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Physicochemical and milling properties of rice kernels from upper, middle, and basal spikelets of hybrid and inbred lines at early and ideal harvesting stages
Author(s) -
Polidoro Edimara,
El Halal Shanise Lisie Mello,
Villanova Franciene Almeida,
Lindemann Igor da Silva,
Wang YaJane,
Vanier Nathan Levien
Publication year - 2020
Publication title -
cereal chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.558
H-Index - 100
eISSN - 1943-3638
pISSN - 0009-0352
DOI - 10.1002/cche.10294
Subject(s) - amylose , cultivar , panicle , crystallinity , agronomy , chemistry , mathematics , starch , horticulture , moisture , zoology , food science , biology , crystallography , organic chemistry
Background and objectives Grains from a hybrid (Inov CL) and an inbred (Irga 424 RI) line were studied as a function of harvesting time (supposed early and ideal maturity stages) and panicle position (upper, middle, and basal). Findings In general, greater head rice yield (HRY) and thousand grain weight were observed when the kernels were harvested with 22% moisture content. At this moisture content, HRY varied from 52.3% to 63.8% for Inov CL and from 68.2% to 69.8% for Irga 424 RI, depending on panicle position. All studied starches showed similar molecular weight distribution. Relative crystallinity varied from 18.7% to 22.0%. The protein content and extractability at different media differed just for kernels from Inov CL at the 2nd harvesting time. Conclusions To achieve better industrial performance, the rice kernels may be harvested at the ideal maturity stage of 22% moisture content or closer. Amylose content and starch structure of the Inov CL and Irga 424 RI cultivars did not differ among the studied harvesting times. Significance and novelty Obtained results improve the scientific database on factors affecting the grain quality of hybrid and inbred rice cultivars, addressing gaps that may be considered for farmers, industries, as well as for rice breeders in future rice breeding programs.