Abstract
A new zebra leaf mutant zebra1349 was attained in a restorer line crossing population of [R128//(R318/R1025) F1] F6 in Hengyang Agricultural Science Research Institute of Hunan province. This mutant showed normal green leaves at seedlings stage, but a zebra leaf phenotype with green-yellow bands in penpendicular to leaf vein appeared at five days after transplanting, which was most obvious at sixth-leaf stage, and recovered normal green leaves around 30 days (ninth-leaf stage) after transplanting. Until the mature stage, the zebra1349 mutant showed insignificant difference with the wild type in major agronomic traits. The contents of total chlorophyll, chlorophyll a, chlorophyll b and carotenoid in yellow parts of the mutant leaf at sixth-leaf stage decreased by 55.86%, 61.02%, 39.34%, and 47.03%, respectively. Transmission Electron Microscopic (TEM) results indicated that the chloroplast of the mutant yellow leaf showed a serious thylakoid membrane degradation and decomposition, and the number of thylakoid grana lamella decreased significantly with larger gap and looser arrangement. Genetic analysis using F1 and F2 of the reciprocal crosses between zebra1349 and normal green rice varieties revealed that the zebra-leaf trait was controlled by
Published Version
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