Studies On The Breeding, Seed Production & Utilization Of New Hybrid Rice Cv Xinliangyou 343

In this paper, the breeding of new two-line Hybrid Rice cv. Xinliangyou 343 (Xin’an S/YR343) was researched. And its characteristics, cultivation and seed production techniques were studied as well. The market prospects were also analyzed and predicted.The new two-line Hybrid Rice cv. Xinliangyou 343 was bred from a male sterile line Xin’an S and restorer line YR343. In 2006, Xinliangyou 343 was selected because of its outstanding performance. It was tested in the late maturity middle indica group of Yangtze River in southern China of national variety test in 2008-2009. Performance in two years tests and one year production test:the moderate maturity, high yield, good quality, resistance to lodging. In a word, the comprehensive characters were good, so it passed the variety examination in 2010.If the new two-line Hybrid Rice cv. Xinliangyou 343 was cultivated in the middle and lower Yangtze area it should be sow in the end of April or in early May. The seed amount was 1.0kg every 667m2 fields and the seedling sowing quantity was 15kg/667m2. Transplanting seeding age should be 30-35d, planting density was 1.5-2.0 million plants /667m2, one seedling was in one hole.42% fertilizer was ploughed before planting with controlled-release compound (N:P:K=22:8:12) 525 kg/hm2. Urea mixed with herbicide about 120 kg/hm2 was used to promote tillering at about 70d after transplanting. It should be roasted field to control ineffective tillers at about 20-25d after transplanting. The fertilizer should be used late according to the plan during the middle and late growth stage. Fertilization can promote flowers after overlying water and disease weeds should be prevented.Sowing interval of the parents was 43d in reproduction of cv. Xinliangyou 343. The suitable proportion of the male and female parents line was 1:10-12. The interval between male parents was 26.7cm-30.0cm,1600 points were in each 666.7m2 and 8-10 seedlings were in each point. The interval between female parent was 16.67cm×20.00cm,20000 points were in each 666.7m2 and 5-6 seedlings were in each point.The seedling age of father of 1 was within 35d, shallowly, evenly and single row planting can promote grow early and fast. More tillers should be planted by one line and less tillers should be planted by double line. The proportion of father 1 and father 2 was 1:1. The seedling age of female parents was about 20d. Two strains were in one point to ensure enough female parents.4.8hm2 demonstration results in Jingzhou, Hubei show that the new two-line Hybrid Rice cv. Xinliangyou 343 was 7.8% better than CK(the difference was significant level). In 2012 and 2011,2.2 × 106 kg hybrid rice seed were seeded in 120000 hectares, Its output value was about 86400000 yuan and profit was 33300000 yuan, which had achieved good economic and social benefits.