Miyatake Takahisa
Laboratory of Animal Population Ecology, Faculty of Agriculture, Okayama University, Tsushima-naka 1-1-1, Okayama 700-8530, Japan.
Heredity (Edinb). 2002 Apr;88(4):302-6. doi: 10.1038/sj.hdy.6800044.
Chrono-biological traits were changed by selecting for life-history traits via a genetic linkage controlling both time-related behavioural and life-history traits. Behavioural traits were compared between lines selected for young (Y-lines) and old (O-lines) age at reproduction in the melon fly, Bactrocera cucurbitae (Coquillett). Adults from O-lines, which survive longer than flies from Y-lines, mated later in the day and had a longer period of circadian rhythm in the locomotor activity than those from Y-lines. Flies from F(1) reciprocal crosses had an intermediate time of mating and periods of circadian rhythm between that of the parents, indicating a genetic basis to these traits. The presence of these behavioural differences across the selection lines indicates that chrono-biological traits exhibit correlated responses to selection on age at reproduction. The correlated responses in the behavioural traits to selection for life-history traits are discussed from two points of view: pleiotropy and inadvertent selection.
通过控制与时间相关的行为和生活史特征的遗传连锁来选择生活史特征，从而改变了生物钟生物学特征。在瓜实蝇（Bactrocera cucurbitae (Coquillett)）中，比较了在繁殖时选择幼龄（Y系）和老龄（O系）的品系之间的行为特征。O系的成虫比Y系的成虫存活时间更长，它们在一天中较晚交配，并且与Y系的成虫相比，其昼夜节律的运动活动周期更长。F(1) 正反交后代的交配时间和昼夜节律周期介于亲本之间，表明这些特征具有遗传基础。这些选择品系之间存在的行为差异表明，生物钟生物学特征对繁殖年龄的选择表现出相关反应。从多效性和无意选择两个角度讨论了行为特征对生活史特征选择的相关反应。
