DIPLOID, ANEUPLOID AND TRIPLOID PLANTS FROM HAPLOID × DIPLOID CROSSES IN FLAX (LINUM USITATISSIMUM)

1980 ◽  
Vol 22 (4) ◽  
pp. 591-596 ◽  
Author(s):  
Beatrice E. Murray
Keyword(s):  
Seed Yield ◽  
Doubled Haploid ◽  
Linum Usitatissimum ◽  
Low Fertility ◽  
Doubled Haploid Lines ◽  
Linum Usitatissimum L ◽  
Twinning Frequency

Flax (Linum usitatissimum L.) haploids (2n = x = 15), selected from haploid-diploid twin seedlings in the cultivar Rocket 4 and crossed with diploid sibs, differed in boll-set; in frequency of diploid, aneuploid and triploid plants in each F1 family (58, 20 and 22%, respectively); and in frequency of twins in F2 families. The diploid plants of the F1 progeny were fertile and high in seed yield which contrasted with the sterility of the triploids and low fertility, or sterility, of the aneuploids. Twinning frequency and boll-set was stabilized at specific levels in some doubled haploid lines. The advantages of haploid × diploid crosses for genetic experimentation are discussed.

SOME OBSERVATIONS ON POLYEMBRYONY IN CROSSES BETWEEN TWINNING AND NONTWINNING LINES OF FLAX

1986 ◽  
Vol 66 (4) ◽  
pp. 819-824 ◽  
Author(s):  
G. G. ROWLAND ◽  
L. A. WEERASENA
Keyword(s):  
Key Words ◽  
Doubled Haploid ◽  
Linum Usitatissimum ◽  
Recurrent Selection ◽  
Female Parent ◽  
Selection Program ◽  
Doubled Haploid Lines ◽  
Linum Usitatissimum L ◽  
Significant Difference ◽  
Twinning Frequency

A recurrent selection program was initiated using the polyembryony character found in flax (Linum usitatissimum L.) to produce haploids that could then be used to create doubled haploid lines. Observations from this programme show that using the haploid member of a twin seedling as the female parent in crosses to the diploid male is not as efficient as using its diploid twin as the female parent. Previous work has suggested that in lines carrying the polyembryony character, bolls containing fewer than 10 seeds, which is the maximum number in flax, were more likely to contain a seed that would give rise to a twin seedling. In this study twin seedlings were obtained from seed of bolls containing from 1 to 10 seeds, and bolls with 10 seeds were often as good a source of twin seedlings as those with nine seeds or fewer. There was no significant difference in the twinning frequency of F2 seed of crosses between twinning and nontwinning lines (range 0.8–1.9%) but these same crosses were significantly different in twinning frequency in doubled haploid lines (range 1.1–7.9%). The twinning frequency of individual doubled haploid lines within crosses varied from 0.4 to 20.3%.Key words: Flax, haploid breeding, polyembryony, Linum usitatissimum

Combining ability and heterosis studies across environments in linseed (Linum usitatissimum L.)

2011 ◽  
Vol 59 (1) ◽  
pp. 87-102 ◽  
Author(s):  
S. Sood ◽  
N. Kalia ◽  
S. Bhateria
Keyword(s):  
Seed Yield ◽  
Linum Usitatissimum ◽  
Combining Ability ◽  
Yield Components ◽  
Block Design ◽  
Linum Usitatissimum L ◽  
Randomized Block Design ◽  
Component Traits ◽  
Parental Lines ◽  
Fibre Yield

Combining ability and heterosis were calculated for fourteen lines of linseed in a line × tester mating design using twelve lines and two diverse testers in two different environments. The hybrids and parental lines were raised in a completely randomized block design with three replications to investigate seed and fibre yield and their component traits. Genetic variation was significant for most of the traits over environments. Combining ability studies revealed that the lines KL-221 and LCK-9826 were good general combiners for seed yield and most of its components, whereas LMH-62 and LC-2323 were good general combiners for yield components only. Moreover, KL-221 was also a good general combiner for fibre yield. Similarly, B-509 and Ariane were good general combiners for fibre yield and most of its components. Among the specific cross combinations, B-509 × Flak-1 was outstanding for seed yield per plant and B-509 × KL-187 and LC-2323 × LCK-9826 for fibre yield per plant, with high SCA effects. In general, the hybrids excelled their respective parents and the standard checks for most of the characters studied. Based on the comparison of mean performance, SCA effects and the extent of heterosis, the hybrids LC-2323 × LCK-9826 and B-509 × KL-221 appeared to be the most promising for both seed and fibre yield. Other promising combinations were LC-2323 × KL-210 and B-509 × Ariane for seed and fibre yield, respectively. The superiority of LC-2323, LCK-9826, KL-221, B-509 and Ariane as good general combiners was further confirmed by the involvement of these parents in the desirable cross combinations.

Doubled haploid production in Flax (Linum usitatissimum L.)

2009 ◽  
Vol 27 (4) ◽  
pp. 371-375 ◽  
Author(s):  
Bohuš Obert ◽  
Zuzana Žáčková ◽  
Jozef Šamaj ◽  
Anna Preťová
Keyword(s):  
Doubled Haploid ◽  
Linum Usitatissimum ◽  
Linum Usitatissimum L ◽  
Haploid Production

Flax (Linum usitatissimum L.) responses to chilling and heat stress on flowering and seed yield

1997 ◽  
Vol 77 (1) ◽  
pp. 97-99 ◽  
Author(s):  
L. V. Gusta ◽  
B. J. O'Connor ◽  
R. S. Bhatty
Keyword(s):  
Heat Stress ◽  
Seed Yield ◽  
Linum Usitatissimum ◽  
Oil Quality ◽  
Oil Composition ◽  
Flowering Stage ◽  
Linum Usitatissimum L ◽  
Flower Yield ◽  
Delayed Flowering ◽  
Chilling Treatment

The effect of a 5 °C chilling treatment at the seedling stage on days to flower, yield and oil quality and quantity was determined for seven cultivars of flax (Linum usitatissimum L.). Three days of chilling delayed flowering in Dufferin, McGregor and NorLin, whereas 5 d of chilling delayed flowering in all cultivars except Andro and Noralta. Seven days of chilling reduced the seed yield of only McGregor, Norlin, NorMan and Vimy. The effect of a 40 °C heat stress at the flowering stage on yield and oil composition was determined for the same seven cultivars. A heat stress of 40 °C for 3 d reduced the seed yield of NorMan, whereas, a 5 d stress reduced the seed yield of all cultivars except McGregor and Noralta. The composition of the oil was not affected by the heat stress. These results suggest genetic variability exists among flax cultivars for tolerance to chilling and heat stresses. Controlled tests can be used to select superior stress tolerant genotypes. Key words: Flax, chilling, heat, flowering, yield

scholarly journals Studies on Correlation and Path Analysis in Linseed (Linum usitatissimum L.) Over Locations in Mid-hills of North-Western Himalayas

2021 ◽  
Author(s):  
Garima Thakur ◽  
Satish Paul ◽  
Uttam Chandel ◽  
Ronika Thakur
Keyword(s):  
Grain Yield ◽  
Seed Yield ◽  
Linum Usitatissimum ◽  
Seed Weight ◽  
Harvest Index ◽  
Significant Positive Correlation ◽  
Agricultural Research ◽  
Positive Correlation ◽  
Linum Usitatissimum L ◽  
Important Trait

Background: Seed yield is a very important trait for selection but shows low heritability and hence is difficult to improve. Since the productivity of linseed (Linum usitatissimum L.) in India as well as Himachal Pradesh is low in comparison to other major linseed growing countries and states, improvement in cultivars for grain yield is a must. Therefore, the present study was aimed for studying the character associations in linseed genotypes for seed yield over locations. Method: The experiment was conducted during rabi 2019-2020. The experimental material for the present investigation comprised of 52 linseed genotypes grown over three locations in Himachal Pradesh i.e. Linseed Experimental Farm, CSK HPKV, Palampur (1290 m amsl), Shivalik Agricultural Research and Extension Centre, Kangra (700 m amsl) and Hill Agricultural Research and Extension Centre, Dhaulakuan (468 m amsl). Randomized block design with three replications was used. Phenotypic and genotypic correlation coefficients were worked out as per the procedure outlined by Burton and De Vane (1953) and Johnson et al. (1955). Direct and indirect effects of component traits on grain yield were worked out using correlation coefficient of various traits as suggested by Wright (1921) and elaborated by Dewey and Lu (1959). Result: Correlation studies indicated highly significant positive correlation for seed yield with 1000 seed weight (0.965**) followed by harvest index (0.801**), secondary branches (0.585**) and a significant correlation with biological yield (0.269**). Seed yield exhibited a non-significant positive correlation with seeds per capsule. However, a negative significant correlation was observed for seed yield with days to 50 per cent flowering and number of primary branches. The path coefficient analysis indicated that 1000 seed weight exhibited maximum positive direct effect with seed yield (0.741) while others had a low direct effect. The significant positive correlation of number of secondary branches and harvest index with seed yield was mainly due to indirect effect via 1000 seed weight indicating that 1000 seed weight is the most important trait for the improvement of grain yield in linseed as per the present study.

scholarly journals Estimation of heterosis for some traits in Linseed (Linum usitatissimum L.) in Central Uttar Pradesh

2020 ◽  
Vol 5 (01) ◽  
pp. 94-100
Author(s):  
Rishi Pal ◽  
Y. P. Malik
Keyword(s):  
Seed Yield ◽  
Linum Usitatissimum ◽  
Oil Content ◽  
Uttar Pradesh ◽  
Flowering Duration ◽  
Linum Usitatissimum L ◽  
Days To Maturity ◽  
Maturity Period ◽  
The University ◽  
Dough Stage

The estimation of economic for parent heterosis Linum usitatissimum L. genotypes 11 characters namely, Flowering duration (Days), Bud length (mm), Bud width (mm), Sepal thickness (mm), Maturity period (Days), Dough stage bud fly infestation (%), Capsules/ plant, Grains/ capsule, Yield/ plant (gm), Test weight (1000) grains and Oil content % were studied for testing the significance of differences among the treatments on experiment conducted at Oilseed Research Farm, Kalyanpur, of the university Kanpur during rabi 2012-13. The heterosis over economic parent (Neelum) showed positive and significant results. Crosses are JRF-5×Neela, GS-234 × IC-15888, GS-234 × JRF-5, EC-1424×GS-234, EC-1424×IC-15888, EC-1424×JRF-5, EC-1424×Neela, GS-234× Neela, IC-15888×JRF-5, IC-15888×Shekhar, IC-15888×Neela, JRF-5×Shekhar, Shekhar×Neela and IC-15888×Neelum. sepal thickness, (JRF-5×Shekhar, JRF-5×Neelum and JRF-5×Neela). Days to maturity, (EC-1424× Shekhar). Dough stage bud fly infestation, EC-1424×IC-15888, EC-1424×JRF-5, IC-15888×Neelum, Shekhar×Neelum, IC-15888×JRF-5, GS-234×Neela, JRF-5×Neelum and Neelum×Neela. Capsule per plant, (GS-234×Shekhar, IC-15888×Shekhar, IC-15888×Neela and JRF-5 × Shekhar) Oil content and EC-1424×IC-15888, IC-15888×Neelum, JRF-5×Neelum, Shekhar× Neelum, IC-15888×JRF-5 and Neelum×Neela. for Seed yield per plant.

scholarly journals Characterisation and evaluation of morphological trials, biological features and seed yield of 23 flax accessions (Linum usitatissimum L.) of different geographical origins

2018 ◽  
Vol 64 (4) ◽  
pp. 1-13 ◽  
Author(s):  
Grażyna Silska ◽  
Jan Bocianowski
Keyword(s):  
Genetic Resources ◽  
Seed Yield ◽  
Linum Usitatissimum ◽  
Biological Diversity ◽  
Cannabis Sativa ◽  
Field Trials ◽  
Convention On Biological Diversity ◽  
Biological Features ◽  
Linum Usitatissimum L ◽  
Lateral Branches

Summary Introduction: The Institute of Natural Fibres and Medicinal Plants (INF&MP) is involved in the protection of the genetic resources of flax (Linum usitatissimum L.) and hemp (Cannabis sativa L.). In 1998–2000, the INF&MP conducted research titled “Collection and evaluation of flax and hemp cultivars and ecotypes”. Poland participates in the programme, financed by the Ministry of Agriculture and Rural Development because our country has signed the Convention on Biological Diversity. Objective: The objective of the research was the evaluation of the genetic resources of 23 accessions of flax. The characteristics data for flax accessions are presented according to traditional methodology and according to the methodology for developing the International Flax Data Base. Methods: Field trials were carried out in 1998–2000 in the experimental station in Wojciechów, located in the Opolskie region. The objective was to evaluate the morphological traits, biological features and seed yield of 23 accessions of flax. The research included the following genotypes of Linum usitatissimum L. according to type of use: 12 linseed varieties, three landraces, one accession of unknown type of use, six fibre varieties and one genotype of both types of use. Results: The total plant length of Linum was short for 12 accessions of flax, medium short (7) and medium (4). The technical length was short (17 accessions), medium short (3) and medium (3). The stem thickness for all accessions was medium, i.e. between 1.2 and 2.0 mm. The panicle length was short (12 accessions), medium (10) and long (1). A number of primary lateral branches of the stems of all flax accessions was medium (4–8 branches). The 1000 seed weight was low for 21 accessions of flax and very low in two genotypes: Currong and UKR 97 104. The size of the corolla (flower) was small (9), medium (12) and large (2) – varieties: Martin and Maxigold. The petal colour of the corolla was blue (11), light blue (8) and white (4) – Crystal, Hella, Kreola, Achay. Conclusions: Morphological characterisation of the stamen showed that accession K-1390 was segregating because the anther colour was bluish and greish. The highest resistance to lodging was observed for Abby, Peak and Olinette. The following accessions of flax were very resistant to Fusarium: Martin, UKR 97269, Kijewskij and Ukraińskij 3; resistant to Fusarium: Abby, Peak, Olinette, Crystal, Gold Merchant, Currong and Ukraińskij 2. The following varieties were very susceptible to Fusarium: Hella, Kreola, Maxigold and Achay. These varieties should not be used for cross breeding. The best average seed yield in 1998–2000 in Wojciechów was found in the following accessions of flax: Abby (191%), Gold Merchant (162%), Currong (161%), Olinette (151%), PEAK (148%), UKR 97269 (148%), Crystal (138%), Ukraiński 3 (132%), Martin (130%), Pacific (110%) and Ukraiński 2 (103%). These varieties are particularly valuable for flax breeders.

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