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《China Rice》 2016-02
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Study on Quality Traits and Inheritance of Hybrid Rice and Its Parents

HUANG Zhiyuan;LV Qiming;XIN Yeyun;FU Xiqin;PENG Yulin;YUAN Longping;State Key Laboratory of Hybrid Rice / Hunan Hybrid Rice Research Center;  
Genetic analysis of the mid-parent heterosis and heterobeltiosis in rice quality was carried out by using the hybrid rice and their parents as the research objects. The results showed that the mid-parent heterosis and heterobeltiosis of brown rice and milled rice rate of hybrid rice were positive, the mid-parent heterosis and heterobeltiosis of head rice rate of hybrid rice were negative. The average 1 000-grains weight of hybrid rice was 26.48 g and ranged between the male sterile line and the restore line. The mid-parent heterosis of 1 000-grains weight of hybrid rice was positive and the heterobeltiosis of hybrid rice was negative. The average seed length, seed width and length-width ratio of hybrid rice was 6.59 mm, 2.24 mm and 2.98 mm respectively. The mid-parent heterosis and heterobeltiosis of seed length, seed width and length-width ratio of hybrid rice were positive. The average chalky grain rate and chalkiness degree of hybrid rice was 7.5% and 17.86%. The mid-parent heterosis and heterobeltiosis of chalky grain rate and chalki-ness degree of hybrid rice were negative. The average amylose content of hybrid rice was 16.98% and ranged between the male sterile line and restore line. The mid-parent heterosis of amylose content of hybrid rice was positive and the heterobeltiosis of amylose con-tent of hybrid rice was negative. The average gel consistency of hybrid rice was 36.28 mm, the mid-parent heterosis and heterobeltio-sis of gel consistency of hybrid rice were negative. Therefore, the ideal hybrid rice combinations with high grain quality can be select-ed according to the genetic association between the parents and hybrid rice.
【CateGory Index】: S511
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