EVALUATION OF RECURRENT SELECTION FOR SPECIFIC COMBINING ABILITY IN 2 OPEN-POLLINATED MAIZE CULTIVARS
EVALUATION OF RECURRENT SELECTION FOR SPECIFIC COMBINING ABILITY IN 2 OPEN-POLLINATED MAIZE CULTIVARS
复制标题
DOI：
10.2135/cropsci1977.0011183x001700040043x
复制
发表时间：
1977-01-01
期刊：
影响因子：
2.3
通讯作者：
RUSSELL, WA
中科院分区：
文献类型：
--
作者：
WALEJKO, RN;RUSSELL, WA
在玉米（Zea mays L.）品种，Kolkmeier和兰开斯特。一个普通的，erce ross测试仪，WF 9. Hy用于第1个循环，但近交系Hy用于随后的4个循环。选择的主要依据是半同胞后代的籽粒产量。通过测量Kolkmeier和兰开斯特群体本身的产量，Hy. times. Kolkmeier Cn（n = 0，1，2.，5)和Hy. times.兰开斯特Cn测交，Kolkmeier Cn.兰开斯特Cn群体杂交，以及两个品种的C 0和C5群体与Alph C 0、Alph C5、B14 A、B73和Mo 17杂交。Kolkmeier本身没有显示出产量的显著变化;然而，兰开斯特本身具有显著的负线性趋势，-0.95 . ±-。0.45 q[英担]公顷/周期。Hy. Kolkmeier Cn and Hy.兰开斯特Cn为2.75 ±。0.45和2.23 .+-。0.45，分别。Kolkmeier Cn ×.兰开斯特Cn为线性显著，为2.45 . ±-. 0.45. C 0和C5群体与其他无关的测试者测交表现出相似的产量增益，除了B73，C 0和C5群体的测交之间没有差异。轮回选择成功地提高了有利产量效应基因在杂交组合中的出现频率，超显性效应对2个品种产量潜力的影响相对较小。利用自交系测验种进行轮回选择是改良育种群体的有效方法。显而易见的测试者将是一个已经在种子行业广泛使用的生产线。随着程序的进行，这条线可以被一条更好的线所取代，相对于早期测试者所实现的群体改善，这条线没有有害的结果。
Recurrent selection was evaluated in maize (Zea mays L.) cultivars, Kolkmeier and Lancaster. A common, singlecross tester, WF9 .times. Hy, was used in the 1st cycle, but inbred Hy was used in the 4 subsequent cycles. The principal basis of selection was grain yield of half-sib progenies. Progress for population improvement was evaluated in 5 environments by measuring yields in the Kolkmeier and Lancaster populations per se, the Hy .times. Kolkmeier Cn (n = 0,1,2...,5) and Hy .times. Lancaster Cn test-crosses, the Kolkmeier Cn .times. Lancaster Cn population crosses, and the C0 and C5 populations of both cultivars in crosses with Alph C0, Alph C5, B14A, B73 and Mo17. Kolkmeier per se did not show a significant change in yield; Lancaster per se, however, had a significant negative linear trend, -0.95 .+-. 0.45 q[quintals]ha per cycle. The rates of yield gain (q/ha) for Hy .times. Kolkmeier Cn and Hy .times. Lancaster Cn were 2.75 .+-. 0.45 and 2.23 .+-. 0.45, respectively. The rate of yield gain (q/ha) for Kolkmeier Cn .times. Lancaster Cn was linear and significant, 2.45 .+-. 0.45. Similar yield gains were expressed with the C0 and C5 populations in testcrosses with other unrelated testers, except B73 for which there were no differences between test crosses of the C0 and C5 populations. The recurrent selection program was successful in increasing frequencies of genes with favorable yield effects in crosses, and overdominance was relatively unimportant in the change in yield potential of the 2 cultivars. Recurrent selection by using an inbred line tester seems to be an efficient method to improve breeding populations. The obvious tester would be a line that is already widely used in the seed industry. As the program progresses, this line can be replaced by a better line with no deleterious results relative to the population improvement achieved by the earlier tester.