Change characteristics of comprehensive traits of barley varieties(strains)in the compara-tive identification tests in coastal areas of Jiangsu Province of China from 2007 to 2021
Barley production in Jiangsu coastal area is at the leading level in China.Investigating the evolutionary patterns of barley varieties(strains)and their main agronomic traits in the Jiangsu coastal areas over the past 15 years has great significant importance to barley production in China.Based on the statistical data from comparison and identification of barley varieties(strains)tests in Jiangsu coastal areas from 2007 to 2021,various methods in-eluding linear regression analysis,path analysis and correlation analysis were employed to study characteristics of changes in agronomic and quality traits of barley varieties(strains)in Jiangsu coastal areas over the past 15 years.The results indicate that:in recent 15 years,barley varieties(strains)in Jiangsu coastal areas showed an increased trend in plant height,spike length,spike numbers per unit area,kernel numbers per spike,1 000-grain weight and yield,among which the plant height increased significantly at an average annual rate of 0.69 cm,and the spike num-bers per unit area increased significantly at an average annual rate of 7.05 x 104 hm-2,the number of grains per spike increased by 0.12 grains per year,the average annual increase of 1 000-grain weight was 0.26 g and the aver-age annual increase of yield was 27.58 kg·hm-2.There was no significant change in growth period.In recent years,barley varieties(strains)bred in Jiangsu coastal areas have exhibited a decreasing trend in the protein content,and some high-quality barley varieties including S9,S11,Y6,Y7 and Y21 with protein content≤12.50％.The syner-gistic development of the three factors of yield was the key driving factor for the increase of barley yield in Jiangsu coastal areas in recent 15 years.However,the increased of plant height and frequent extreme weather which led to the worsening of barley collapse were the main reasons restricting the further improvement of barley yield in coastal areas of Jiangsu Province.This study revealed the characteristics of changes in agronomic and quality traits of barley varieties(strains)in Jiangsu coastal areas in the past 15 years,and elucidated the relationship between barley major traits and yield.It could provide reference for the coordinated development of high yield and high quality barley vari-eties in China.
barleyagronomic traitquality charactervarieties comparison and identification
NETL
NSTL
万方数据
