Chinese Journal OF Rice Science

Chinese Journal OF Rice Science >

2009 , Vol. 23 >Issue 6: 616 - 620

DOI: https://doi.org/10.3969/j.issn.1001-7216.2009.06.09

研究报告

Relationship of Panicle Type Index and Subspecies Characteristics, Yield Traits
in Filial Generations of Cross Between indica and japonica Rice

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  • 1Rice Research Institute, Shenyang Agricultural University, Shenyang 110161, China; 2Rice and Sorghum Research Institute, Sichuan Academy of Agricultural Sciences, Luzhou 646100, China； *Corresponding author, E-mail: xuzhengjin@126.com

Received date: 1900-01-01

  Revised date: 1900-01-01

  Online published: 2009-11-10

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Abstract

Two RILs populations, one derived from the cross between Zhongyouzao 8(indica) and Toyonishiki（japonica）(RILSA), the other derived from the cross between Qishanzhan(indica) and Akihikari(japonica) (RILSB), were grown in Liaoning and Sichuan, China to study the panicle type index (PTI) and its relationship with subspecies characteristics and yield traits. PTI is the ratio between the number of axis internode whose number of grains in the secondary rachis branch is the most in the primary rachis branches and number of the primary rachis branches. With continuous distribution of PTI and numerous of lines with different PTIs in the progenies, indicajaponica hybridization could be the sources of ideal panicle type. PTI was significantly influenced by environments, with a significant decrease from Liaoning to Sichuan. A significantly negative correlation was found between PTI and most of subspecies characteristics. PTI significantly varied with subspecies types. As a whole, it showed a trend as follows: indica(H)> indicalinous(H′) >japonicalinous(K′) >japonica(K). However, it is not appropriate to regard PTI as the parameters for subspecies classification in rice because PTI was recombined in the filial generations of cross between indica and japonica. A negative correlation was found between PTI and panicle characters as well as yield traits. Based on PTI values, most of lines from the two populations were middle and lower dominant type with significant yield advantages.

Key words： rice; environment; indicajaponica hybridization; panicle type index; subspecies characteristics; yield trait

Cite this article

XU Hai,ZHU Chun-jie,GUO Yan-hua, XU Quan,MAO Ting, CHEN Kai, WANG Jia-yu,YANG Li,ZHENG Jia-kui, XU Zheng-jin . Relationship of Panicle Type Index and Subspecies Characteristics, Yield Traits
in Filial Generations of Cross Between indica and japonica Rice[J]. Chinese Journal OF Rice Science, 2009 , 23(6) : 616 -620 . DOI: 10.3969/j.issn.1001-7216.2009.06.09

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