The Differences of Major Phenotypic Traits of Wheat Caused by Different Environments in Sichuan and Qinghai

A study involved 435 stable lines from three populations(two DH populations,one RIL population) indicates that the average plant height,spike length,spikelet number,spikelet density of the three populations in Sichuan are 5.6-7.6 cm,2.8-3.7 cm,4.0-4.9,0.1 cm/spikelet higher than that of Qinghai,respectively.The thousand seed mass in Qinghai,however,is 6.2-28.3 g larger than that of Sichuan.The spike length and spikelet number in Sichuan are generally larger than that of Qinghai,while thousand seed mass in Qinghai is higher than that of Sichuan,with exceptions for a few lines.The plant height values of lines in Sichuan are generally higher than that of Qinghai when the plant height is higher than the average value in Sichuan.Meanwhile,differences can also be detected in both RIL and DH populations between these two sites,i.e.more lines of RIL population in Qinghai have higher plant height than that of Sichuan,this might result from expression differences of dwarf genes between these two sites.