barbosa Camargos ◽  
...  
Keyword(s):  
Genetic Control ◽  
Nitrogen Use Efficiency ◽  
Combining Ability ◽  
Diallel Cross ◽  
General Combining Ability ◽  
Genetic Effects ◽  
Tropical Maize ◽  
Nitrogen Use ◽  
Complete Diallel Cross ◽  
Use Efficiency

The objective of our study was to characterize and determine the patterns of genetic control in relation to tolerance and efficiency of nitrogen use by means of a complete diallel cross involving contrasting inbred progenies of tropical maize based on a univariate approach within the perspective of a multivariate mixed model. Eleven progenies, previously classified regarding the tolerance and responsiveness to nitrogen, were crossed in a complete diallel cross. Fifty-five hybrids were obtained. The hybrids and the progenies were evaluated at two different nitrogen levels, in two locations. The grain yield was measured as well as its yield components. The heritability values between the higher and lower nitrogen input environment did not differ among themselves. It was observed that the general combining ability values were similar for both approaches univariate and multivariate, when it was analyzed within each location and nitrogen level. The estimate of variance of the specific combining ability was higher than general combining ability estimate and the ratio between them was 0.54. The univariate and multivariate approaches are equivalent in experiments with good precision and high heritability. The nonadditive genetic effects exhibit greater quantities than the additive genetic effects for the genetic control of nitrogen use efficiency.

A STUDY OF COMBINING ABILITY FOR GRAIN PROTEIN PERCENTAGE IN A DIALLEL CROSS OF FIVE SIX-ROW BARLEY CULTIVARS

1974 ◽  
Vol 54 (4) ◽  
pp. 605-609 ◽  
Author(s):  
K. G. BRIGGS
Keyword(s):  
Combining Ability ◽  
Diallel Cross ◽  
General Combining Ability ◽  
Grain Protein ◽  
Hordeum Vulgare L ◽  
Protein Percentage ◽  
Barley Cultivars ◽  
Combining Ability Analysis ◽  
Lower Protein ◽  
Complete Diallel Cross

Grain protein percentage was assessed in F1 and F2 populations in two experiments involving a complete diallel cross among the barley (Hordeum vulgare L.) cultivars Bonanza, Conquest, Olli, Galt and Jubilee. Heterosis was absent in all crosses and a Griffing combining ability analysis showed that specific combining ability was nonsignificant in both F1 and F2 populations. General combining ability (GCA) for protein percentage was highly significant in both generations, with Conquest and Olli having major positive GCA effects. Galt produced a large negative GCA effect, while Jubilee and Bonanza caused small negative GCA effects. Significant differences between the hybrids were found only in F1. Broad sense heritabilities for protein differences between the parents were 0.57 and 0.72 in the two experiments, and were significant at the 5 and 1% levels of significance, respectively. Conquest had significantly higher protein than Bonanza, with Olli being intermediate. Galt had lower protein than Jubilee, but this difference was significant in only one experiment. The differences among the five cultivars for mean grain protein percentage and general combining ability are significant in relation to breeding for malting and feed type barleys.

STUDIES ON COMBINING ABILITY IN STRAWBERRY (FRAGARIA × ANANASSA): I. NUMBER OF INFLORESCENCES, NUMBER OF FLOWERS, DAYS TO MATURITY AND NUMBER OF FRUITS

1981 ◽  
Vol 23 (3) ◽  
pp. 373-378 ◽  
Author(s):  
Shri Dhar Lal ◽  
Jitendra Nath Seth
Keyword(s):  
Combining Ability ◽  
Diallel Cross ◽  
General Combining Ability ◽  
Specific Combining Ability ◽  
Fragaria Ananassa ◽  
Specific Combination ◽  
Cytoplasmic Effects ◽  
Days To Maturity ◽  
Complete Diallel Cross

A 10 × 10 complete diallel cross was carried out in the strawberry (Fragaria × ananassa Duch.). Significant general (gca) and specific combining ability (sea) effects were recorded. The variances due to general combining ability exceeded the variances due to specific combining ability. Cytoplasmic effects were also noted. The variety Kalimpong Local was found to be a good general combiner for number of inflorescences, number of flowers and number of fruits. The variety Albritton had highest gca effect for number of inflorescences. The variety Premier was a good general combiner for number of flowers. The Redcoat showed highest gca effect for days to maturity. The best specific combination for number of inflorescences was Phenomenal × Jeolikote Local in F1 and Premier × Kalimpong Local in F2. For number of fruits Albritton × Kalimpong Local and Premier × Cavalier were the best.

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