Nutritive value of two strains of Canadian utility wheat, Glenlea and Pitic 62, was compared with those of Canadian No. 1 feed barley and of American yellow corn by feeding these cereals to laying hens.
Crude protein in Canadian utility wheats, i. e., Glenlea and Pitic 62, was 15, 27 and 14.94%, respectivly, which was higher than that in Canadian No. 1 feed barley and yellow corn. Total digestible nutrients in Pitic 62 wheat and Canadian No. 1 feed barley was almost identical, being about 75%, but that of Glendea wheat was higher than those of them and almost equal to that of yellow corn, being 79.6%.
No significant difference in egg production, egg weight, feed intake and feed conversion (feed/egg) was observed among the hene fed one of four cereals on iso-caloric and iso-nitrogenous basis.
Yolk color of the eggs laid by the hens fed wheats and barley was between 5-6 by Roche color fan, which was significantly lower than 8 of the egg yolk laid by the hens fed yellow corn.

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Nutritive value of two strains of Canadian utility wheats, i. e., Glenlea and Pitic 62, was compared with those of Canadian No. 1 feed barley and of American yellow corn, feeding these cereals to meat-type one-day-old chicks for 8 weeks.
Crude protein of Glenlea and Pitic 62 wheats, Canadian No. 1 barley and yellow corn was determined to be 15.3, 14.94, 9.5, and 8.8%, respectiwely, and their total digestible nutrients was estimated to be 79.6, 75.2, 75.1 and 78.5%, respectively. When these wheats and barley were mixed in place of yellow corn in the control diet iso-nitrogenously and iso-calorically, body weight gain and feed conversion (feed/gain) of the chicks and melting points of abdominal fat of the chicks fed the diet containing yellow corn, barly or 2 strains of wheat were almost identical.
Feed intake of the broiler fed barley was higher than those of yellow corn, and significant difference was observed between the two.

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Male Japanese quail were raised under 14-hr (5:00-19:00) light per day for 4 months from the day of hatch, and their gonadotropic activities of the anterior lobes of pituitary at various times during a 24-hr period were measured using a bioassay method based on ³²P-uptake by chick testes. A peak of the gonadotropic activity was found at the end of light period. When the time of onset of light was shifted from 5:00 to 17:00 and the birds were kept for 2 weeks, the peak shifted to a time close to the end of the new light period. When the length of the light period was reduced to 8 hours and the birds were kept for 16 weeks, the peak disappeared.

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The red cells, sera, muscles and eleven internal organs from four strains, one wild (WM) and three domestic (DN, DS and DM), of Japanese quails were examined for esterase-D isozymes by the use of starch gel electrophresis.
Three bands were detected in a region (Fig. 1). No difference was found among the zymograms from erythrocytes, muscles and various internal organs.
The results of mating experiment indicated that these three bands were controlled by codominant autosomal alleles symbolized E_S-D^F and E_S-D^S (Table 2). Three domesic strains differed in the frequency of these alleles, e. g. the frequency of E_S-D^F was 0.264 in DN, 0.275 in DS and, 0.568 in DM. The differences from 0.5 were statistically significant in the domestic straims and not sigificant in the wild strain (Table 3).

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We have examined the effect of feed restriction on layers during raising or laying stage and through both stages. The experiment was carried out with strain cross of White Leghorn, Crossbred of Rhode Island Red _??__??_ x White Leghorn _??__??_ and strain cross of Rhode Island Red hatched on September 9, 1969. Numbers of layers used in this experiment were 224 of the three breeds. The layers were fully fed until 70 days of age. Each breeds were divided into 4 restricted feeding programs.
Treatment No. 1. Fed ad libitum thoughout 0-519 days of age.
Treatment No. 2. Fed ad libitum during 0-154 days of age, thereafter feed restriction rate was 90% of full diet of the No. 1 group during 155-519 days of age.
Trestment No. 3. Fed skip-a-day feeding in two days during 71-154 days of age, thereafter ad libitum during 155-519 days of age.
Treatment No. 4. Fed skip-a-day during 71-154 days of age, thereafter ad libitum during 155-182 days of age, and during 183-519 days of age feed restriction rate was 90% of full diet of the No. 3 group.
Feed comsumption during 71-154 days of age of No. 3 and 4 groups was 61.5% that of No. 1 and 2 groups, and average body weight at 154 days of age was 70.6% that of No. 1 and 2 groups. Average rate of raising of No. 1 and 2 groups was 99.3% and that of No. 3 and 4 groups was 97.9%.
By means of the feed restriction during raising period, the hen-day egg production of No. 3 and 4 groups was 69.6%, and it was 1.7% lower than that in the No. 1 and 2 groups, therefore the egg production per bird per day was 39.2g, and it was 0.6g lower than that in the No. 1 and 2 groups. Feed intake per bird per day of No. 3 and 4 groups during laying period was 113.5g, and it was 2.0g more than that in the No. 1 and 2 groups. Therefore the feed conversion ratio of No. 3 and 4 groups 2.90, and it was 0.1 more than that in the No. 1 and 2 groups.
By mesns of the feed restriction during laying period, the hen-day egg production of No. 2 and 4 groups was 69.9%, and it was 1.1% lower than that in the No. 1 and 3 groups. Therefore the egg production per bird per day of No. 2 and 4 groups was 38.9g, and it was 1.3g lower than that in the No. 1 and 3 groups. Feed intake per bird per day of the No. 2 and 4 groups was 103.7g, and it was 17.7g less than that in the No. 1 and 3 groups. Restricted feeding in laying period improved the feed conversion ratio by 0.36.
Crude profit per bird of No. 3 and 4 groups was 45 yen more than that in the No. 1 and 2 groups, and that in No. 2 and 4 groups was 169 yen more than that in the No. 1 and 3 groups. Average crude profit of three breeds was as follows, No. 1 group was 940 yen, 1, 137 yen in the No. 2 group, 1, 014 yen in the No. 3 group and 1, 154 yen in the No. 4 group. Crude profit of the No. 4 group was the highest the among groups, by means of the feed restriction throughout raising and laying periods, Whereas the value of the No. 1 group was the smallest among the groups, by means of full diet throughout raising and laying periods.

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Gross protein value and phosphorus availability of 4 kinds of yeast, which were produced by the four domestic companies and were used in the multi-generation feeding experiment, were estimated by biological assay procedures recommended by this laboratory in the previous papers. Total 833 chicks were used in the assays.
Gross protein values of four yeasts tested were between 44 and 66, when no amino acid was supplemented. However, those were surprisingly improved to be 89-103 by simply supplementing DL-methienine at the level of 0.9-1.3% to the air-dried yeast.
Phosphorus availability of the yeast was satisfactory, being close to 100, except that of Yeast C, which was 59% in average.
The results of the estimation of gross protein value and phosphorus availability as well as available energy reported in this and previous papers reveal that yeast grown on n-paraffin is good source of protein and phosphorus as well as energy for poultry, if adequate DL-methionine is supplemented.

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[in Japanese]

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[in Japanese]

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