| Differences in yield of oat varieties and relationship with agronomic traits under irrigation conditions |
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| DOI：10.7606/j.issn.1000-7601.2019.06.24 |
| Key Words: oats irrigation variety yield difference agronomic traits correlation |
| Author Name | Affiliation | | ZHANG Kehou | Baiyin Insititute of Agricultural Science, Baiyin, Gansu 730900, China | | CHEN Ying | Baiyin Insititute of Agricultural Science, Baiyin, Gansu 730900, China | | ZHANG Pingzhen | Baiyin Insititute of Agricultural Science, Baiyin, Gansu 730900, China | | WEI Kongmei | Baiyin Insititute of Agricultural Science, Baiyin, Gansu 730900, China | | YANG Jizhong | Baiyin Insititute of Agricultural Science, Baiyin, Gansu 730900, China |
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| Abstract: |
| Oats are traditional dryland crops with low and instable yield, especially, with lodging under irrigation conditions. In order to investigate the special requirements for agronomic traits of high\|yield oat varieties under irrigation conditions, the yield differences and correlations and path analysis of the main agronomic traits were carried out for 12 oat varieties. The results showed that there were significant differences in yield of oat varieties and basic seeding, spike number, grain number per spike, thousand seed weight, main spike length, flag leaf length, but no significant differences in growth period and plant height. The yield was between 3 706.20~5 106.30 kg·hm-2 with a coefficient of variation,CV=10.07%. Oat variety, MF9521-281, had the highest yield. The correlation analysis showed that the yield was positively correlated with spike number (r=0.9557), basic seedling (r=0.6761), and thousand\|seed\|weight (r=0.5186), plant height (r=0.2634), growth period (r=0.0964), but negatively correlated with grain number per spike (r=-0.4452), main spike length (r=-0.5977), and flag leaf length (r=-0.9376). The orders of the direct path coefficients of each trait to yield were: spike number > thousand seed weight > grain number per spike > growth period > flag leaf length > basic seedling > plant height > main spike length. The comprehensive analysis showed that the ideal models of agronomic traits for high yield of oats under irrigation conditions were: higher spike number (508.05~552.75×104 hm-2, suitable basic seedling (420.00~422.55×104 hm-2), thousand seed weight (22.27~25.25 g）, plant height（113.85~118.80 cm）, growth period (85 d), smaller grain number per spike (46.75~50.18), main spike length (18.90~19.95 cm), flag leaf length (16.50~17.60 cm). |
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