Variability of grain and milled rice quality traits of long-grain rice variety

Ruslan Dzhamirze,Natalia Chinchenko,Nadezhda Ostapenko,S Belousov,S Roshchupkin

doi:10.1051/e3sconf/202128502035

Abstract

The article presents results of studying 14 families of longgrain rice variety Sharm, divided into two groups. A detailed assessment of technological indicators of grain and milled rice quality in primary seed production nurseries (P-1 and P-2) is given. Variability and correlation of traits is calculated. The experiment was carried out in the period 2016-2018 under the conditions of a field experiment as a control nursery, on the rice irrigation system of FSBSI “FSC of Rice” (Federal State Budgetary Scientific Institution “Federal Scientific Rice Centre”), Krasnodar. In a group of families with typical plants, significant excess of some technological indicators of grain and milled rice quality was revealed in comparison with the original variety Sharm, entered in the state register in 2013: for example, the weight of 1000 grains of the combined families after rejection was 27.6 g; fracturing is significantly lower - 10.2%; also, in terms of the total milling yield, head rice content, significant excess of the combined families was noted - 67; 92.1 and 59.6%. The variability of the considered technological traits is weak and varies within the range of up to 10%, with the exception of fracturing (CV up to 93%), since it is highly susceptible to weather fluctuations. In both groups of families, a close positive correlation was found between the head rice content in the milled rice and its content in the grain (r = 0.981 and 0.989) and a negative average relationship between fracturing and the total milling yield (r = -0.568 and -0.646, respectively). When rejecting families of the variety Sharm in P-1 and P-2, it is recommended to use, in addition to morphological characteristics, the indicator of the mass of 1000 grains and the grain index (l / b).

Highlights

In a scientifically grounded technological system for the cultivation of agricultural plants, breeding and seed production occupy a leading place as the most powerful, environmentally friendly levers in increasing the yield and quality of crop production [1, 2].An important element of rice growing is rice seed production - a system of measures to preserve varietal qualities, grow seeds of high sowing conditions, reproduce them in the required quantities, store and control their quality [3, 4].The plant density, the uniformity of crops, simultaneous passage of the rice plants through the growing season depends on the quality of the seeds [5]
By following the correct primary seed production policy, it is possible to maintain the variety in an unchanged state by removing families with unusual traits from the 1st year nursery
In accordance with the above, it should be noted that, as a result of the influence of external conditions, awnless families and families with awn rudiments were distinguished in the population of the long-grain rice variety Sharm

Summary

Introduction

In a scientifically grounded technological system for the cultivation of agricultural plants, breeding and seed production occupy a leading place as the most powerful, environmentally friendly levers in increasing the yield and quality of crop production [1, 2].An important element of rice growing is rice seed production - a system of measures to preserve varietal qualities, grow seeds of high sowing conditions, reproduce them in the required quantities, store and control their quality [3, 4].The plant density, the uniformity of crops, simultaneous passage of the rice plants through the growing season depends on the quality of the seeds [5]. If close attention is paid to the morphological characteristics in the process of primary seed growing of varieties, the technological traits of grain and milled rice have usually never been studied.

Results

Conclusion