[Effects of different ecological conditions on grain quality and RVA profile of japonica rice from Yunnan of China and Korea].
Taking sixteen japonica rice varieties from Yunnan of China and Korea growing at three locations with different altitudes in Yunnan Plateau as test materials, this paper studied the effects of different ecological conditions on their grain quality, including brown rice length (BRL), brown rice width (BRW), length-width ratio (L/W), chalky rate (CR), whiteness (WH), amylose content (AC), protein content (PC), and alkali digestion value (ADV), and their starch RVA profile, including peak viscosity (PKV), hot viscosity (HTV), final viscosity (FLV), breakdown viscosity (BDV), setback viscosity (SBV), consistence viscosity( CTV), peak time (PeT), and pasting temperature (PaT). Of all the test parameters, SBV had the largest coefficient of variation. The coefficients of variation of BRL, CR, AC, PC, ADV, FLV, SBV, and PeT of Yunnan varieties were higher than those of Korean varieties, while the BRW, L/W, WH, PKV, HTV, BDV, CTV, and PaT of Korean varieties had higher coefficients of variation than those of Yunnan varieties. With increasing altitude, the BRL, BRW, L/W, WH, AC, ADV, FLV, and CTV of Yunnan varieties, and the BRL, BRW, WH, PC, PKV, HTV and BDV of Korean varieties decreased significantly, while the CR, PC, HTV, and PeT of Yunnan varieties, and the L/W, AC, ADV, SBV and CTV of Korean varieties increased significantly. The CR of Korean varieties had no obvious change. The PKV, BDV, and PaT of Yunnan varieties and the PaT of Korean varieties increased after an initial decrease, whereas the SBV of Yunnan varieties and the FLV and PeT of Korean varieties were in reverse.
Zhu
Zhen-hua
ZH
Japonica Rice Breeding Center, Yunnan Academy of Agricultural Sciences, Kunming 650205, China. zhzhh86@126.com
Kim
Ki-young
KY
Yuan
Ping-rong
PR
Zhao
Guo-zhen
GZ
Su
Zhen-xi
ZX
Liao
Xin-hua
XH
Yang
Sea-jun
SJ
Dai
Lu-yuan
LY
D002681:China; D017753:Ecosystem; D002523:Edible Grain / Q000737:chemistry*; D007723:Korea; D012275:Oryza / Q000737:chemistry* / Q000145:classification* / Q000254:growth & development; D011786:Quality Control; D013213:Starch / Q000032:analysis*
D013213:Starch