Genetic Control of Cold Hardiness in Blueberry

1997 ◽  
pp. 99-106 ◽  
Author(s):  
Rajeev Arora ◽  
Lisa J. Rowland ◽  
Ganesh R. Panta ◽  
Chon-Chong Lim ◽  
Jeffrey S. Lehman ◽  
...  
Keyword(s):  
Genetic Control ◽  
Cold Hardiness

scholarly journals Heritability and Combining Ability for Cold Hardiness from Partial Dialleles in Iranian Pomegranate Cultivars

HortScience ◽  
2018 ◽  
Vol 53 (4) ◽  
pp. 427-431 ◽  
Author(s):  
Ali Akbar Ghasemi Soloklui ◽  
Ali Gharaghani ◽  
Nnadozie Oraguzie ◽  
Armin Saed-Moucheshi
Keyword(s):  
Genetic Control ◽  
Combining Ability ◽  
Cold Hardiness ◽  
Fruit Breeding ◽  
Narrow Sense Heritability ◽  
Diallel Crossing ◽  
Cold Condition ◽  
Half Diallel ◽  
Natural Freezing ◽  
Made In

The development of cultivars with broader climatic adaptation has recently become the objective of most fruit breeding programmers. Regarding the importance of genetic control of cold hardiness as an influential characteristic for pomegranate and lacking studies in this area, the genetic control of cold hardiness in pomegranate using a partial mating scheme was studied. Five parents, including ‘Rabab Post Ghermez Neyriz’, ‘Malas Yazdi’, ‘Poost Sefid Dezful’, ‘Malas Pishva Varamin’, and ‘Poost Nazok Torosh Abarkuh’ with different cold hardiness capability were screened following a cold hardiness test in the laboratory and an evaluation of cold injury after natural freezing events in the field. The five screened cultivars were crossed in half-diallel crossing scheme with a total of 10 crosses in the Spring of 2014. Cold hardiness of the parent cultivars and the F1 progenies were investigated using the electrolyte leakage (EL) method. Results showed that both general combining ability (GCA) and specific combining ability (SCA) were statistically significant. The hardiest parent (‘Poost Nazok Torosh Abarkuh’) showed the largest positive GCA effect (1560.59) for winter survival, suggesting that this parent is capable to produce tolerant offspring with high breeding values in crossing programs. The significant SCA in this study suggests that specific crosses should be targeted to produce highly capable offspring. Cross between ‘Poost Nazok Torosh Abarkuh’ and ‘Malas Pishva Varamin’ showed high value for SCA (1661.74), indicating capability for production of tolerant offspring to the cold condition. Furthermore, high broad-sense heritability (0.70) and moderate narrow-sense heritability (0.45) for cold hardiness indicate that a reasonable progress could be made in improvement of this trait through conventional breeding.

Genetic control of cold hardiness and vernalization requirement in rye

Genome ◽  
1989 ◽  
Vol 32 (1) ◽  
pp. 19-23 ◽  
Author(s):  
A. L. Brule-Babel ◽  
D. B. Fowler
Keyword(s):  
Genetic Control ◽  
Secale Cereale ◽  
Cold Hardiness ◽  
Growth Habit ◽  
Vernalization Requirement ◽  
Winter Rye ◽  
Multiple Alleles ◽  
Cytoplasmic Effects ◽  
Wide Range ◽  
Secale Cereale L

Rye (Secale cereale L.) is recognized as the most cold-tolerant winter cereal species. However, little is known of the genetic control of cold hardiness and its interaction with vernalization requirement in rye. In the present study, the modes of inheritance of cold hardiness and vernalization requirement were investigated in crosses among one spring and two winter rye cultivars that represented a wide range of winter survivability. Differences in growth habit were found to be determined by a single dominant gene for the spring growth habit. Multiple alleles, or modifiers, for this major gene may also have been present. Cold hardiness was controlled by genes with mainly additive effects, but other factors may also have been involved. Cytoplasmic effects were not detected. Broad-sense heritability estimates were generally high (48–82%), indicating that selection for cold hardiness should be effective in breeding programs.Key words: Secale cereale L., dominance, additive gene action, heritability, cytoplasmic effects.

scholarly journals Use of Blueberry to Study Genetic Control of Chilling Requirement and Cold Hardiness in Woody Perennials

HortScience ◽  
1999 ◽  
Vol 34 (7) ◽  
pp. 1185-1191 ◽  
Author(s):  
Lisa J. Rowland ◽  
Elizabeth L. Ogden ◽  
Rajeev Arora ◽  
Chon-Chong Lim ◽  
Jeffrey S. Lehman ◽  
...  
Keyword(s):  
Genetic Control ◽  
Cold Hardiness ◽  
Chilling Requirement ◽  
Woody Perennials

Genetics of cold hardiness in a cloned full-sib family of coastal Douglas-fir

2000 ◽  
Vol 30 (5) ◽  
pp. 837-840 ◽  
Author(s):  
T S Anekonda ◽  
W T Adams ◽  
S N Aitken ◽  
D B Neale ◽  
K D Jermstad ◽  
...  
Keyword(s):  
Genetic Control ◽  
Pseudotsuga Menziesii ◽  
Cold Hardiness ◽  
Genetic Correlations ◽  
Douglas Fir ◽  
Cold Injury ◽  
Narrow Sense ◽  
Family Selection ◽  
Rooted Cuttings ◽  
Breeding Populations

Variation in cold-hardiness traits, and their extent of genetic control and interrelationships, were investigated among individuals (clones) within a single large full-sib family of coastal Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco) from Oregon. Cold injury to needle, stem, and bud tissues was evaluated in fall 1996 and spring 1997 following artificial freeze testing of detached shoots collected from 4-year-old ramets (rooted cuttings). Variation among clones in cold-injury scores was significant (p < 0.01) for all shoot tissues in both fall and spring and averaged about three times the magnitude previously observed among open-pollinated families of this species. Thus, improving cold hardiness by within-family selection appears to hold much promise. Striking similarities in relative magnitudes of heritability estimates and genetic correlations in the full-sib family, compared with breeding populations, support the following hypotheses about the quantitative genetics of cold hardiness in this species: (i) heritability of cold hardiness (both broad-and-narrow-sense) is stronger in the spring than in the fall; (ii) cold hardiness of different shoot tissues in the same season is controlled by many of the same genes; and (iii) genetic control of fall cold hardiness is largely independent of cold hardiness in the spring.

Genetic selection for cold hardiness in coastal Douglas-fir seedlings and saplings

2000 ◽  
Vol 30 (11) ◽  
pp. 1799-1807 ◽  
Author(s):  
Gregory A O'Neill ◽  
Sally N Aitken ◽  
W Thomas Adams
Keyword(s):  
Genetic Control ◽  
Cold Hardiness ◽  
Genetic Correlations ◽  
Genetic Selection ◽  
Douglas Fir ◽  
Direct Selection ◽  
Bud Burst ◽  
Individual Tree ◽  
Breeding Populations ◽  
Bud Set

Genetic control of cold hardiness in two-year-old seedlings was compared with that in 7-year-old saplings of 40 open-pollinated families in each of two breeding populations (Coast and Cascade) of coastal Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco) from western Oregon. In addition, the efficacy of bud phenology traits as predictors of cold hardiness at the two stages was explored. Fall and spring cold hardiness were assessed using artificial freeze testing. Similar genetic control of cold hardiness in seedlings and saplings is suggested by strong type-B genetic correlations (rB) between the two ages for fall and spring cold injury traits (rB[Formula: see text] 0.78) and by similar trends in individual tree heritability estimates (hi2), e.g., hi2was greater in spring (h–i2= 0.73) than in fall (h–i2= 0.36) and greater in the Coast population (h–i2= 0.69) than in the Cascade population (h–i2= 0.40) at both ages. Strong responses to direct selection are expected for spring cold hardiness at both ages and for fall cold hardiness in seedlings, even under mild selection intensities. Similar heritabilities in seedlings and saplings, and strong genetic correlations between ages for cold-hardiness traits, ensure that selection at one age will produce similar gains at the other age. Type-A genetic correlations (rA) between fall and spring cold hardiness were near zero in the Cascade population (rA= 0.08 and -0.14 at ages 2 and 7, respectively) but were moderate and negative in the Coast population (rA= -0.54 and -0.36, respectively). Bud-burst timing appears to be a suitable surrogate to artificial freeze testing for assessing spring cold hardiness in both seedlings and saplings, as is bud set timing for assessing fall cold hardiness in seedlings, but bud set timing is a poor predictor of fall cold hardiness in saplings.

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