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Introduction to the Elite Hybrid Medium Indica Rice Variety Xieyou 136

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Xieyou 136 is a new medium indica hybrid rice combination bred by the Institute of Agricultural Sciences of the Lixiahe Region in Jiangsu. This combination is high-yielding and stable, with an average yield of about 650 kg per mu, more than 8% higher than that of Shanyou 63. Its full growth period is 145 days, with a well-coordinated panicle-grain structure and relatively high grain weight; generally 170,000-190,000 effective panicles per mu, 122.4-167.3 total grains per panicle, a seed-setting rate of about 90%, and a 1000-grain weight of more than 30 g. It has a compact plant type, strong tillering ability, good luxuriance, and strong lodging resistance; at maturity the stems remain green and the grains turn yellow, giving an excellent appearance at maturity; it is resistant to rice blast,

Xieyou 136 is a new medium indica hybrid rice combination bred by the Institute of Agricultural Sciences of the Lixiahe Region in Jiangsu. This combination is high-yielding and stable, with an average yield of about 650 kg per mu, more than 8% higher than that of Shanyou 63. Its full growth period is 145 days, with a well-coordinated panicle-grain structure and relatively high grain weight; generally 170,000-190,000 effective panicles per mu, 122.4-167.3 total grains per panicle, a seed-setting rate of about 90%, and a 1000-grain weight of more than 30 g. It has a compact plant type, strong tillering ability, good luxuriance, and strong lodging resistance; at maturity the stems remain green and the grains turn yellow, giving an excellent appearance at maturity; it is resistant to rice blast and moderately resistant to bacterial leaf blight; its rice quality is excellent.

This combination was entered in the provincial hybrid indica regional trial from 1997 to 1998, with an average yield of 622.38 kg per mu, 5.18% higher than that of Shanyou 63. In 1999 it was entered in the provincial hybrid indica production trial, with an average yield 9.55% higher than that of Shanyou 63, a highly significant increase. It was approved and released for promotion in 2000.

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