Ii Youduo 57 (Rice)
The main results are as follows: (1) Variety source: it is a medium indica late maturing hybrid combination made by Rice Gaoliang Institute of Sichuan Academy of Agricultural Sciences using II--32A as female parent and Duohui 57 as male parent.
(2) characteristics: the whole growth period is 150 days, which is about 3 days longer than that of Shanyou 63. The combination has the advantages of vigorous growth, compact plant type, good late ripening color, 150 grains per ear, seed setting rate of 87.2% and 1000-grain weight of 27.0 g. The eating quality was similar to that of the control, and the processing appearance quality was better than that of the control. the results showed that the resistance of leaf blast was 5-7, that of neck blast was 1-5, and the resistance was better than that of Shanyou 63.
(3) yield performance: in the provincial and regional trials in 1994-1995, the average yield per mu was 563.5 kg and 544.80 kg, an increase of 1.69% and 1.182% over the control Shanyou 63, and an average yield of 554.18 kg per mu in two years, an increase of 1.70% over the control. In the 1995 production test, the average yield per mu in the five pilot projects was 547.88 kg, 5.05% higher than that of the control.
(4) suitable planting area: suitable for planting in medium rice areas below 800 meters above sea level in our province.
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Ii Youxiang 13 (formerly known as Neixiangyou 13) (Rice)
Characteristics: this variety belongs to indica three-line hybrid rice. the average growth period of one-cropping middle rice in the upper reaches of the Yangtze River is 156.8 days, which is 3.6 days later than that of Shanyou 63. The stem, leaf rim and leaf node glume tip are all purplish red. The plant type is moderate, the cold tolerance is medium, the grain weight per ear is more coordinated, and the color change is good at ripening stage. The number of effective ears per mu is 160000 ears, plant height is 116.4 cm, ear length is 25.6cm, total grains per ear is 161.6, seed setting rate is 81.8%, and 1000-grain weight is 27.9g. Resistance:
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Ii you 98 (Rice)
The applied variety IIyou 98 (formerly Kangyou 98) is an indica hybrid rice, which belongs to OryzasativaL in plant taxonomy. II you 98 was bred by crossing Taichung local No. 1 (TN1) as female parent and DV85 as male parent. The main economic characters were improved, but the intermediate resistance source TD; still carrying Xa-7 gene was crossed with TD as female parent and Minghui 63 as male parent. The selected characters were similar to Minghui 63, but had good recovery, strong combining ability and matched with II-32A.
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