barley

mshtaya's picture

Identification of QTL Involved in Resistance of Barley Seedling to Scald (Rhynchosporium secalis)

Journal Title, Volume, Page: 
Hebron University Research Journal (A). Vol.(5), pp.(49 – 62)
Year of Publication: 
2011
Authors: 
Munqez J. Y. Shtaya
Department of Plant Production and Protection, Faculty of Agriculture, An-Najah National University
Current Affiliation: 
Department of Plant Production and Protection,Faculty of Agriculture and Veterinary Medicine, An Najah National University, Nablus, Palestine
Fernando Martínez
Universidad de Sevilla, Dpto, Ciencias Agroforestales, Spain
Preferred Abstract (Original): 
A population of 103 recombinant inbred lines (RILs) of barley, that were developed from the cross L94x’Vada’ was evaluated at seedling stage for resistance against scald (Rhynchosporium secalis) in a sporeproof air-conditioned glasshouse. Two isolates of R. secalis were used: B9 and 13-13. Both isolates were collected in fields at SCRI (Scottish Crop Research Institute) near Dundee, Scotland, UK. Under glasshouse conditions, two quantitative trait loci (QTLs) for partial resistance (PR) to scald were identified.
One QTL (Rrsq1) was detected on chromosome 3 (3H) for latency period and lesion length only against B9 isolate, whereas the other QTL (Rrsq2, on chromosome 7H) was identified for lesion length of both isolates. Rrsq1 was mapped at a region where a QTL was detected, using the same population, for partial resistance to scald under field conditions whereas Rrsq2 was mapped at a similar position as the locus Rrs2 for scald resistance. These cases of co-location of QTL with major genes, not very common, may suggest that some QTL are actually alleles of known major resistance genes.
aboomar57's picture

Comparison and Evaluation of Awassi Lambs Fattening Systems in Palestine

Journal Title, Volume, Page: 
Egyptian J. Nutrition and Feeds, 5 (I): 23 - 29
Year of Publication: 
2002
Authors: 
Jamal ABO OMAR
An- Najah National University, Nablus, Palestine
Current Affiliation: 
Faculty of Agriculture and Veterinary Medicine, Department of Animal Production and Health, An Najah National University, Nablus, Palestine
W. Hainmac
Ministry of Agriculture, Palestine
R. Othman
H. Shanti
AI Azhar University, Gaza, Palestine
Preferred Abstract (Original): 

This research was conducted to investigate the performance of Awassi lambs in the two fattening systems in Palestine. Both systems are based in specific locations in the country with variable outcomes. A total of sixty Awassi lambs were used in the experiment. Lambs were divided into two groups of thirty lambs in each. Lambs in the first group were fed a concentrate ration similar to those fed in commercial fattening operations. Lambs in the second group were fed a barley-based diet (70% barley plus 30% legume roughage). Lambs were fed their rations for 70 days. Lambs were weighed at weekly basis. At day 42 of beginning of the feeding trial, a digestibility trial was conducted on eight of each group. A six days total collection of feed, feces and urine was performed. The performance of lambs fed the commercial fattening rations was much belter than lambs fed the barley based rations. This was observed from the performance parameters such as the total gain, average daily gain (278 vs. 146 g) and the feed conversion efficiencies. Lambs fed the commercial fattening rations had average feed efficiency of 5.5 kg while that of lambs the barley based rations was 8.8 kg. The cost of gain was significantly (P<0.05) higher in lambs fed the barley-based diets. The digestion trials showed that the dry matter and nutrients digestibility were higher for the commercial fattening rations compared to barley based rations.

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