The objectives of this study were to estimate changes in oil content, grain yield, percentage of broken plants and changes in yield components in the maize populations DS7u and YuSSSu. As estimations were performed at C0 and C9 for both populations, it was possible to observe changes occurring following long-term mass selection for high oil content. The synthetic population DS7u population was developed by recombination of 29 inbred lines of Yugoslav, Canadian and US origin. The synthetic population YuSSSu population is an Iowa Stiff Stalk Synthetic -BSS(R)C5. Progenies were derived according to the North Carolina Design II. Results indicated that nine cycles of selection led to statistically significant increase in oil content and statistically significant decrease for grain yield in both populations. Estimates of additive and dominance variances for grain oil content were highly significant in C0 and C9 of the population DS7u population. Dominance variance showed significance in the initial cycle of the population YuSSSu population, but it was not detected in the course of nine cycles of mass selection. Additive and dominance variances for grain yield were highly significant in both initial populations. Loss of significance did not result from selection, while the proportion of dominance vs. additive variance became greater. High narrow-sense heritability was detected for grain yield, oil content, moisture content, and cob percent in the initial cycles of both populations. Mass selection resulted in increased heritability for oil content and cob percent in the DS7u population and increased heritability for percentage of broken plants in the YuSSSu population. The strongest additive correlation between oil content and other traits was detected for grain moisture (r a = 0.90*) in the C9 of the DS7u population.
Choice of an appropriate donor of alleles for use in reselection programs of existing inbred lines of maize (Zea mays L.) is crucial to the success of such programs. Well‐adapted local populations or exotic improved populations might be used as donors to improve a target genotype. The objectives of this study were to: (i) evaluate U.S. and Yugoslav maize populations as donors of favorable alleles for improvement of two single cross hybrids, (ii) estimate Dudley's relationship values to determine which inbred parent should be improved, and (iii) compare four estimators of the value of populations: Dudley's minimally biased estimators (Lplμ*), minimum upper bound (UBND), predicted three‐way cross (PTC), and net improvement (NI). Lplμ*, UBND, PTC, and NI showed significant differences among donors for grain yield. The highest values of favorable alleles were detected in populations, which had already undergone some type of family‐based recurrent selection for grain yield. The evaluation of Dudley's relationships between donors and parents of elite hybrids generally agreed with pedigree information. The improvement of both hybrids should be done with populations EP1, BS12C8, BS26, and ZPSyn1. The population EP1 can be used for comparative improvement of all three traits in the hybrid B73 × Mo17. Simultaneous improvement of grain yield and ear length in the hybrid A82/9 × L155 can be achieved with several donor populations. Rank correlations among applied estimators were positive and generally highly significant. The largest correlation values for grain yield were detected between Lplμ* and PTC.
УНИВЕРЗИТЕТ У КРАГУЈЕВЦУ, ФАКУЛТЕТ ПЕДАГОШКИХ НАУКА, ЈАГОДИНА КАТЕДРА ЗА ХУМАНИСТИЧКЕ НАУКЕ ПОЛНЕ РАЗЛИКЕ И НАСИЉЕ МЕЂУ УЧЕНИЦИМА ОСНОВНОШКОЛСКОГ УЗРАСТА САЖЕТАК. Предмет овог рада је испитивање повезаности између полне припад-ности ученика основношколског узраста и њиховог односа према наси-љу у школи. Циљ рада је да се утврди степен повезаности између полне детерминисаности ученика основношколског узраста, њихове изложе-ности насиљу у школи и реаговања на само насиље. У овом раду полази се од основне претпоставке да пол ученика основних школа у значајној мери детерминише њихову изложеност различитим врстама насиља у школи и начине реаговања на насиље. У истраживању је примењен де-скриптивно-аналитички метод и анкетирање као истраживачка техни-ка. Добијени подаци су статистички обрађени и изражени фреквенци-јама и процентима. Истраживање је обухватило ученике завршног ра-зреда основних школа на територији општине Свилајнац, која се нала-1 zimarkovic@yahoo.com Ра9 је реализован у оквиру @ројекOа "ЕфекOи @римењене физичке акOивносOи на локомоOорни, меOаLолички, @сихо-социјални и вас@иOни сOаOус @о@улације Ре@уLлике СрLије" @о9 Lројем III 47015, а као 9ео @оO@ројекOа "ЕфекOи @римењене физичке акOивносOи на локомоOорни, ме-OаLолички, @сихо-социјални и вас@иOни сOаOус школске @о@улације Ре@уLлике СрLије" који се финансира о9 сOране МинисOарсOва за @росвеOу, науку и Oехнолошки развој Ре@уLлике СрLије -Циклус научних @ројекаOа 2011-2016. 2 При@ремљено у оквиру @ројекOа "О9рживосO и9енOиOеOа СрLа и националних мањина у @о:ра-ничним о@шOинама исOочне и ју:оисOочне СрLије" (179013), који се изво9и на УниверзиOеOу у Нишу -Машински факулOеO, а финансира :а МинисOарсOво за науку и Oехнолошки развој РС.Ра9 је @римљен 21. новемLра 2016, а @рихваћен за оLјављивање на сасOанку Ре9акције ЗLорника о9ржаном 1. марOа 2017.
Swiss chard (Beta vulgaris L. var. cicla) is a leafy vegetable highly consumed in many parts of the world as a very popular ingredient of different diets. The purpose of this study was to evaluate effects of soil properties and fertilization on yield, mineral composition, total phenolics, antioxidant and biological activity of Swiss chard. The mineral composition of Swiss chard was generally affected by soil properties. The fertilization at 50% of recommended level (110 kg ha -1 N, 90 kg ha -1 P 2 O 5 and 100 kg ha -1 K 2 O per season) affected negatively yield and on the other hand affected positively antioxidant activity, while fertilization at 150% of recommended level had a contrary effect. The available K in soil affected the yield positively. Total phenolics were in negative correlation with the yield. The positive relationship of total phenolics and content of Mn in chard was noticed. The greatest efficacy in human colorectal carcinoma cell lines was obtained by Swiss chard extract from plants fertilized at 150% of recommended level.
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