Analysis of Variations in White-Belly and White-Core Rice Kernels Within a Panicle and the Effect of Panicle Type

doi:10.1016/S2095-3119(13)60593-6

Journal of Integrative Agriculture ›› 2014, Vol. 13 ›› Issue (8): 1672-1679.DOI: 10.1016/S2095-3119(13)60593-6

Analysis of Variations in White-Belly and White-Core Rice Kernels Within a Panicle and the Effect of Panicle Type

ZHANG Xin-cheng, Md A. Alim, LIN Zhao-miao, LIU Zheng-hui, LI Gang-hua, WANG Qiang-sheng

College of Agronomy, Nanjing Agricultural University, Nanjing 210095, P.R.China

收稿日期:2013-06-13 出版日期:2014-08-01 发布日期:2014-08-02
通讯作者: DING Yan-feng, Tel: +86-25-84395066, E-mail: dingyf@njau.edu.cn; LIU Zheng-hui, Tel: +86-25-84395066, E-mail: liumail@aliyun.com
基金资助:
This research was supported by the Program for New Century Excellent Talents in University, China (NCET-10-0472) and the National Natural Science Foundation of China (30971733 and 31171485).

Analysis of Variations in White-Belly and White-Core Rice Kernels Within a Panicle and the Effect of Panicle Type

ZHANG Xin-cheng, Md A. Alim, LIN Zhao-miao, LIU Zheng-hui, LI Gang-hua, WANG Qiang-sheng

College of Agronomy, Nanjing Agricultural University, Nanjing 210095, P.R.China

Received:2013-06-13 Online:2014-08-01 Published:2014-08-02
Contact: DING Yan-feng, Tel: +86-25-84395066, E-mail: dingyf@njau.edu.cn; LIU Zheng-hui, Tel: +86-25-84395066, E-mail: liumail@aliyun.com
Supported by:
This research was supported by the Program for New Century Excellent Talents in University, China (NCET-10-0472) and the National Natural Science Foundation of China (30971733 and 31171485).

摘要/Abstract

摘要： This study aims to investigate the variation in occurrence of white-belly rice kernel (WBRK) and white-core rice kernel (WCRK) among different positions within a panicle. Twenty-four M4 mutants involved in four panicle types, namely the compact, intermediate, loose, and chicken foot panicle were used. They derived from a japonica rice cultivar Wuyujing 3. Considerable differences in morphological characters existed among the four types of panicle, especially in panicle length, the secondary branch number and ratio of grain number to total branch length. Marked differences were found in WBRK and WCRK among different positions within a panicle for all types of panicle. In general, grains located on the primary rachis and top rachis branches had higher WBRK and WCRK percentage than those on the secondary rachis and bottom rachis branches. WCRK exhibited larger variation among grain positions than WBRK did. Moreover, there was a significant difference in WCRK/WBRK among grain positions within a panicle, with primary rachis and top rachis branches having higher values than the secondary and bottom rachis. In addition, panicle type showed no significant effect on the pattern of WBRK and WCRK occurrence within a panicle. The results indicated the difference in mechanism of WBRK and WCRK formation in grain position within a panicle, and are valuable for breeding and agronomic practices aimed at lowering chalky grain rate.

关键词: panicle type , white-belly rice kernel , white-core rice kernel , grain position , mutants , japonica rice

Abstract: This study aims to investigate the variation in occurrence of white-belly rice kernel (WBRK) and white-core rice kernel (WCRK) among different positions within a panicle. Twenty-four M4 mutants involved in four panicle types, namely the compact, intermediate, loose, and chicken foot panicle were used. They derived from a japonica rice cultivar Wuyujing 3. Considerable differences in morphological characters existed among the four types of panicle, especially in panicle length, the secondary branch number and ratio of grain number to total branch length. Marked differences were found in WBRK and WCRK among different positions within a panicle for all types of panicle. In general, grains located on the primary rachis and top rachis branches had higher WBRK and WCRK percentage than those on the secondary rachis and bottom rachis branches. WCRK exhibited larger variation among grain positions than WBRK did. Moreover, there was a significant difference in WCRK/WBRK among grain positions within a panicle, with primary rachis and top rachis branches having higher values than the secondary and bottom rachis. In addition, panicle type showed no significant effect on the pattern of WBRK and WCRK occurrence within a panicle. The results indicated the difference in mechanism of WBRK and WCRK formation in grain position within a panicle, and are valuable for breeding and agronomic practices aimed at lowering chalky grain rate.

Key words: panicle type , white-belly rice kernel , white-core rice kernel , grain position , mutants , japonica rice

ZHANG Xin-cheng, Md A. Alim, LIN Zhao-miao, LIU Zheng-hui, LI Gang-hua, WANG Qiang-sheng. Analysis of Variations in White-Belly and White-Core Rice Kernels Within a Panicle and the Effect of Panicle Type[J]. Journal of Integrative Agriculture, 2014, 13(8): 1672-1679.

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Analysis of Variations in White-Belly and White-Core Rice Kernels Within a Panicle and the Effect of Panicle Type

Analysis of Variations in White-Belly and White-Core Rice Kernels Within a Panicle and the Effect of Panicle Type

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