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Titolo:
Genetic analysis of rice grain quality
Autore:
He, P; Li, SG; Qian, Q; Ma, YQ; Li, JZ; Wang, WM; Chen, Y; Zhu, LH;
Indirizzi:
Chinese Acad Sci, Inst Genet, Beijing 100101, Peoples R China Chinese AcadSci Beijing Peoples R China 100101 100101, Peoples R China Sichuan Agr Univ, Inst Rice, Wenjian 611130, Peoples R China Sichuan Agr Univ Wenjian Peoples R China 611130 611130, Peoples R China
Titolo Testata:
THEORETICAL AND APPLIED GENETICS
fascicolo: 3-4, volume: 98, anno: 1999,
pagine: 502 - 508
SICI:
0040-5752(199903)98:3-4<502:GAORGQ>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
ORYZA-SATIVA L.; AMYLOSE CONTENT; WAXY GENE; QUANTITATIVE TRAITS; ENVIRONMENTS; INHERITANCE; ENDOSPERM;
Keywords:
rice; cooking quality; appearance quality; DH population; QTL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Zhu, LH Chinese Acad Sci, Inst Genet, Beijing 100101, Peoples R China Chinese Acad Sci Beijing Peoples R China 100101 Peoples R China
Citazione:
P. He et al., "Genetic analysis of rice grain quality", THEOR A GEN, 98(3-4), 1999, pp. 502-508

Abstract

The inheritance of grain quality is more complicated than that of other agronomic traits in cereals due to epistasis, maternal and cytoplasmic effects. and the triploid nature of endosperm. In the present study, an established rice DH population derived from anther culture of an indica/japonica hybrid was used for genetic analysis of rice grain quality. A total of five parameters, amylose content (AC), alkali-spreading score (ASS), gel consistency (GC), percentage of grain with a white core (PGWC) and the square of thewhite core (SWC), were estimated for the DH lines and the parent varieties. For each parent, the value of each parameter was relatively stable in three locations, Beijing, Hangzhou and Chengdu, while the differences between the parents were significant for all five parameters. AC showed a bimodal distribution, and the distribution of ASS was skewed toward the value of JX17, while the other three parameters displayed continuous distributions among the DH lines with partially transgressive segregations. For AC, a minor and a major gene were found on chromosomes 5 and 6 respectively. The major gene, which should be an allele of wx, explained 91.9% of the total variation. For GC, two QTLs were identified on chromosomes 2 and 7 respectively. For ASS, a minor and a major gene were both located on chromosome 6. The major gene should be the same locus as the alkali degeneration gene talk). Genetic linkage between alk and wx was found in QTL mapping. For PGWC, two QTLswere located on chromosomes 8 and 12. Only a minor QTL was found for SWC on chromosome 3. The results and the molecular markers presented here may beuseful in rice breeding for grain quality improvement.

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Documento generato il 15/07/20 alle ore 20:28:36