Wyniki wyszukiwania - Biblioteka Nauki

1

Inheritance of leaf rust resistance in wheat lines carrying Aegilops speltoides Tausch. translocation in Chinese spring background

100%

Bansal U. K. , Saini R. G. , Khanna R.

Journal of Applied Genetics

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2008

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tom 49

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nr 2

141-145

EN

The genetic basis of seedling and adult-plant leaf rust resistance was analysed in wheat lines CS 2A/2M 4/2 and CS 2D/2M 3/8, which are reference lines for the leaf rust resistance gene Lr28. Some seedlings of CS 2A/2M 4/2 were susceptible to Indian Puccinia triticina (Pt) pathotypes 77-1,77-2 and 77-5. These susceptible seedlings exhibited resistance at the adult-plant growth stage. In contrast, CS 2D/2M 3/8 showed resistance to all Pt pathotypes both at the seedling and adult-plant growth stages. The analysis of inheritance in the susceptible plants of CS 2A/2M 4/2 (CS 2A/2M 4/2 APR selection) and CS 2D/2M 3/8 against Pt 77-5 (the frequently occurring Pt pathotype from the Indian subcontinent), indicated that line CS 2D/2M 3/8 was fixed for a dominant gene, presumed to be Lr28, whereas line CS 2A/2M 4/2 was heterogeneous for Lr28. The adult-plant resistance in the CS 2A/2M 4/2 APR selection was conferred by an unknown recessive gene.

2

Transport and accumulation of ions in two spring wheat lines differing in salt tolerance

100%

Ashraf M. , Khanum A.

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tom 22

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nr 2

3

Yield of winter durum wheat (Triticum durum Desf.) lines in condition of different protection level of plants

80%

Rachon L. , Szumilo G.

Acta Scientiarum Polonorum. Agricultura

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2009

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tom 08

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nr 3

EN

The paper deals with evaluating the yield and yield structure elements of winter durum wheat lines (Triticum durum Desf.) under conditions of varied levels of chemical protection. The field experiments were carried out in 2006-2008 on the Experimental Farm Felin, University of Life Sciences, Lublin. Examinations involved 3 lines of durum wheat (STH 716, 717, 725) achieved from Plant Breeding Station in Strzelce as well as common wheat Tonacja cv. for comparison. The second factor consisted of 2 levels of chemical protection: I – minimum (seed dressing Oxafun T 75 DS/WS and herbicide Chwastox Trio 540 SL); II – complex (seed dressing, herbicides Puma Uniwersal 069 EW and Chwastox Trio 540 SL, fungicide Alert 375 SC, growth regulator Stabilan 750 SL and insecticide Decis 2,5 EC). Obtained results allowed for concluding that when comparing with minimum protection, the increase in wheat grain yields by 1.08 t·ha⁻¹ was recorded on complex-protected treatments, regardless of compared lines and varieties. Lower yield of durum wheat as compared to common wheat resulted first of all from lower spike density per area unit. A positive influence of chemical protection on spike number and grain number per spike was observed. Durum wheat lines were characterized by high grain vitreousness.

PL

W pracy dokonano oceny plonowania i elementów struktury plonu 3 linii ozimych pszenicy twardej Triticum durum Desf. w warunkach zróżnicowanego poziomu ochrony chemicznej. Badania polowe przeprowadzone w latach 2006-2008 objęły linie STH 716, 717 i 725, które otrzymano w Stacji Hodowli Roślin w Strzelcach i odmianę pszenicy zwyczajnej Tonacja. Stosowano 2 poziomy ochrony chemicznej: I – ochrona minimalna (zaprawa nasienna Oxafun T 75 DS/WS i herbicyd Chwastox Trio 540 SL), II – ochrona kompleksowa (zaprawa nasienna, herbicydy Puma Uniwersal 069 EW i Chwastox Trio 540 SL, fungicyd Alert 375 SC, regulator wzrostu Stabilan 750 SL i insektycyd Decis 2,5 EC). W porównaniu z ochroną minimalną na obiektach chronionych kompleksowo otrzymano wzrost plonu ziarna pszenicy o 1,08 t∙ha⁻¹, niezależnie od porównywanych linii i odmian. Średni plon ziarna badanych linii pszenicy twardej – 5,82 t·ha⁻¹ należy uznać za dobry, jednak w porównaniu z pszenicą zwyczajną stanowił tylko 66% jej plonu. Niższe plonowanie pszenicy twardej w porównaniu z pszenicą zwyczajną wynikało przede wszystkim z niższej obsady kłosów na jednostce powierzchni. Stwierdzono korzystne oddziaływanie ochrony chemicznej na liczbę kłosów oraz liczbę ziarn z kłosa. Linie pszenicy twardej wyróżniały się wysoką szklistością ziarna.

4

Production and evaluation of doubled haploid wheat lines

80%

Pauk J. , Kertesz Z.

Journal of Applied Genetics

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1997

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tom 38

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nr 4

EN

F₁, F₂ populations as well as F₃ and F₄ wheat lines coming from more than 300 cross combinations have been used for androgenic wheat studies and more than 5000 haploid plants were produced. Promising doubled haploid lines were tested together with lines produced in the conventional way in yield trials. The two best doubled haploid lines overyielded the standard. On the basis of results related to the general combining ability it is advisible to cross parents with a good combining ability for characters such as high percentage of responding anthers and embryo/callus induction with parents indicating a good combining ability for green plant production. In this way ideal lines can be obtained for doubled haploid production.

5

Cytogenic stability of wheat lines [Triticum aestivum L.] with added and substituted chromosomes of rye [Secale cereale L.]

80%

Chrzastek M.

Acta Biologica Cracoviensia. Series Botanica

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2003

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tom 45

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nr 2

EN

Transmission of added and substituted rye chromosomes through generations and behavior of chromosomes at meiosis was analyzed. Among the addition lines, chromosome 7R was most often transmitted and 6R most rarely. In substitution line 1B/1R, no elimination of rye chromosomes was observed in any generation. The tested lines differed from wheat in the behavior of chromosomes at meiosis. The rye and wheat chromosomes interacted during meiosis. The added rye chromosomes influenced bivalent shape and univalent frequency at metaphase I, the number of delayed chromosomes and chromatid bridges at anaphase I, and the occurrence of micronuclei in tetrads. In the majority of lines the frequency of open bivalents and univalents was higher than in ‘Grana’ wheat and ‘Dańkowskie Złote’ rye. Rye chromosomes occurred more frequently as univalents than wheat chromosomes did. Neither multivalent associations nor homoeologous pairing were observed. The studied lines had good cytogenetic stability.