Four indicajaponica intermediate type restorer lines CH58, CH59, C18 and C84 were bred by indicajaponica crossing, identification of wide compatibility and restoring ability. The investigation of biological characteristics showed that the Cheng’s indexes of CH58, CH59, C18 and C84 were 11, 13, 13 and 15, with the former three belonging to indicalinous and the last one to japonicalinous. Identification of wide compatibility and restoring ability indicated that the four restorer lines had a good wide compatibility, and they can restore the fertility of japonica CMS lines (Dian type, BT type and DA type) and indica CMS lines (WA type and YS type). The investigation of flowering characteristics indicated that the flowering peak of the four indicajaponica intermediate type restorer lines were much earlier than the japonica CMS line Chunjiang 16A. The midparent heterosis and competitive heterosis of yield per plant, grain number per panicle, secondary branch rachis number per panicle, plant height, primary branch rachis number per panicle and flag leaf width were obvious in japonicaindica hybrid rice. Japonicaindica hybrid rice Chunyou 58, Chunyou 658, Chunyou 59 and Chunyou 618, developed from japonica CMS lines and the indicajaponica intermediate type restorer lines were registered and released by National Crop Variety Appraisal Committee or Zhejiang Provincial Crop Variety Appraisal Committee. The four indicajaponica intermediate type restorer lines with wide compatibility and broad restoring spectrum have a good prospect in the subspecies heterosis utilization.
LIN Jianrong, SONG Xinwei, WU Mingguo*
. Biological Characteristics and Heterosis Utilization of Four indicajaponica Intermediate Type Restorer Lines with Wide Compatibility[J]. Chinese Journal OF Rice Science, 2012
, 26(6)
: 656
-662
.
DOI: 10.3969/j.issn.10017216.2012.06.004
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