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    Wyświetlanie 1-4 z 4
    Tytuł:
    Response of oil and protein content to seed size in cotton(Gossypium hirsutum L., cv. Sahel).
    Autorzy:
    Pahlavani, M. H.
    Miri, A.A.
    Kazemi, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2199173.pdf
    Data publikacji:
    2009-06-21
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    cotton
    emergence
    germination
    oil
    seed
    Opis:
    This study was designed to identify the response of oil and protein content to non-heritable variation of seed size in cotton (Gossypium hirsutum L.). The experiment was conducted at Gorgan University of Agricultural Sciences, Gorgan, Iran in 2005. The results showed that germination and emergence increased linearity with seed size and R2 of these relationships were 92 and 89%, respectively. This means that larger seed had higher potential of germination and emergence. Also, there was a strong linear relationship between seed weight and oil content. Seed weight provided a better indication of oil content (R2=0.78) than protein content (R2=0.43). There are no considerable relationship between seed size and protein content of seed...
    Źródło:
    Plant Breeding and Seed Science; 2009, 59; 53-64
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selection-based heritability of resistance to Pythium ultimum in safflower
    Autorzy:
    Nikmanesh, Elham
    Pahlevani, Mohammadhadi
    Razavi, Seyed Esmaeil
    Powiązania:
    https://bibliotekanauki.pl/articles/2199691.pdf
    Data publikacji:
    2012-08-20
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    additive
    emergence
    genotype
    seed
    zoospore
    Opis:
    Damping-off disease caused by Pythium ultimum can kill both germinating seeds and young seedlings and cause considerable damage in safflower cultivation. An estimation of heritability lets safflower breeders determine the most effective method for improving seedling emergence in soils  infected  with P. ultimum, the causal agent of seed rot and damping-off. Two cycles of selection were performed to estimate the realized heritability of resistance to the pathogen in five safflower populations. Undamaged seedlings were selected as resistant individuals and were kept to produce seed. The results showed that selection for two consecutive generations increased the emergence of seedlings in Pythium-infected soil from 46 to 53 %. The heritability estimates varied between 1.72 and 77.66 % over the genotypes and environments, in inverse proportion to the severity of the disease. Estimates of heritabilities showed that genes conferring resistance to P. ultimum in safflower are highly heritable and would respond to selection breeding, particularly in some of the studied genotypes, like Isfahan and Zarghan259. However,  different breeding methods must be explored for other genotypes.
    Źródło:
    Plant Breeding and Seed Science; 2012, 66; 109-118
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Priming treatments for improvement of germination and emergence of cotton seeds at low temperature
    Autorzy:
    Cokkizgin, Hatice
    Bölek, Yüksel
    Powiązania:
    https://bibliotekanauki.pl/articles/2199641.pdf
    Data publikacji:
    2015-06-20
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    cotton
    emergence
    germination
    low temperature
    PGR
    priming
    Opis:
    Early sowing in cotton is important for obtaining a high and qualiy yield. Since cotton prefers high temperatures to have a good stand establisment, this work is important to determine better performing genotypes or to promote germination and emergence at low temperatures (<20°C). This research aimed to increase seed germination rate and seed vigour under cold stress conditions. Two cotton genotypes belonging to G. hirsutum L. species (Aydin-110 and Paymaster-2379) were primed with PEG-6000 (200, 300, 400 giL), KN03 (2, 3, 4%), KH2P04 (0.3, 0.4, 0.5 M), NaCl (2, 3, 4%) or Mannitol (2, 4, 6%) to determine the best priming medium and its best amount. After priming, seeds were germinated in germination cabin at cold (18°C) and warm (30° C) temperatures and some characteristics (germination rates, radicle length, hypocotyl length and seedling length) were analyzed. Priming with KN03 (4% or 2%) was found to result in the highest germination rates in both cotton genotypes. The seeds of the genotypes were also primed with 5-aminolevulinic acid (ALA) (1, 10, 25 mg/L), gibberellic acid (GA3) (100, 250, 500 µM), methyljasmonate (MeJA) (1, 3, 5 µM),acetylsalicylic acid (ASA) (1, 10, 100 µM) or kinetin (1, 5, 10 mg/L) added to KN03 (4%) medium to choose the most effective plant growth regulator (PGR) application and its dose. PGRs were observed to have reverse effects on germination rate. Finally, emergence test was conducted with KN03 (4%) and KN03 (2%) using metabolic chill test, and some traits (radicle length, radicle weight, hypocotyllength, hypocotyl weight, seedling length, seedling fresh weight and seedling dry weight) were examined. Our results suggested that priming with KN03 (2%) might be an effecient way to have vigourous cotton plants under the cold stress.
    Źródło:
    Plant Breeding and Seed Science; 2015, 71; 121-134
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of Seed Nut Size as Index of Selection for Superior Seed Quality Attributes in Two Biotypes of Cashew (Anacardium Occidentale)
    Autorzy:
    Kehinde, T. O.
    Adebisi, M. A.
    Alegiledoye, A. O.
    Shofuyi, K. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2199645.pdf
    Data publikacji:
    2015-12-20
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    cashew
    seed vigour
    emergence
    seed nut size
    Opis:
    Quality seed nuts are germane to propagation of the cashew plant. Seed nut fraction and genotypes have been identified to influence seed quality of crop plant. Unexpectedly, seed size effect has not been well documented in Brazilian and local biotypes of cashew grown in Nigeria. An experiment was initiated to investigate the effect of three nut sizes and two biotypes of cashew on seed quality (physical and physiological) traits. Seed nut were collected from three cashew plants of the same age of each of the biotypes and were allowed to stay for 60 days after collection. The experiment was carried out in a factorial arrangement laid out in a completely randomized design with three replicates using two factors (nut size and biotypes) in 2011 cropping season in both laboratory and screen house tests. Data were collected on physical characters such as seed length, seed width, 100 seed weight and seed imbibition rate while physiological characters were seed germination and early vigour traits. Data obtained were analysed statistically using Tukey HSD test at 5% probability level. The result revealed that some of the characters were significantly different from one another. Seed nut fraction and biotype had considerable effect on seed length, seed width, seed imbibition rate and 100 seed weight. The two factors (nut size and biotype) interaction had profound effect on seed width only. On seed physiological quality, biotype effect was significant on seedling fresh and dry weights and seedling growth rate whereas seed nut size had considerable effect on seed germination, seedling vigour index, seedling fresh weight and seedling growth rate. The interaction effect of nut size and biotype recorded significant effect on the above four characters. Brazilian biotype had superior physical characters (seed length, width and weight) but with low imbibitions rate while medium and large nut sizes gave the highest seed germination and seedling vigour. Also, medium and large nuts had the highest seedling fresh weight whereas the highest seedling growth rate was recorded with small size seed. However, large, medium and small nut sizes of local biotype had the highest imbibition rate, whereas small, medium and large nut size of Brazilian biotype gave the highest 100 seed weight. On seedling emergence, large nuts of local biotype recorded the highest seedling emergence and seedling vigour index. Medium nuts of the two biotypes of cashew are recommended for cashew seed multiplication. Further research on physiology of cashew nut sizes during storage and osmo and hydro priming treatment effect are necessary and therefore advocated.
    Źródło:
    Plant Breeding and Seed Science; 2015, 72; 69-81
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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