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《Acta Agronomica Sinica》 2014-12
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Plant-type Characteristics in Populations with Different Yield of Yongyou 12

WEI Huan-He;LI Chao;ZHANG Hong-Cheng;SUN Yu-Hai;MA Rong-Rong;WANG Xiao-Yan;YANG Jun-Wen;DAI Qi-Gen;HUO Zhong-Yang;XU Ke;WEI Hai-Yan;GUO Bao-Wei;Innovation Center of Rice Cultivation Technology in Yangtze River Valley, Ministry of Agriculture, Yangzhou University;Crop Research Institute, Ningbo Academy of Agricultural Sciences of Zhejiang Province;Ningbo Seed Company of Zhejiang Province;Agricultural Technology Extention and Service,Yinzhou District, Ningbo City, Zhejiang Province;  
Using indica-japonica super rice Yongyou 12, we compared the plant-type characteristics among three types of populations(high yield: 10.5–12.0 t ha–1; higher yield: 12.0–13.5 t ha–1; super-high yield: 13.5 t ha–1). The main results indicated that in super-high yield population, the mean values of panicle length, total grains per spike, number of the primary and secondary rachises were 21.56, 356.34, 20.46, and 73.98, respectively, being higher than those in the high and higher yield populations. However, the seed-setting rate in the primary and secondary rachises showed slight reduction. Super-high yield population had longer length, larger width and higher rolling rate, smaller leaf basic angle and dropping angle, more green leaves after heading for the top-most three leaves in comparison with the other two populations. Compared with the other two populations, super-high yield population had higher plant height, longer length of top three internodes, higher ratio of sum of panicle and neck internode to plant height 39.84% and ratio of neck internode to stalk length 37.75%. The decreased length of basal three internodes, increased culm diameter, culm wall thickness and dry weight of culm and sheath made higher anti-broken strength and lower lodging index in super-high yield population.
【Fund】: 农业部超级稻新品种选育与示范项目(02318802013231);; 国家公益性行业(农业)科研专项(201303102);; 宁波市重大科技项目(2013C11001)资助
【CateGory Index】: S511.22
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