3.2. Comparison of seed dry matter accumulation and moisture content dynamics among hybrids and seed position
At each field site and seed position on the capitulum, the response of seed dry weight as a function of moisture content was similar between the two oilseed hybrids, but not the confectionary hybrid (Table 2). For all three hybrids, characteristics of the inner seed tended to be much different than seeds from the outer and middle concentric thirds of the capitulum (Table 3). Inner seeds always had less mass than outer and middle seed, and except in one instance (i.e., 8N-272 in Minnesota; Fig. 2), they had greater moisture content at PM than the other seeds (Fig. 1, Fig. 2 and Fig. 3). Lack of filling is characteristic of seed near the center of the capitulum and this can vary with cultivar (Seiler, 1997). This was likely the primary reason for the consistent difference in response of inner seed compared to seed from the middle and outer zones of the capitulum. Moreover, the inner concentric third of the capitulum comprises only a small portion of total seed (i.e., 11%) for the capitulum. Therefore, the remainder of the discussion will primarily emphasize the characteristics of the outer and middle seed with respect to predicting PM based on moisture content as these zones comprised the majority of total seed.
3.2. Comparison of seed dry matter accumulation and moisture content dynamics among hybrids and seed positionAt each field site and seed position on the capitulum, the response of seed dry weight as a function of moisture content was similar between the two oilseed hybrids, but not the confectionary hybrid (Table 2). For all three hybrids, characteristics of the inner seed tended to be much different than seeds from the outer and middle concentric thirds of the capitulum (Table 3). Inner seeds always had less mass than outer and middle seed, and except in one instance (i.e., 8N-272 in Minnesota; Fig. 2), they had greater moisture content at PM than the other seeds (Fig. 1, Fig. 2 and Fig. 3). Lack of filling is characteristic of seed near the center of the capitulum and this can vary with cultivar (Seiler, 1997). This was likely the primary reason for the consistent difference in response of inner seed compared to seed from the middle and outer zones of the capitulum. Moreover, the inner concentric third of the capitulum comprises only a small portion of total seed (i.e., 11%) for the capitulum. Therefore, the remainder of the discussion will primarily emphasize the characteristics of the outer and middle seed with respect to predicting PM based on moisture content as these zones comprised the majority of total seed.
การแปล กรุณารอสักครู่..
