THE RESULTS OF THE RESTORATIVE SELECTION OF THE CAI HOA VANG GLUTINOUS RICE VARIETY IN THANH HOA PROVINCE
Abstract
Cai hoa vang glutinous rice is a specialty variety of Thanh Hoa province, with a growth duration of 153 - 155 days. The grains are opaque white, aromatic and yield a sticky texture when cooked, making the variety highly favored by consumers. The average yield ranges from 49 - 51 quintals/ha. The restorative selection process was carried out in Thanh Hoa province, over three consecutive Summer - Autumn crops, from 2022 to 2024, in accordance with TCVN 12181:2018. The results were as follows: in the first crop (Summer - Autumn 2022), 181 lines of G0 were selected; in the second crop (Summer - Autumn 2023), 50 lines of G1 and in the third crop (Summer - Autumn 2024), 12 lines of G2 were selected. The selected G2 lines exhibited high uniformity, with a growth duration of 154 days, an average plant height of 139,9 cm, an average main panicle length of 24.0 cm, an average of 5.8 panicles per hill, an average of 128.6 filled grains per panicle, a 1,000-grain weight of 26.9 g and an average grain yield of 0.49 kg/m². The brown rice grains are opaque white and aromatic. These selected lines fully conform to the varietal characteristics described in the official descriptor and were bulked to a quantity of 1.050 kg. The seed lot was tested and certified as nucleus seed by the Thanh Hoa quality Testing and Certification Agriculture, Forestry, Fisheries Center, under test certificate No. 38.SNC.M24.001.
