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Assessment of the accuracy of selected models used to estimate the heritability coefficient in a cattle population

100%

Sobek Z., Rozanska-Zawieja J., Siatkowski I., Szabelska-Beresewicz A., Zyprych-Walczak J.

Animal Science and Genetics

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2022

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tom 18

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nr 1

2

The moments of the estimator of the heritability coefficient in a broad sense in a balanced mixed model

75%

Domagala D.

Colloquium Biometryczne

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2004

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tom 34

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Coefficients of heritability for fattening and slaughter traits included in a modified performance testing method

63%

Szyndler-Nedza M., Tyra M., Rozycki M.

Annals of Animal Science

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2010

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tom 10

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nr 2

117-125

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Micropropagation of wild chicory (Cichorium intybus L. var. silvestre Bisch.) from leaf explants

63%

Dolinski R., Olek A.

Acta Scientiarum Polonorum. Hortorum Cultus

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2013

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tom 12

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nr 6

Cichorium intybus is edible, medicinal and forage plant. The pharmaceutical raw materials were obtained from wild chicory (var. silvestre). Currently, farmers are increasingly assume plantations of wild chicory, and breeders are attempting to produce cultivars for medicinal purposes. In the modern breeding of chicory important feature is the ability to clonal propagation in vitro culture. The aim of our study was to assess capacity of natural population of wild chicory for plant regeneration from leaf explants. In the first was examined the effect of 16 combinations of various concentrations of IAA and 2iP on the regeneration of shoots from leaf explants (0.5 cm2 ). After that, 25 plants were propagated on the medium which was found as optimal. Then, their callus growth and shoots regeneration capacities were compared. Later on, was examined the effect of various IAA concentrations on the rooting of shoots. The majority of the shoots was regenerated from callus but direct organogenesis was also observed (8%). Shoot regeneration was found to be the most efficient on MS medium containing 0.5 mg dm-3 IAA and 4 mg dm-3 2iP – 97% of the explants produced shoots, while the average number of shoots was 15.5. The amount of callus was found to be a highly heritable trait (h2 = 0.83). Lower the heritability coefficients were obtained for the number of shoots per explant (0.55) and the average shoot weight (0.40). The wild chicory shoots rooted easily. The number and weight of roots increased with the increasing concentration of IAA.

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Zmienność cech użytkowych rzepaku ozimego

51%

Bujak H., Kotecki A., Kozak M., Malarz W.

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin

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2006

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nr 240-241

223-229

W sezonie wegetacyjnym 2003/2004 w Pawłowicach koło Wrocławia, prowadzono dwuczynnikowe doświadczenia w układzie pasów prostopadłych („split-block”), w których badano w kolejności: I. zróżnicowane technologie uprawy (A — standardowa, B — intensywna) i II. odmiany rzepaku ozimego (Baldur F1, Californium, Capio, Carina, Cazek, Contact, Digger, Kronos F1, Liclassic, Lirajet, Lisek, Mazur F1Z, Pomorzanin F1Z, Titan F1, Viking). W technologii standardowej stosowano nawożenie (kg•ha-1): 140 N, 60 P2O5 i 120 kg K2O oraz zwalczanie chwastów i szkodników w podstawowym zakresie zalecanym przez IOR Poznań, natomiast technologia intensywna (B) charakteryzowała się dodatkowo zwiększonym o 50 kg·ha-1 nawożeniem azotowym, dwukrotnym stosowaniem fungicydów (w fazie opadania płatków korony i w fazie dojrzałości zielonej łuszczyny) oraz dolistnym dokarmianiem mikroelementami (w fazie pąkowania). Najwyższym współczynnikiem odziedziczalności odznaczał się plon nasion (0,79), a następnie kolejno niższym wydajność tłuszczu surowego (0,78), masa nasion w łuszczynie (0,76), zawartość tłuszczu surowego (0,74) i wydajność białka ogółem (0,74). Najniższym poniżej 5% współczynnikiem zmienności charakteryzowały się następujące cechy: zawartość tłuszczu surowego w nasionach, masa 1000 nasion, liczba nasion w łuszczynie i zawartość białka ogółem. Najwyższe plony nasion, tłuszczu surowego i białka ogółem uzyskano z odmiany Viking, która miała najwięcej łuszczyn na roślinie, nasion w łuszczynie i masę nasion w łuszczynie oraz zwierała najwięcej tłuszczu surowego w nasionach.

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Wielowymiarowa ocena roznorodnosci fenotypowej w kolekcji zasobow genowych truskawki [Fragaria x ananassa DUCH.] Czesc I. Analiza zmiennosci

45%

Ukalska J., Madry W., Ukalski K., Masny A.

Zeszyty Problemowe Postępów Nauk Rolniczych

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2007

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tom 517

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nr 2

749-757

In the paper a phenotypic variation among 117 genotypes (cultivars and clones) in a strawberry collection from the Research Institute of Pomology and Floriculture in Skierniewice was assessed using quantitative genetic parameters and PCA. The variation was studied for nine vegetative, productive and disease susceptibility characters, observed in a rate scale (1 to 9 or 1 to 7) assuming that larger scores show a larger level of the defined characters. Some vegetative characters as well as those describing fruit yielding and susceptibility to the most important strawberry diseases were considered. Data were collected in a trial observed within three years (2001-2003). They were arranged in an incomplete two-way classification genotypes by years. Variance components were estimated for each trait separately using the REML method for a random ANOVA model of a two-way classification. Coefficients of heritability of three-year phenotypic means were estimated on the basis of the variance components. Estimates of genotypic values were obtained using the best linear unbiased predictor (BLUP). To analyze the phenotypic diversity of the germplasm collection principal component analysis was used on the basis of the BLUP’s. The obtained heritability coefficients were quite high (over 0.6) except for fruit taste, leaf spot susceptibility and leaf scorch susceptibility (0.36-0.44). The highest positive values of correlation coefficients between the first principal component (PC) and plant vigour, fruit size and fruit yield were obtained. The second PC was strongly correlated with the leaf scorch susceptibility, and the third PC with the fruit taste.

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Zmiennosc i odziedziczalnosc cech uzytkowych linii wsobnych kukurydzy [Zea mays L.]

38%

Kadlubiec W., Lewandowska S., Kuriata R.

Zeszyty Problemowe Postępów Nauk Rolniczych

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2007

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tom 517

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nr 1

355-360

17 inbred lines of maize (K335, K352, K254, K247, K233, K285, K299, K369, K354, K370, K112, K324, K231, K154, K296, K376, K382) of different origin were tested. The lines came from American, French, German, Hungarian hybrids; and also from single and interlines hybrids of Polish origin. 5 plants of each line were chosen randomly. The following traits were measured: length and thickness of cob, number of grain rows per cob, cob weight, grain weight, number of grains per cob. The results were statistically analyzed. Analysis of variance by cross classification method for two factors was conducted. Cluster analysis of cluster single method based on Euclidian distance was used to estimate the association of lines. The analyzed lines were divided into groups according to their origin.

Ograniczanie wyników

Assessment of the accuracy of selected models used to estimate the heritability coefficient in a cattle population

The moments of the estimator of the heritability coefficient in a broad sense in a balanced mixed model

Coefficients of heritability for fattening and slaughter traits included in a modified performance testing method

Micropropagation of wild chicory (Cichorium intybus L. var. silvestre Bisch.) from leaf explants

Zmienność cech użytkowych rzepaku ozimego

Wielowymiarowa ocena roznorodnosci fenotypowej w kolekcji zasobow genowych truskawki [Fragaria x ananassa DUCH.] Czesc I. Analiza zmiennosci

Zmiennosc i odziedziczalnosc cech uzytkowych linii wsobnych kukurydzy [Zea mays L.]